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Encryption | furthermore quantum computing advancements able utilized favor encryption well.national security agency nsa currently preparing postquantum encryption standards future.quantum encryption promises level security able counter threat quantum computing.attacks countermeasures encryption important tool sufficient alone ensu... |
Encryption | homomorphic encryption secure multiparty computation emerging techniques compute encrypted data techniques general turing complete incur high computational andor communication costs.in response encryption data rest cyberadversaries developed new types attacks.recent threats encryption data rest include cryptographic at... |
Encryption | standards cryptographic software hardware perform encryption widely available successfully using encryption ensure security may challenging problem.single error system design execution allow successful attacks.sometimes adversary obtain unencrypted information without directly undoing encryption.see example traffic ana... |
Encryption | endpoint device configured trust root certificate attacker controls example attacker inspect tamper encrypted data performing maninthemiddle attack anywhere along messages path.common practice tls interception network operators represents controlled institutionally sanctioned form attack countries also attempted employ... |
Fault tolerance | messages may padded randomly deterministically approach different tradeoffs.encrypting padding messages form padded uniform random blobs purbs practice guaranteeing cipher text leaks metadata cleartexts content leaks asymptotically minimal log log displaystyle olog log information via length.see also references rea... |
Fault tolerance | example another field motor vehicle designed continue drivable one tires punctured structure able retain integrity presence damage due causes fatigue corrosion manufacturing flaws impact.within scope individual system fault tolerance achieved anticipating exceptional conditions building system cope general aiming selfs... |
Fault tolerance | basic design magnetic drums connected via relays voting method memory error detection triple modular redundancy.several machines developed along line mostly military use.eventually separated three distinct categories machines would last long time without maintenance ones used nasa space probes satellites computers depe... |
Fault tolerance | could detect errors fix bring redundant modules needed.computer still working today.hyperdependable computers pioneered mostly aircraft manufacturers nuclear power companies railroad industry usa.needed computers massive amounts uptime would fail gracefully enough fault allow continued operation relying fact computer o... |
Fault tolerance | instance f cadc builtin selftest redundancy.in general early efforts faulttolerant designs focused mainly internal diagnosis fault would indicate something failing worker could replace it.sapo instance method faulty memory drums would emit noise failure.later efforts showed fully effective system selfrepairing diagnosi... |
Fault tolerance | examples hardware fault tolerance sometimes requires broken parts taken replaced new parts system still operational computing known hot swapping.system implemented single backup known single point tolerant represents vast majority faulttolerant systems.systems mean time failures long enough operators sufficient time fi... |
Fault tolerance | html example designed forward compatible allowing web browsers ignore new unsupported html entities without causing document unusable.additionally sites including popular platforms twitter december provide optional lightweight front end rely javascript minimal layout ensure wide accessibility outreach game consoles lim... |
Fault tolerance | similar distinction made failing well failing badly.faildeadly opposite strategy used weapon systems designed kill injure targets even part system damaged destroyed.a system designed experience graceful degradation fail soft used computing similar fail safe operates reduced level performance component failures.example ... |
Fault tolerance | resilient networks continue transmit data despite failure links nodes resilient buildings infrastructure likewise expected prevent complete failure situations like earthquakes floods collisions.a system high failure transparency alert users component failure occurred even continues operate full performance failure repa... |
Fault tolerance | source offers following examplea singlefault condition condition single means protection hazard equipment defective single external abnormal condition present e.g.short circuit live parts applied part.criteria providing faulttolerant design every component normally option.associated redundancy brings number penalties i... |
Fault tolerance | normally think primary occupant restraint system gravity.vehicle rolls undergoes severe gforces primary method occupant restraint may fail.restraining occupants accident absolutely critical safety pass first test.accidents causing occupant ejection quite common seat belts pass second test.cost redundant restraint metho... |
Fault tolerance | therefore adding seat belts vehicles excellent idea.supplemental restraint systems airbags expensive pass test smaller margin.another excellent longterm example principle put practice braking system whilst actual brake mechanisms critical particularly prone sudden rather progressive failure case necessarily duplicated ... |
Fault tolerance | cumulatively unlikely combination total foot brake failure need harsh braking emergency likely result collision still one lower speed would otherwise case.in comparison foot pedal activated service brake parking brake less critical item unless used onetime backup footbrake cause immediate danger found nonfunctional mom... |
Fault tolerance | requirements basic characteristics fault tolerance requireno single point failure – system experiences failure must continue operate without interruption repair process.fault isolation failing component – failure occurs system must able isolate failure offending component.requires addition dedicated failure detection m... |
Fault tolerance | firewalls mechanisms isolate rogue transmitter failing component protect system required.availability reversion modesin addition faulttolerant systems characterized terms planned service outages unplanned service outages.usually measured application level hardware level.figure merit called availability expressed percen... |
Fault tolerance | fault tolerance techniques research kinds tolerances needed critical systems involves large amount interdisciplinary work.complex system carefully possible interactions considered prepared for.considering importance highvalue systems transport public utilities military field topics touch research wide include obvious s... |
Fault tolerance | inputs provided replication outputs expected.outputs replications compared using voting circuit.machine two replications element termed dual modular redundant dmr.voting circuit detect mismatch recovery relies methods.machine three replications element termed triple modular redundant tmr. |
Fault tolerance | voting circuit determine replication error twotoone vote observed.case voting circuit output correct result discard erroneous version.internal state erroneous replication assumed different two voting circuit switch dmr mode.model applied larger number replications.lockstep faulttolerant machines easily made fully synch... |
Fault tolerance | started fixed initial state reset state.alternatively internal state one replica copied another replica.one variant dmr pairandspare.two replicated elements operate lockstep pair voting circuit detects mismatch operations outputs signal indicating error.another pair operates exactly way.final circuit selects output pai... |
Fault tolerance | pairandspare requires four replicas rather three tmr used commercially.failureoblivious computing failureoblivious computing technique enables computer programs continue executing despite errors.technique applied different contexts.first handle invalid memory reads returning manufactured value program turn makes use ma... |
Fault tolerance | furthermore happens execution modified several times row order prevent cascading failures.the approach performance costs technique rewrites code insert dynamic checks address validity execution time increase .recovery shepherding recovery shepherding lightweight technique enable software programs recover otherwise fata... |
Fault tolerance | systematically collected real world nulldereference dividebyzero errors prototype implementation enables application continue execute provide acceptable output service users errortriggering inputs.circuit breaker circuit breaker design pattern technique avoid catastrophic failures distributed systems.redundancy redunda... |
Fault tolerance | space redundancy provides additional components functions data items unnecessary faultfree operation.space redundancy classified hardware software information redundancy depending type redundant resources added system.time redundancy computation data transmission repeated result compared stored copy previous result.cur... |
Fault tolerance | continue passenger vehicle example either faulttolerant systems may obvious driver tire punctured.usually handled separate automated faultdetection system.case tire air pressure monitor detects loss pressure notifies driver.alternative manual faultdetection system manually inspecting tires stop.interference fault detec... |
Fault tolerance | example component b performs operation based output component fault tolerance b hide problem a. component b later changed less faulttolerant design system may fail suddenly making appear new component b problem.system carefully scrutinized become clear root problem actually component a.reduction priority fault correcti... |
Fault tolerance | infamous example chernobyl operators tested emergency backup cooling disabling primary secondary cooling.backup failed resulting core meltdown massive release radiation.cost.faulttolerant components redundant components tend increase cost.purely economic cost include measures weight.manned spaceships example many redun... |
Fault tolerance | faulttolerant design may allow use inferior components would otherwise made system inoperable.practice potential mitigate cost increase use multiple inferior components may lower reliability system level equal even worse comparable nonfaulttolerant system.related terms difference fault tolerance systems rarely problems... |
Telegram (software) | see also referencesservice also provides endtoend encrypted video calling voip file sharing several features.launched ios august android october .servers telegram distributed worldwide decrease frequent data load five data centers different regions operational center based dubai united arab emirates.various client apps... |
Telegram (software) | telegrams official components open source exception server closedsourced proprietary.telegram provides endtoend encrypted voice video calls optional endtoend encrypted secret chats.cloud chats groups encrypted app server isps thirdparties network cant access data telegram server can.users send text voice messages make ... |
Telegram (software) | history development telegram launched brothers nikolai pavel durov.previously pair founded russian social network vk left claiming taken president putins allies.pavel durov sold remaining stake vk left russia resisting government pressure.nikolai durov created mtproto protocol basis messenger pavel durov provided finan... |
Telegram (software) | disclose rents offices legal entities uses rent citing need shelter team unnecessary influence protect users governmental data requests.pavel durov said service headquartered berlin germany early moved different jurisdictions failing obtain residence permits everyone team.pavel durov left russia said moving country cou... |
Telegram (software) | users report apps issues recommend development ideas dedicated bugs suggestions platform.usage numbers october telegram announced daily active users.march telegram announced reached million monthly users million daily active users.october south korean governmental surveillance plans drove many citizens switch telegram.... |
Telegram (software) | september telegram announced app million active users delivered billion daily messages.in february telegram announced million monthly active users new users signing every day delivering billion messages daily.december telegram reached million monthly active users.march telegram reached million monthly active users.marc... |
Telegram (software) | january durov announced blog post telegram reached million monthly active users.on october telegram gained million new users result outage affected facebook affiliates.features account telegram accounts tied telephone numbers verified sms.account creation requires ios android device regardless platform intended used.us... |
Telegram (software) | associated number changed time users contacts receive new number automatically.addition user set username alias allows send receive messages without exposing phone number.telegram accounts deleted time deleted automatically six months inactivity default optionally changed month shortest months range between.users repla... |
Telegram (software) | users also option create password form twostep verification.telegram allows groups bots channels verified social media wikipedia page verified user accounts.cloudbased messages telegrams default messages cloudbased accessed users connected devices.users share photos videos audio messages files gigabytes per file.users ... |
Telegram (software) | messages chats including groups channels set autodelete hours days month although apply messages sent autodelete timer enabled.telegram offers drafts sync across user devices user starts typing message one device later continue another.draft persist editing area device sent removed.chats including groups channels sorte... |
Telegram (software) | according telegrams privacy policy data stored heavily encrypted encryption keys case stored several data centers different jurisdictions.way local engineers physical intruders cannot get access users data.telegrams local message database encrypted default.telegram clients allow users encrypt local message database set... |
Telegram (software) | sharing live location stopped time.secret chats messages also sent clienttoclient encryption socalled secret chats.messages encrypted services mtproto protocol.unlike telegrams cloudbased messages messages sent within secret chat accessed device upon secret chat initiated device upon secret chat accepted.messages sent ... |
Telegram (software) | users secret chat verify maninthemiddle attack occurred comparing pictures visualize public key fingerprints.according telegram secret chats supported perfect forward secrecy since december .encryption keys periodically changed key used times use week.old encryption keys destroyed.secret chats available android ios mac... |
Telegram (software) | user able create subscribe channels.channels created broadcasting messages unlimited number subscribers.channels publicly available alias permanent url anyone join.users join channel see entire message history.users join leave channels time. |
Telegram (software) | depending channels settings messages may signed channels name username admin posted them.nonadmin users unable see users whove subscribed channel.admin channel view statistics channel activity message view counter showing many users seen message including views forwarded messages.may creator channel add discussion grou... |
Telegram (software) | news service attempting grow audience outside u.s.in december content protection features introduced allow admins private channels groups disable screenshots message forwarding saving data communities.video voice calls end march telegram introduced endtoend encrypted voice calls.connection established peertopeer whenev... |
Telegram (software) | admins mute members default selectively well create invite links add people muted default.members use raise hand button signal desire speak.pushtotalk option available mobile versions well key shortcuts mute unmute oneself telegram desktop.admins groups channels option join group channel hiding personal account.users a... |
Telegram (software) | august telegram added video calling endtoend encryption.pictureinpicture mode also available users option use functions app remaining call.june telegram implemented group video calls across clients.users stream video camera share screen simultaneously.company stated group calls capped people temporarily limit raised so... |
Telegram (software) | group calls support selective screen sharing split screen view improved noise suppression.july update telegram introduced ability people watch streamed video.livestreams updated unlimited participants.bots june telegram launched platform thirdparty developers create bots.bots telegram accounts operated programs. |
Telegram (software) | respond messages mentions invited groups integrated programs.also accepts online payments credit cards apple pay.dutch website tweakers reported invited bot potentially read group messages bot controller changes access settings silently later point time.telegram pointed considered implementing feature would announce st... |
Telegram (software) | order activate inline bot user needs type message field bots username query.bot offer content.user choose content send within chat.bots also handle transactions provided paymentwall yandex.money stripe ravepay razorpay qiwi google pay different countries.bots also power telegrams gaming platform utilizes html games loa... |
Telegram (software) | upgrade enabled bot payments within chat using thirdparty services sberbank tranzoo payme click liqpay ecommpay process credit card information.in february telegram launched social login feature users named telegram login.features website widget could embedded websites allowing users sign third party website telegram a... |
Telegram (software) | developers change color theme use different colors names change design dark theme change maximum number comments page change height assign moderators block user spam mode filled outlined icons also supported.in june update introduced new bot menu users browse send commands chat bot.instant view instant view way view we... |
Telegram (software) | designed minimalist style article pages contain controls.article website separate possibility merge articles groups hierarchies.article author specifies title optionally subtitle usually used authors name.addition title article indicates date first publication author article cannot influence.text formatting options als... |
Telegram (software) | author adds links youtube vimeo twitter service allows embed content directly article.when article first published url generated automatically title.nonlatin characters transliterated spaces replaced hyphens date publication added address.example article titled telegraph blog platform published november would receive u... |
Telegram (software) | typing emoji user offered send respective sticker instead.stickers come collections called packs multiple stickers offered one emoji.telegram comes one default sticker pack users install additional sticker packs provided thirdparty contributors.sticker sets installed one client become automatically available clients.st... |
Telegram (software) | telegram clients also support animated emoji.reallife identification july telegram introduced online authorisation identity management system telegram passport platforms require reallife identification.asks users upload official documents passport identity card driver license etc.online service requires identification ... |
Telegram (software) | however service criticised vulnerable online brute force attacks.polls polls available android ios desktop applications.polls option anonymous visible.user enter multiple options poll.quiz mode also enabled user select right answer poll leave group guess. |
Telegram (software) | quiz bots also added track correct answers even provide global leaderboard.people nearby groups nearby people nearby help users meet new friends turning phone gps location optingin contacts groups nearby people create local group adding location data groups.architecture encryption scheme telegram uses symmetric encrypt... |
Telegram (software) | telegram messenger llp servers number countries throughout world improve response time service.telegrams serverside software closedsource proprietary.pavel durov said would require major architectural redesign serverside software connect independent servers telegram cloud.for users signed european economic area eea uni... |
Telegram (software) | official clients support sending file format extensions.builtin media viewer supports common media formats jpeg png webp images h. hevc videos mp container mp flac vorbis opus aac audio.in telegram team announced direct build android app.telegram android available directly telegram website.it automatically updated like... |
Telegram (software) | bots used among things emulate play old games app inform users vaccine availability covid.in addition telegram offers functions making payments directly within platform alongside external service stripe.monetization funding company initially supported ceos personal funds sale stake vk.january launched ico collected .bi... |
Telegram (software) | funding required cover debts amounting .million including million investors bought futures gram tokens included purchasers david yakobashvili.march telegram also sold additional bonds worth million abu dhabi mubadala investment company abu dhabi catalyst partners.day later mubadala investment company stated russias sov... |
Telegram (software) | wouldn’t open transaction fund funds invest including mubadala confirmed us rdif among lps.according contract holders bonds provided option convert shares discount company conducts open ipo.companys ceo stated move aimed enable telegram continue growing globally sticking values remaining independent.according press rep... |
Telegram (software) | late durov announced company working ad platform integrate nontargeted ads public onetomany channels already sell display ads form regular messages.ads began appear channels followers october .durov stated telegram considering paid subscription would hide ads allowing users directly support app.durov announced telegram... |
Telegram (software) | project announced middecember page technical paper became available january .codebase behind ton developed pavel durovs brother nikolai durov core developer telegrams mtproto protocol.january page white paper detailed page technical paper ton blockchain became available.durov planned power ton existing telegram user ba... |
Telegram (software) | billion.public offering took place.the development ton took place completely isolated manner release postponed several times.test network launched january .launch ton main network scheduled october .yet october u.s. securities exchange commission obtained temporary restrictive order prevent distribution grams initial p... |
Telegram (software) | ban applied nonu.s.based purchasers well telegram couldnt prevent resale grams u.s. citizens secondary market anonymity users one key features ton.following durov announced end telegrams active involvement ton.june judge approved settlement telegram sec.company agreed pay .million penalty return . |
Telegram (software) | billion gram purchasers.march telegram launched bonds offering cover debt fund growth app.use fringe groups telegram used illegal activities spreading hate messages illegal pornography contact criminals trading illegal goods services drugs contraband stolen personal data.jihadists september response question use telegr... |
Telegram (software) | isis recommended telegram supporters members october able double number followers official channel .november telegram announced blocked public channels operated isis spreading propaganda mass communication.telegram stated would block public channels bots related terrorism would honor politicallymotivated censorship bas... |
Telegram (software) | cnn news report stated telegram become known preferred means communication terror group isis used isis cell plotted paris terror attacks november attacks.daily mirror called telegram jihadi messaging app.in june russian communications regulator roskomnadzor hinted possibility blocking telegram russia due usage terroris... |
Telegram (software) | according u.s. officials crackdown telegram especially effective seems lasting impact.according europol telegram put forth considerable effort removing abusers platform.farright groups mother jones magazine reported neonazi fascist hate groups used telegram app organize gun rally richmond virginia us antidefamation lea... |
Telegram (software) | august white supremacist christopher cantwell posted antisemitic comments telegram.the antidefamation league notes telegram founded two russian brothers founded vkontakte vk known lack moderation comes white supremacy.telegrams terms service prohibit promotion violence allowed violent videos posted mass shooters brento... |
Telegram (software) | however relatively small user base algorithmic timeline groups struggle build larger audience telegram.in january telegram confirmed blocked hundreds neonazi white supremacist channels tens thousands followers inciting violence.institute strategic dialogue report farright ireland found messages irish farright groups ap... |
Telegram (software) | also provides email address dedicated reports content related child abuse.in january north macedonian media outlets reported nowbanned telegram group members titled public room јавна соба used share nude photos women often young teenage girls.along shared photographs anonymous accounts shared private information women ... |
Telegram (software) | bot abuse bot found selling leaked phone numbers facebook.the chairman public organization electronic democracy volodymyr flents may announced telegram bot appeared web sold personal data ukrainian citizens.estimated bot contains data million ukrainians registered dіia application.however subsequently deputy prime mini... |
Telegram (software) | companys founder said wants app anticensorship tool iran china similar apps role fighting censorship russia.shutdown russian political bots september prior regional elections russia telegram suspended several bots spreading information election including bot run opposition party critics incumbent president vladimir put... |
Telegram (software) | post included screenshot showing internal email sent app store developers demanding takedown content related navalny.security telegrams security model received notable criticism cryptography experts.criticized general security model permanently stores contacts messages media together decryption keys servers default ena... |
Telegram (software) | however december study titled automated symbolic verification telegram’s mtproto .published confirming security updated mtproto .reviewing it.paper provides fully automated proof soundness mtproto .’s authentication normal chat endtoend encrypted chat rekeying mechanisms respect several security properties including au... |
Telegram (software) | telegram defended lack ubiquitous endtoend encryption claiming onlinebackups use clientside encryption secure solution currently possible.critics also disputed claims telegram secure mass market messengers like whatsapp line whatsapp applies endtoend encryption traffic default uses signal protocol reviewed endorsed lea... |
Telegram (software) | organization favorable telegrams secure chats partially free code criticized mandatory transfer contact data telegrams servers lack imprint address services website.noted message data encrypted device could analyse transmission due lack source code.the electronic frontier foundation eff listed telegram secure messaging... |
Telegram (software) | telegrams optional secret chat function provides endtoend encryption received score points scorecard.eff said results read endorsements individual tools guarantees security merely indications projects right track.in december two researchers aarhus university published report demonstrated mtproto .achieve indistinguisha... |
Telegram (software) | telegram team responded flaw affect message security future patch would address concern.telegram .released december supports mtproto .satisfied conditions indcca.mtproto . |
Telegram (software) | seen qualified cryptographers vast improvement telegrams security.in april accounts several russian opposition members hijacked intercepting sms messages used login authorization.response telegram recommended using optional twofactor authentication feature.may committee protect journalists nate cardozo senior staff att... |
Telegram (software) | attackers took advantage programming interface built telegram.according telegram mass checks longer possible limitations introduced api earlier .login sms messages known intercepted iran russia germany possibly coordination phone companies.pavel durov said telegram users troubled countries enable twofactor authenticati... |
Telegram (software) | january durov explained rationale releasing serverside code citing reasons inability endusers verify released code code run servers government wanted acquire server code make messaging app would end competitors.on june intercept released leaked telegram messages exchanged current brazilian minister justice former judge... |
Telegram (software) | accounts extracted unofficial governmentsanctioned version telegram.took days database taken researchers say data accessed parties including hacker reported information specialized forum.in september reported irans rampantkitten ran phishing surveillance campaign dissidents telegram.attack relied people downloading mal... |
Telegram (software) | several theoretical vulnerabilities reported well response telegram released document stating mitm attack key exchange impossible well detailing changes made protocol protect future.issues patched papers publication security bounty paid researchers.in september russian researcher published details bug selfdestruct feat... |
Telegram (software) | third parties asked break services cryptography disclose information contained within secret chat two computercontrolled users.reward respectively us us offered.contests expired winners.security researcher moxie marlinspike founder competing signal messenger commenters hacker news criticized first contest rigged framed... |
Security alarm | puerto rico telegramgate telegram main subject surrounding puerto rico riots ended resignation thengovernor ricardo rosselló.hundreds pages group chat rosselló members staff leaked.messages considered vulgar racist homophobic toward several individuals groups discussed would use media target potential political opponen... |
Security alarm | many types security systems.homeowners typically small selfcontained noisemakers.devices also complicated multirole systems computer monitoring control.may even include twoway voice allows communication panel monitoring station.design basic alarm consists least one sensor detect trespassers alerting device indicate int... |
Security alarm | however typical premises security alarm employs following componentspremises control unit pcu alarm control panel acp simply panel brain system reads sensor inputs tracks armdisarm status signals intrusions.modern device typically one computer circuit boards inside metal enclosure.many newer networks often use sealed p... |
Security alarm | sensors detect intruders different methods.example sensors monitor doors windows openings monitor unoccupied interiors motions sound vibration disturbancesalerting devices indicate alarm condition.commonly bells sirens also flashing lights.alerting devices serve dual purposes warning occupants intrusion potentially sca... |
Security alarm | addition buttons keypads typically feature indicator lights small multicharacter display both.interconnections components.interconnections may consist direct wiring control unit wireless links local power supplies.in addition system security alarms often offer monitoring service.event alarm premises control unit contac... |
Security alarm | sensor types hermetically sealed reed switches hermetically sealed reed switch common type twopiece sensor.switch operates electrically conductive reed switch either normally open normally closed influence magnetic field respect proximity second piece contains magnet.magnet moves away reed switch reed switch either clo... |
Security alarm | passive infrared detectors passive infrared pir motion detector one common sensors found household small business environments.offers affordable reliable functionality.term passive refers fact detector generate radiate energy works entirely detecting heat energy given objects.strictly speaking pir sensors detect motion... |
Security alarm | pirs require power supply addition detection signaling circuit.infrasound detectors infrasound detector works detecting infrasound sound waves frequencies hertz.sounds frequencies inaudible human ear.due inherent properties infrasound travel distances many hundreds kilometers.infrasound signals result volcanic eruption... |
Security alarm | intruder breaks infrasound detector automatically catches sight intruders actionsthe purpose system detect burglars enter house avoid theft vandalism.sensitivity dependent size home presence animals.ultrasonic detectors active detectors transmit ultrasonic sound waves inaudible humans using frequencies khz khz.doppler ... |
Security alarm | solid objects surrounding floor walls ceiling reflect sound waves receiver detect.ultrasonic waves transmitted air hardsurfaced objects tend reflect ultrasonic energy soft surfaces tend absorb energy.when surfaces stationary frequency waves detected receiver equal transmitted frequency.however change frequency occur re... |
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