hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
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630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.13.5 fb_hash | The fb_hash field is the hash calculated on the relevant data. Its size (in bits) is determined by the fb_hash_bits operational variable. A decoder can use this value to compare against its own calculated hash to ensure that the data was received without error. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 92 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14 packet_integrity() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14.0 Introduction | The packet_integrity() element provides a mechanism to verify the integrity of the data (i.e. coded symbols) in a packet, packet group, or multiple block packet group. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14.1 packet_hash_algorithm | The packet_hash_algorithm field describes the algorithm used to calculate the hash of the data. The meaning of this field is specified in Table 70. Table 70: packet_hash_algorithm meaning packet_hash_algorithm value Meaning 000b Reserved 001b The hash is a CRC of the data, modulo the polynomial x8 + x4 + x3 + x2 + 1 wh... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14.2 packet_hash_size | The packet_hash_size field describes the number of bits of the hash digest. The meaning of this field is specified in Table 71. Table 71: packet_hash_size meaning packet_hash_size value Meaning 000b The hash digest size is 8 bits. 001b The hash digest size is 32 bits. 010b The hash digest size is 64 bits. 011b The hash... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14.3 b_packet_integrity_ext | This Boolean indicates whether the packet_integrity_ext() structure is present in the bitstream. The packet_integrity_ext() structure provides a mechanism to extend the packet integrity check with additional information and is an instance of the extension() structure. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 93 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.14.4 packet_hash | The packet_hash field is the hash calculated on the coded symbol data. The size (in bits) of this field is indicated by the packet_hash_size field. A decoder can use this value to compare against its own calculated hash to ensure that the data was received without issue. The hash is calculated on the coded_symbol field... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.15 coefficient_vector() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.15.0 Introduction | The coefficient_vector() contains the explicit coding coefficients used to encode the original data symbols for the coded symbol contained within the packet. The element contains a window_size worth of coefficients, with each coefficient requiring block_field_size_exp_val number of bits. If the coding coefficient infor... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.15.1 coded_symbol_coeff[index] | The coded_symbol_coeff[index] field is the coefficient for the indexth original symbol used to encode the coded symbol in the packet. This field requires block_field_size_exp_val number of bits. For more information on block_field_size_exp, see clause 6.1.5.23. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.16 extension() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.16.0 Introduction | The extension() element defines a mechanism to extend other structures in the bitstream. Multiple instances of this element are referenced in the bitstream and appear in place of substructures not yet defined. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.16.1 extension_byte_size | The extension_byte_size field describes the number of subsequent bytes that follow as part of the extension() structure. These bytes should be skipped by a parser conforming to the version of the syntax in the present document. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.17 packet_header_only() | The packet_header_only() structure contains only packet headers. Packets, as well as other fields contained within larger structures, inherit values from previous subatom() instances. For example, the packet() structure inherits the value of the block_field_size_exp field specified in the associated field block_header(... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18 packet_group() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.0 Introduction | The packet group (packet_group()) structure can contain a packet_group_header() as well as coded symbols. The structure is similar to a packet() structure. However, unlike the packet() structure which contains only single coded symbol, a packet_group()can have multiple coded symbols from the same block (i.e. a single b... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.1 packet_group_block_index | The packet_group_block_index, which is extendable by the packet_group_block_index_ext field, describes which block this packet_group() instance is associated with. If the bitstream only contains a single block (i.e. block_count is 1), then this field is not present in the bitstream and takes on a value of 0. As an exam... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.2 packet_group_index | The packet_group_index identifies the instance of the packet_group(). |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.3 pgns_bits | The operational variable pgns_bits is used in the syntax to specify the number of bits used to encode the packet_group_num_symbols field and is represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.4 packet_group_num_symbols | The packet_group_num_symbols field describes the number of coded symbols present within the packet group. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.5 packet_group_type | The packet_group_type field describes the type of packet group instance and whether the packet group header and coded symbols are present. The meaning of this field is specified in Table 73. Table 73: packet_group_type meaning packet_group_type value Meaning 00b Standard packet group with both packet_group_header() and... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.18.6 coded_symbol | A coded_symbol is either a systematic symbol or the encoded version of a number of source symbols, generated by applying coding to the original data symbols. The size of this field is indicated by the block_symbol_size field in the associated block_header() instance. The block_symbol_size field shall not use the value ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19 packet_group_header() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.0 Introduction | The packet_group_header() structure provides information about how the coded symbols contained in the packet_group() are arranged and encoded. Because a packet group contains multiple coded symbols, there are less options for how the group of coded symbols can be encoded compared to if each coded symbol had been indivi... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.1 packet_group_symbol_arrangement | The packet_group_symbol_arrangement field describes the order that coded symbols (including systematic symbols) appear within the packet group subatom. The meaning of this field is specified in Table 74. Table 74: packet_group_symbol_arrangement Meaning packet_group_symbol_arrangement Value Symbol Arrangement 0000b Not... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.2 packet_group_mask | The packet_group_mask field is an array of Booleans that describes which subsequent fields are present in the bitstream as listed in Table 75. Table 75: packet_group_mask meaning packet_group_mask bit Meaning 0 Reserved: This Boolean indicates whether a 32-bit reserved field is present in the bitstream. 1 Symbol index ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.3 pgsi_bits | The operational variable pgsi_bits is used in the syntax to specify the number of bits used to encode the packet_group_symbol_index fields and is represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.4 packet_group_symbol_index | For each coded symbol in the packet group, the packet_group_symbol_index field provides either an encoded symbol index value (for code types such as Reed-Solomon, or RaptorQ), or row index value in the case that a block PRNG seed is used. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.5 pgfsi_bits | The operational variable pgfsi_bits is used in the syntax to specify the number of bits used to encode the packet_group_first_symbol_index fields and is represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.6 packet_group_first_symbol_index | The packet_group_first_symbol_index field describes the symbol index of the first coded symbol in the packet group. Subsequent symbol indexes are then calculated using this value and the value of the packet_group_index_difference field. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.7 packet_group_index_difference | The packet_group_index_difference field describes the symbol index difference between successive coded symbols in a packet group. The value 0 shall not be used for this field. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 97 For example, if the first coded symbol in a packet group has a symbol index value of 6, and the packet_... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.8 pgfsii_bits | The operational variable pgsii_bits is used in the syntax to specify the number of bits used by the packet_group_symbol_index_info structure which is an instance of the extension() structure. pgsii_bits is represented by the num_bits_code() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.9 Symbol Arrangements in a Packet Group | Within a packet group subatom, a group of coded symbols from the packet_group_block_index'th block are arranged as described by the packet_group_symbol_arrangement field. When the coded symbol arrangement in a packet group is not indicated (the value of the packet_group_symbol_arrangement is 0000b) or is arbitrary (the... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.10 Encryption Parameters | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.10.0 Introduction | When bit 2 of the packet_group_mask field is set, additional encryption parameters needed to decrypt the coding coefficient information within the packet_group_header() are present in the bitstream. The encrypted coding coefficient information within the packet_group_header() can be the instances of the coefficient_vec... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.19.10.1 b_addl_packet_group_cce_params_present | This Boolean indicates whether additional encryption parameters required to decrypt the coding coefficient information, contained in the addl_cce_parameters() structure, follow in the bitstream. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.20 num_bits_code() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.20.0 Introduction | The num_bits_code()is a helper tool used to describe the number of bits used by a field in the bitstream. This tool returns the num_bits variable value. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.20.1 bits_code | The bits_code field describes the number of bits a subsequent field in the bitstream uses and returned by the num_bits variable. The meaning of this field is specified in Table 77. Table 77: bits_code meaning bits_code value Meaning 00b The value of num_bits is 8 bits. 01b The value of num_bits is 16 bits. 10b The valu... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.21 block_index_or_count_value() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.21.0 Introduction | The block_index_or_count_value() structure is a helper tool used to describe either the block index or block count as required within the context of the encompassing structure. This tool returns the block_index_or_count_val variable value. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.21.1 block_index_or_count, block_index_or_count_ext | The block_index_or_count field, which is extendable by the block_index_or_count_ext field, describes either a block index or a block count as appropriate by the context. The operational variable block_index_or_count_val can be calculated directly from the block_index_or_count and block_index_or_count_ext fields accordi... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22 multi_block_packet_group() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.0 Introduction | The multiple block (or multi-block) packet group (multi_block_packet_group()) contains the mbpg_header() as well as coded symbols. The structure is similar to the packet_group()structure. However, unlike the packet_group() structure which contains coded symbols associated with a single block, a multi_block_packet_group... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.1 mbpg_index | The mbpg_index field identifies the multi_block_packet_group() instance. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.2 mbpg_start_block_index | The mbpg_start_block_index field identifies the start block (i.e. first block) of the set of blocks represented in the multi-block packet group. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.3 mbpg_num_blocks | The mbpg_num_blocks field describes the number of blocks present within the multi-block packet group. The multi-block packet group contains blocks with block_index values in range [mbpg_start_block_index, mbpg_start_block_index + mbpg_num_blocks - 1]. For example, if mbpg_start_block_index has a value of 2, and mbpg_nu... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.4 mbpg_num_symbols | The mbpg_num_symbols field describes the number of coded symbols present within the multi-block packet group. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.22.5 coded_symbol | A coded_symbol is either a systematic symbol or the encoded version of several source symbols, generated by applying coding to the original data symbols. The size of this field is indicated by the block_symbol_size field in the associated block header subatom instance as determined by the mbpg_start_block_index value. ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23 mbpg_header() | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.0 Introduction | The mbpg_header() structure provides information about how the coded symbols contained in the multi_block_packet_group() are arranged. Because a multiple block (or multi-block) packet group contains multiple coded symbols from different blocks, there are less options for how the group of coded symbols can be encoded co... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.1 mbpg_symbol_arrangement | The mbpg_symbol_arrangement field describes the order that coded symbols (including systematic symbols) appear within the multi-block packet group subatom. The meaning of this field is specified in Table 78. Table 78: mbpg_symbol_arrangement Meaning mbpg_symbol_arrangement value Symbol Arrangement 0000b Not indicated, ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.2 mbpgsi_bits | The operational variable mbpgsi_bits is used in the syntax to specify the number of bits used to encode the mbpg_symbol_index field and is represented by the num_bits_code() structure. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 101 |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.3 mbpg_source_block_index, mbpg_symbol_index | For each coded symbol in the multiple block packet group the value of mbpg_source_block_index identifies the block the symbol comes from (i.e. the source block number), and the mbpg_symbol_index field provides either an encoded symbol index (for code types such as Reed-Solomon, or RaptorQ), or a row index in the case t... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.4 mbpgfsi_bits | The operational variable mbpgfsi_bits is used in the syntax to specify the number of bits used to encode the mbpg_first_symbol_index field and is represented by the num_bits_code() structure. 6.1.23.5 mbpg_first_symbol_index, b_mbpg_is_symbol_group_subset, mbpg_symbol_group_subset_index After arrangement to symbol grou... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.6 mbpg_index_difference | The mbpg_index_difference field describes the symbol index difference between successive coded symbols in a multi-block packet group. The value of this field may also correspond to the total number of symbol groups. The value 0 shall not be used for this field. For example, if the first coded symbol in a multi-block pa... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.7 mbpgsai_bits_code | The mbpgsai_bits_code field describes the number of bits used by the mbpg_symbol_arrangement_info structure which is an instance of the extension() structure. The value of the mbpgsai_bits_code field is specified in Table 79. Table 79: mbpgsai_bits_code meaning mbpgsai_bits_code value Meaning 0 8 bits 1 16 bits 2 32 bi... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.8 Symbol Arrangements in a Multiple Block Packet Group | Within a multiple block packet group subatom, a group of coded symbols from blocks mbpg_start_block_index … mbpg_start_block_index+mbpg_num_blocks-1 are arranged into symbol groups as described by the mbpg_symbol_arrangement field. This symbol group is either directly used in its entirety, or a subset is used to form t... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.9 b_mbpg_integrity_present | This Boolean indicates whether the mbpg_integrity() structure is present in the bitstream. The mbpg_integrity() structure is an instance of the packet_integrity() structure that applies to the group of coded symbols within the multiple block packet group. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 6.1.23.10 b_mbpg_header_ext_present | This Boolean indicates whether the mbpg_header_extension() structure is present in the bitstream. The mbpg_header_extension() structure provides a mechanism to extend the packet header syntax with additional information and is an instance of the extension() structure. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7 Design considerations | 7.0 Introduction This clause describes design considerations for encoders, and parsers/decoders. |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.1 Coding coefficients | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.1.0 Generating coding coefficients using a PRNG | A PRNG can be used to generate coding coefficients that are applied to source symbols to create coded symbols. Rather than transmit the coding coefficients in the bitstream, the means for generating the coefficients are parameterized and the resulting parameters are transmitted for a decoder to regenerate the coefficie... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.1.1 Coefficient density control | The density controller manages the sparsity of non-zero coefficients. The controller can be thought of a function that accepts a number generated by the PRNG and the density percentage value for either the block or packet (as an integer, density_int) and returns either a 0 or a 1. When the value is 1, then the block (o... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.1.2 Mersenne twister PRNG type | When either the block or packet prng_type field has a value of 000b, a Mersenne Twister (MT) based PRNG is used. The standardized MT19937 [8] shall be used. The PrngMT class shown in the pseudo-code in Table 83 takes the seed, density (as an integer) and the field size exponent, controls the density and subsequently ge... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.2 Handling variable source symbol size | Applications of the CMMF bitstream may include cases where the size of the data source symbols is not constant. Since most code types require equal-sized source symbols, the CMMF bitstream format was designed not to support explicit description of the size for each symbol. ETSI ETSI TS 103 973 V1.2.1 (2026-03) 109 When... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.3 Encrypting coding coefficient information | |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.3.0 Introduction | The CMMF bitstream supports encryption of coding coefficient information. Encrypting the coding coefficient information can provide an extra layer of security for protecting content. Depending on the infrastructure an application uses, different methods for handling the necessary encryption keys can be used. ETSI ETSI ... |
630bb3779e33ebc8586024227b48f59f | 103 973 | 7.3.1 Using a bitstream/session key and symmetric keys | As an example of one method to handle encryption of coding coefficient information, a bitstream or session key, and symmetric keys can be used. In this example, there a single bitstream consisting of multiple blocks. This method uses a combination of keys to provide secure delivery of coefficient vectors to clients. Ea... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 1 Scope | The present document specifies the minimum requirements to demonstrate compliance with ETSI EN 303 798 [1]. |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 2 References | |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which a... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks i... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 3 Definition of terms, symbols and abbreviations | |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 3.1 Terms | For the purposes of the present document, the terms given in ETSI EN 303 798 [1] and ETSI TR 121 905 [i.1] apply. |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 3.2 Symbols | Void. |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 3.3 Abbreviations | For the purposes of the present document, the abbreviations given in ETSI EN 303 798 [1], ETSI TR 121 905 [i.1] and the following apply: ATS Abstract Test Suite GCF Global Certification Forum ICS Implementation Conformance Statement IUT Implementation Under Test PICS Protocol Implementation Conformance Statement PTCRB ... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 4 Protocol aspects | |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 4.1 LTE-V2X | The supplier of an LTE-V2X implementation shall complete the Implementation Conformance Statement (ICS) in Annex A of ETSI TS 136 523-2 [4]. The parts of the Table A.4.4-1 of ETSI TS 136 523-2 [4] which are applicable to ETSI EN 303 798 [1] are items 148 to 157. The protocol tests performed shall be as described in cla... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 4.2 NR-V2X | The supplier of an NR-V2X implementation shall complete the Implementation Conformance Statement (ICS) in Annex A of ETSI TS 138 508-2 [16]. The items applicable to ETSI EN 303 798 [1] protocol aspects are Table A.4.3.7 rows 33 and 44, and Table A.4.4-2A. NOTE 1: For NR, a combined ICS for radio and protocol (signallin... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 5 Radio transmission and reception aspects | |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 5.1 LTE-V2X | The supplier of an LTE-V2X implementation shall complete the Implementation Conformance Statement (ICS) in Annex A of ETSI TS 136 521-2 [7]. The items applicable to ETSI EN 303 798 [1] are in Tables A.4.3-4d, A.4.3-4da and A.4.3-4db. The radio transmission and reception tests performed shall be as defined in ETSI TS 13... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 5.2 NR-V2X | The supplier of an NR-V2X implementation shall complete the Implementation Conformance Statement (ICS) in Annex A of ETSI TS 138 508-2 [16]. The items applicable to ETSI EN 303 798 [1] radio aspects are Table A.4.1-1 item 3 and Table A.4.3.7 rows 33 and 44. NOTE: For NR, a combined ICS for radio and protocol (signallin... |
d190d70747e85b6cace0a09c4d5f2d35 | 103 969 | 6 Protection of DSRC tolling stations | The following shall be applicable to both LTE-V2X and NR-V2X IUTs. The supplier of an implementation shall complete the Protocol Implementation Conformance Statement (PICS) in Annex A of ETSI TS 102 916-1 [9] for Mode A. The Test Suite Structure and Test Purposes (TSS&TP) used shall be as defined in ETSI TS 102 916-2 [... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 1 Scope | The present document defines a new proof method via a challenge-response authentication protocol based on predicate encryption, in particular on Ciphertext Policy-Attribute Based Encryption (CPABE). In this proof method, CP-ABE keys encode attributes, while the expressiveness of CP-ABE policies enables their selective ... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 2 References | |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which a... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks i... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 3 Definition of terms, symbols and abbreviations | |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 3.1 Terms | For the purposes of the present document, the following terms apply: Anonymous authentication: process or action of proving a credential is valid, without tracing back the Owner Anonymous proof : proof for which the Verifier has no reasonable chance to trace back the Prover Claim: assertion made about a (Data) Subject ... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 3.2 Symbols | For the purposes of the present document, the following symbols apply: A, B, C, D Attributes l, λ Security parameter (natural number) Zp Set of integers modulo prime number p i Imaginary unit (such that i2 + 1 = 0 in Zp) P(x,y) Point on elliptic curve E1 P(x',y') Point on elliptic curve E2 E1, E2 Pairing friendly ellip... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: ABE Attribute Based Encryption AP Access Policy BBS Boneh, Boyen, and Shacham CCA Chosen Ciphertext Attack CP-ABE Ciphertext Policy-Attribute Based Encryption CT CipherText LSSS Linear Secret Sharing Scheme ETSI ETSI TS 103 964 V1.1.1 (2025-02... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4 ABE challenge/response authorization method | |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.1 Introduction | |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.1.1 Overview | The present document defines a challenge-response authentication and authorization method based on Attribute Based Encryption (ABE). The method was originally described in ETSI TS 103 532 [6], clause 7.6 as a method for authentication, however the present document extends and generalize its purpose by introducing authe... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.1.2 Functional Credentials | Functional credentials, introduced by [i.6], are a generalization and unification of anonymous credentials and their derivates. Functional credentials use a scheme almost exclusively built on top of predicate encryption, providing a very natural way to prove predicates. Given a ciphertext encoding a presentation policy... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.1.3 Verifiable Credentials | The present document maps Functional credentials to W3C® defined Verifiable Credentials [8]. At the time of writing, existing or ad-hoc invented additional signature schemes are being progressively introduced in Verifiable Credentials to fit zero knowledge requirements. Essentially these new signature schemes turn a tw... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.2 Protocol | |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.2.1 Description | The present clause amends the protocol presented in ETSI TS 103 532 [6], clause 7.6 as follows: 1) The prover shall issue a resource request including the resource identifier to be accessed. If desired, the prover may include the subject's identity. NOTE 1: In the original protocol, an optional parameter was the subjec... |
c8aa7c7324d12a089bcbc74176078ba3 | 103 964 | 4.2.2 Predicate Encryption Schema | The present document builds on Cyphertext Policy Attribute-Based Encryption (CP-ABE) as predicate encryption schema. In CP-ABE [i.4], decryption keys embed user's attributes while an arbitrary predicate may be embedded in the ciphertext. The message is disclosed to users holding a key only if the attributes match the p... |
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