Network Working Group | J. Benet |
Internet-Draft | Protocol Labs |
Intended status: Standards Track | M. Sporny |
Expires: February 19, 2021 | Digital Bazaar |
August 18, 2020 |
The Multihash Data Format
draft-multiformats-multihash-01
Cryptographic hash functions often have multiple output sizes and encodings. This variability makes it difficult for applications to examine a series of bytes and determine which hash function produced them. Multihash is a universal data format for encoding outputs from hash functions. It is useful to write applications that can simultaneously support different hash function outputs as well as upgrade their use of hashes over time; Multihash is intended to address these needs.
This specification is a joint work product of Protocol Labs, the W3C Digital Verification Community Group, and the W3C Credentials Community Group. Feedback related to this specification should logged in the issue tracker or be sent to public-credentials@w3.org. .
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This Internet-Draft will expire on February 19, 2021.
Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved.
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Multihash is particularly important in systems which depend on cryptographically secure hash functions. Attacks may break the cryptographic properties of secure hash functions. These cryptographic breaks are particularly painful in large tool ecosystems, where tools may have made assumptions about hash values, such as function and digest size. Upgrading becomes a nightmare, as all tools which make those assumptions would have to be upgraded to use the new hash function and new hash digest length. Tools may face serious interoperability problems or error-prone special casing.
How many programs out there assume a git hash is a SHA-1 hash?
How many scripts assume the hash value digest is exactly 160 bits?
How many tools will break when these values change?
How many programs will fail silently when these values change?
This is precisely why Multihash was created. It was designed for seamlessly upgrading systems that depend on cryptographic hashes.
When using Multihash, a system warns the consumers of its hash values that these may have to be upgraded in case of a break. Even though the system may still only use a single hash function at a time, the use of multihash makes it clear to applications that hash values may use different hash functions or be longer in the future. Tooling, applications, and scripts can avoid making assumptions about the length, and read it from the multihash value instead. This way, the vast majority of tooling – which may not do any checking of hashes – would not have to be upgraded at all. This vastly simplifies the upgrade process, avoiding the waste of hundreds or thousands of software engineering hours, deep frustrations, and high blood pressure.
A multihash follows the TLV (type-length-value) pattern and consists of several fields composed of a combination of unsigned variable length integers and byte information.
The following section details the core data types used by the Multihash data format.
A data type that enables one to express an unsigned integer of variable length.
When encoding an unsigned variable integer, the unsigned integer is serialized seven bits at a time, starting with the least significant bits. The most significant bit in each output byte indicates if there is a continuation byte. It is not possible to express a signed integer with this data type.
Value | Encoding (bits) | hexadecimal notation |
---|---|---|
1 | 00000001 | 0x01 |
127 | 01111111 | 0x7F |
128 | 10000000 00000001 | 0x8001 |
255 | 11111111 00000001 | 0xFF01 |
300 | 10101100 00000010 | 0xAC02 |
16384 | 10000000 10000000 00000001 | 0x808001 |
Implementations MUST restrict the size of the varint to a max of nine bytes (63 bits). In order to avoid memory attacks on the encoding, the aforementioned practical maximum length of nine bytes is used. There is no theoretical limit, and future specs can grow this number if it is truly necessary to have code or length values larger than 2^31.
A multihash follows the TLV (type-length-value) pattern.
The hash function identifier is an unsigned variable integer identifying the hash function. The possible values for this field are provided in The Multihash Identifier Registry.
The digest length is an unsigned variable integer counting the length of the digest in bytes.
The digest value is the hash function digest with a length of exactly what is specified in the digest length, which is specified in bytes.
0x12 20 41dd7b6443542e75701aa98a0c235951a28a0d851b11564d20022ab11d2589a8
For example, the following is an expression of a SHA2-256 hash in hexadecimal notation (spaces added for readability purposes):
[RFC2119] | Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997. |
[RFC6234] | Eastlake 3rd, D. and T. Hansen, "US Secure Hash Algorithms (SHA and SHA-based HMAC and HKDF)", RFC 6234, DOI 10.17487/RFC6234, May 2011. |
[RFC7693] | Saarinen, M-J. and J-P. Aumasson, "The BLAKE2 Cryptographic Hash and Message Authentication Code (MAC)", RFC 7693, DOI 10.17487/RFC7693, November 2015. |
[RFC6150] | Turner, S. and L. Chen, "MD4 to Historic Status", RFC 6150, DOI 10.17487/RFC6150, March 2011. |
[RFC6151] | Turner, S. and L. Chen, "Updated Security Considerations for the MD5 Message-Digest and the HMAC-MD5 Algorithms", RFC 6151, DOI 10.17487/RFC6151, March 2011. |
There are a number of security considerations to take into account when implementing or utilizing this specification. TBD
Merkle–Damgård
The multihash examples are chosen to show different hash functions and different hash digest lengths at play. The input test data for all of the examples in this section is:
0x11148a173fd3e32c0fa78b90fe42d305f202244e2739
The fields for this multihash are - hashing function: sha1 (0x11), length: 20 (0x14), digest: 0x8a173fd3e32c0fa78b90fe42d305f202244e2739
0x122041dd7b6443542e75701aa98a0c235951a28a0d851b11564d20022ab11d2589a8
The fields for this multihash are - hashing function: sha2-256 (0x12), length: 32 (0x20), digest: 0x41dd7b6443542e75701aa98a0c235951a28a0d851b11564d20022ab11d2589a8
0x132052eb4dd19f1ec522859e12d89706156570f8fbab1824870bc6f8c7d235eef5f4
The fields for this multihash are - hashing function: sha2-512 (0x13), length: 32 (0x20), digest: 0x52eb4dd19f1ec522859e12d89706156570f8fbab1824870bc6f8c7d235eef5f4
0x134052eb4dd19f1ec522859e12d89706156570f8fbab1824870bc6f8c7d235eef5f4c2cbbafd365f96fb12b1d98a0334870c2ce90355da25e6a1108a6e17c4aaebb0
The fields for this multihash are - hashing function: sha2-512 (0x13), length: 64 (0x40), digest: 0x52eb4dd19f1ec522859e12d89706156570f8fbab1824870bc6f8c7d235eef5f4c2cbbafd365f96fb12b1d98a0334870c2ce90355da25e6a1108a6e17c4aaebb0
0xb24040d91ae0cb0e48022053ab0f8f0dc78d28593d0f1c13ae39c9b169c136a779f21a0496337b6f776a73c1742805c1cc15e792ddb3c92ee1fe300389456ef3dc97e2
The fields for this multihash are - hashing function: blake2b-512 (0xb240), length: 64 (0x40), digest: 0xd91ae0cb0e48022053ab0f8f0dc78d28593d0f1c13ae39c9b169c136a779f21a0496337b6f776a73c1742805c1cc15e792ddb3c92ee1fe300389456ef3dc97e2
0xb220207d0a1371550f3306532ff44520b649f8be05b72674e46fc24468ff74323ab030
The fields for this multihash are - hashing function: blake2b-256 (0xb220), length: 32 (0x20), digest: 0x7d0a1371550f3306532ff44520b649f8be05b72674e46fc24468ff74323ab030
0xb26020a96953281f3fd944a3206219fad61a40b992611b7580f1fa091935db3f7ca13d
The fields for this multihash are - hashing function: blake2s-256 (0xb260), length: 32 (0x20), digest: 0xa96953281f3fd944a3206219fad61a40b992611b7580f1fa091935db3f7ca13d
0xb250100a4ec6f1629e49262d7093e2f82a3278
The fields for this multihash are - hashing function: blake2s-128 (0xb250), length: 16 (0x10), digest: 0x0a4ec6f1629e49262d7093e2f82a3278
The editors would like to thank the following individuals for feedback on and implementations of the specification (in alphabetical order).
The Multihash Identifier Registry contains hash functions supported by Multihash each with its canonical name, its value in hexadecimal notation, and its status. The following initial entries should be added to the registry to be created and maintained at (the suggested URI) http://www.iana.org/assignments/multihash-identifiers:
Name | Identifier | Status | Specification |
---|---|---|---|
identity | 0x00 | active | Unknown |
sha1 | 0x11 | active | RFC 6234 |
sha2-256 | 0x12 | active | RFC 6234 |
sha2-512 | 0x13 | active | RFC 6234 |
sha3-512 | 0x14 | active | Unknown |
sha3-384 | 0x15 | active | Unknown |
sha3-256 | 0x16 | active | Unknown |
sha3-224 | 0x17 | active | Unknown |
shake-128 | 0x18 | active | Unknown |
shake-256 | 0x19 | active | Unknown |
keccak-224 | 0x1a | active | Unknown |
keccak-256 | 0x1b | active | Unknown |
keccak-384 | 0x1c | active | Unknown |
keccak-512 | 0x1d | active | Unknown |
blake3 | 0x1e | active | Unknown |
murmur3-128 | 0x22 | active | Unknown |
murmur3-32 | 0x23 | active | Unknown |
dbl-sha2-256 | 0x56 | active | Unknown |
md4 | 0xd4 | deprecated | RFC 6150 |
md5 | 0xd5 | deprecated | RFC 6151 |
bmt | 0xd6 | active | Unknown |
sha2-256-trunc254-padded | 0x1012 | active | RFC 6234 |
ripemd-128 | 0x1052 | active | Unknown |
ripemd-160 | 0x1053 | active | Unknown |
ripemd-256 | 0x1054 | active | Unknown |
ripemd-320 | 0x1055 | active | Unknown |
x11 | 0x1100 | active | Unknown |
sm3-256 | 0x534d | active | Unknown |
blake2b-8 | 0xb201 | active | RFC 7693 |
blake2b-16 | 0xb202 | active | RFC 7693 |
blake2b-24 | 0xb203 | active | RFC 7693 |
blake2b-32 | 0xb204 | active | RFC 7693 |
blake2b-40 | 0xb205 | active | RFC 7693 |
blake2b-48 | 0xb206 | active | RFC 7693 |
blake2b-56 | 0xb207 | active | RFC 7693 |
blake2b-64 | 0xb208 | active | RFC 7693 |
blake2b-72 | 0xb209 | active | RFC 7693 |
blake2b-80 | 0xb20a | active | RFC 7693 |
blake2b-88 | 0xb20b | active | RFC 7693 |
blake2b-96 | 0xb20c | active | RFC 7693 |
blake2b-104 | 0xb20d | active | RFC 7693 |
blake2b-112 | 0xb20e | active | RFC 7693 |
blake2b-120 | 0xb20f | active | RFC 7693 |
blake2b-128 | 0xb210 | active | RFC 7693 |
blake2b-136 | 0xb211 | active | RFC 7693 |
blake2b-144 | 0xb212 | active | RFC 7693 |
blake2b-152 | 0xb213 | active | RFC 7693 |
blake2b-160 | 0xb214 | active | RFC 7693 |
blake2b-168 | 0xb215 | active | RFC 7693 |
blake2b-176 | 0xb216 | active | RFC 7693 |
blake2b-184 | 0xb217 | active | RFC 7693 |
blake2b-192 | 0xb218 | active | RFC 7693 |
blake2b-200 | 0xb219 | active | RFC 7693 |
blake2b-208 | 0xb21a | active | RFC 7693 |
blake2b-216 | 0xb21b | active | RFC 7693 |
blake2b-224 | 0xb21c | active | RFC 7693 |
blake2b-232 | 0xb21d | active | RFC 7693 |
blake2b-240 | 0xb21e | active | RFC 7693 |
blake2b-248 | 0xb21f | active | RFC 7693 |
blake2b-256 | 0xb220 | active | RFC 7693 |
blake2b-264 | 0xb221 | active | RFC 7693 |
blake2b-272 | 0xb222 | active | RFC 7693 |
blake2b-280 | 0xb223 | active | RFC 7693 |
blake2b-288 | 0xb224 | active | RFC 7693 |
blake2b-296 | 0xb225 | active | RFC 7693 |
blake2b-304 | 0xb226 | active | RFC 7693 |
blake2b-312 | 0xb227 | active | RFC 7693 |
blake2b-320 | 0xb228 | active | RFC 7693 |
blake2b-328 | 0xb229 | active | RFC 7693 |
blake2b-336 | 0xb22a | active | RFC 7693 |
blake2b-344 | 0xb22b | active | RFC 7693 |
blake2b-352 | 0xb22c | active | RFC 7693 |
blake2b-360 | 0xb22d | active | RFC 7693 |
blake2b-368 | 0xb22e | active | RFC 7693 |
blake2b-376 | 0xb22f | active | RFC 7693 |
blake2b-384 | 0xb230 | active | RFC 7693 |
blake2b-392 | 0xb231 | active | RFC 7693 |
blake2b-400 | 0xb232 | active | RFC 7693 |
blake2b-408 | 0xb233 | active | RFC 7693 |
blake2b-416 | 0xb234 | active | RFC 7693 |
blake2b-424 | 0xb235 | active | RFC 7693 |
blake2b-432 | 0xb236 | active | RFC 7693 |
blake2b-440 | 0xb237 | active | RFC 7693 |
blake2b-448 | 0xb238 | active | RFC 7693 |
blake2b-456 | 0xb239 | active | RFC 7693 |
blake2b-464 | 0xb23a | active | RFC 7693 |
blake2b-472 | 0xb23b | active | RFC 7693 |
blake2b-480 | 0xb23c | active | RFC 7693 |
blake2b-488 | 0xb23d | active | RFC 7693 |
blake2b-496 | 0xb23e | active | RFC 7693 |
blake2b-504 | 0xb23f | active | RFC 7693 |
blake2b-512 | 0xb240 | active | RFC 7693 |
blake2s-8 | 0xb241 | active | RFC 7693 |
blake2s-16 | 0xb242 | active | RFC 7693 |
blake2s-24 | 0xb243 | active | RFC 7693 |
blake2s-32 | 0xb244 | active | RFC 7693 |
blake2s-40 | 0xb245 | active | RFC 7693 |
blake2s-48 | 0xb246 | active | RFC 7693 |
blake2s-56 | 0xb247 | active | RFC 7693 |
blake2s-64 | 0xb248 | active | RFC 7693 |
blake2s-72 | 0xb249 | active | RFC 7693 |
blake2s-80 | 0xb24a | active | RFC 7693 |
blake2s-88 | 0xb24b | active | RFC 7693 |
blake2s-96 | 0xb24c | active | RFC 7693 |
blake2s-104 | 0xb24d | active | RFC 7693 |
blake2s-112 | 0xb24e | active | RFC 7693 |
blake2s-120 | 0xb24f | active | RFC 7693 |
blake2s-128 | 0xb250 | active | RFC 7693 |
blake2s-136 | 0xb251 | active | RFC 7693 |
blake2s-144 | 0xb252 | active | RFC 7693 |
blake2s-152 | 0xb253 | active | RFC 7693 |
blake2s-160 | 0xb254 | active | RFC 7693 |
blake2s-168 | 0xb255 | active | RFC 7693 |
blake2s-176 | 0xb256 | active | RFC 7693 |
blake2s-184 | 0xb257 | active | RFC 7693 |
blake2s-192 | 0xb258 | active | RFC 7693 |
blake2s-200 | 0xb259 | active | RFC 7693 |
blake2s-208 | 0xb25a | active | RFC 7693 |
blake2s-216 | 0xb25b | active | RFC 7693 |
blake2s-224 | 0xb25c | active | RFC 7693 |
blake2s-232 | 0xb25d | active | RFC 7693 |
blake2s-240 | 0xb25e | active | RFC 7693 |
blake2s-248 | 0xb25f | active | RFC 7693 |
blake2s-256 | 0xb260 | active | RFC 7693 |
skein256-8 | 0xb301 | active | Unknown |
skein256-16 | 0xb302 | active | Unknown |
skein256-24 | 0xb303 | active | Unknown |
skein256-32 | 0xb304 | active | Unknown |
skein256-40 | 0xb305 | active | Unknown |
skein256-48 | 0xb306 | active | Unknown |
skein256-56 | 0xb307 | active | Unknown |
skein256-64 | 0xb308 | active | Unknown |
skein256-72 | 0xb309 | active | Unknown |
skein256-80 | 0xb30a | active | Unknown |
skein256-88 | 0xb30b | active | Unknown |
skein256-96 | 0xb30c | active | Unknown |
skein256-104 | 0xb30d | active | Unknown |
skein256-112 | 0xb30e | active | Unknown |
skein256-120 | 0xb30f | active | Unknown |
skein256-128 | 0xb310 | active | Unknown |
skein256-136 | 0xb311 | active | Unknown |
skein256-144 | 0xb312 | active | Unknown |
skein256-152 | 0xb313 | active | Unknown |
skein256-160 | 0xb314 | active | Unknown |
skein256-168 | 0xb315 | active | Unknown |
skein256-176 | 0xb316 | active | Unknown |
skein256-184 | 0xb317 | active | Unknown |
skein256-192 | 0xb318 | active | Unknown |
skein256-200 | 0xb319 | active | Unknown |
skein256-208 | 0xb31a | active | Unknown |
skein256-216 | 0xb31b | active | Unknown |
skein256-224 | 0xb31c | active | Unknown |
skein256-232 | 0xb31d | active | Unknown |
skein256-240 | 0xb31e | active | Unknown |
skein256-248 | 0xb31f | active | Unknown |
skein256-256 | 0xb320 | active | Unknown |
skein512-8 | 0xb321 | active | Unknown |
skein512-16 | 0xb322 | active | Unknown |
skein512-24 | 0xb323 | active | Unknown |
skein512-32 | 0xb324 | active | Unknown |
skein512-40 | 0xb325 | active | Unknown |
skein512-48 | 0xb326 | active | Unknown |
skein512-56 | 0xb327 | active | Unknown |
skein512-64 | 0xb328 | active | Unknown |
skein512-72 | 0xb329 | active | Unknown |
skein512-80 | 0xb32a | active | Unknown |
skein512-88 | 0xb32b | active | Unknown |
skein512-96 | 0xb32c | active | Unknown |
skein512-104 | 0xb32d | active | Unknown |
skein512-112 | 0xb32e | active | Unknown |
skein512-120 | 0xb32f | active | Unknown |
skein512-128 | 0xb330 | active | Unknown |
skein512-136 | 0xb331 | active | Unknown |
skein512-144 | 0xb332 | active | Unknown |
skein512-152 | 0xb333 | active | Unknown |
skein512-160 | 0xb334 | active | Unknown |
skein512-168 | 0xb335 | active | Unknown |
skein512-176 | 0xb336 | active | Unknown |
skein512-184 | 0xb337 | active | Unknown |
skein512-192 | 0xb338 | active | Unknown |
skein512-200 | 0xb339 | active | Unknown |
skein512-208 | 0xb33a | active | Unknown |
skein512-216 | 0xb33b | active | Unknown |
skein512-224 | 0xb33c | active | Unknown |
skein512-232 | 0xb33d | active | Unknown |
skein512-240 | 0xb33e | active | Unknown |
skein512-248 | 0xb33f | active | Unknown |
skein512-256 | 0xb340 | active | Unknown |
skein512-264 | 0xb341 | active | Unknown |
skein512-272 | 0xb342 | active | Unknown |
skein512-280 | 0xb343 | active | Unknown |
skein512-288 | 0xb344 | active | Unknown |
skein512-296 | 0xb345 | active | Unknown |
skein512-304 | 0xb346 | active | Unknown |
skein512-312 | 0xb347 | active | Unknown |
skein512-320 | 0xb348 | active | Unknown |
skein512-328 | 0xb349 | active | Unknown |
skein512-336 | 0xb34a | active | Unknown |
skein512-344 | 0xb34b | active | Unknown |
skein512-352 | 0xb34c | active | Unknown |
skein512-360 | 0xb34d | active | Unknown |
skein512-368 | 0xb34e | active | Unknown |
skein512-376 | 0xb34f | active | Unknown |
skein512-384 | 0xb350 | active | Unknown |
skein512-392 | 0xb351 | active | Unknown |
skein512-400 | 0xb352 | active | Unknown |
skein512-408 | 0xb353 | active | Unknown |
skein512-416 | 0xb354 | active | Unknown |
skein512-424 | 0xb355 | active | Unknown |
skein512-432 | 0xb356 | active | Unknown |
skein512-440 | 0xb357 | active | Unknown |
skein512-448 | 0xb358 | active | Unknown |
skein512-456 | 0xb359 | active | Unknown |
skein512-464 | 0xb35a | active | Unknown |
skein512-472 | 0xb35b | active | Unknown |
skein512-480 | 0xb35c | active | Unknown |
skein512-488 | 0xb35d | active | Unknown |
skein512-496 | 0xb35e | active | Unknown |
skein512-504 | 0xb35f | active | Unknown |
skein512-512 | 0xb360 | active | Unknown |
skein1024-8 | 0xb361 | active | Unknown |
skein1024-16 | 0xb362 | active | Unknown |
skein1024-24 | 0xb363 | active | Unknown |
skein1024-32 | 0xb364 | active | Unknown |
skein1024-40 | 0xb365 | active | Unknown |
skein1024-48 | 0xb366 | active | Unknown |
skein1024-56 | 0xb367 | active | Unknown |
skein1024-64 | 0xb368 | active | Unknown |
skein1024-72 | 0xb369 | active | Unknown |
skein1024-80 | 0xb36a | active | Unknown |
skein1024-88 | 0xb36b | active | Unknown |
skein1024-96 | 0xb36c | active | Unknown |
skein1024-104 | 0xb36d | active | Unknown |
skein1024-112 | 0xb36e | active | Unknown |
skein1024-120 | 0xb36f | active | Unknown |
skein1024-128 | 0xb370 | active | Unknown |
skein1024-136 | 0xb371 | active | Unknown |
skein1024-144 | 0xb372 | active | Unknown |
skein1024-152 | 0xb373 | active | Unknown |
skein1024-160 | 0xb374 | active | Unknown |
skein1024-168 | 0xb375 | active | Unknown |
skein1024-176 | 0xb376 | active | Unknown |
skein1024-184 | 0xb377 | active | Unknown |
skein1024-192 | 0xb378 | active | Unknown |
skein1024-200 | 0xb379 | active | Unknown |
skein1024-208 | 0xb37a | active | Unknown |
skein1024-216 | 0xb37b | active | Unknown |
skein1024-224 | 0xb37c | active | Unknown |
skein1024-232 | 0xb37d | active | Unknown |
skein1024-240 | 0xb37e | active | Unknown |
skein1024-248 | 0xb37f | active | Unknown |
skein1024-256 | 0xb380 | active | Unknown |
skein1024-264 | 0xb381 | active | Unknown |
skein1024-272 | 0xb382 | active | Unknown |
skein1024-280 | 0xb383 | active | Unknown |
skein1024-288 | 0xb384 | active | Unknown |
skein1024-296 | 0xb385 | active | Unknown |
skein1024-304 | 0xb386 | active | Unknown |
skein1024-312 | 0xb387 | active | Unknown |
skein1024-320 | 0xb388 | active | Unknown |
skein1024-328 | 0xb389 | active | Unknown |
skein1024-336 | 0xb38a | active | Unknown |
skein1024-344 | 0xb38b | active | Unknown |
skein1024-352 | 0xb38c | active | Unknown |
skein1024-360 | 0xb38d | active | Unknown |
skein1024-368 | 0xb38e | active | Unknown |
skein1024-376 | 0xb38f | active | Unknown |
skein1024-384 | 0xb390 | active | Unknown |
skein1024-392 | 0xb391 | active | Unknown |
skein1024-400 | 0xb392 | active | Unknown |
skein1024-408 | 0xb393 | active | Unknown |
skein1024-416 | 0xb394 | active | Unknown |
skein1024-424 | 0xb395 | active | Unknown |
skein1024-432 | 0xb396 | active | Unknown |
skein1024-440 | 0xb397 | active | Unknown |
skein1024-448 | 0xb398 | active | Unknown |
skein1024-456 | 0xb399 | active | Unknown |
skein1024-464 | 0xb39a | active | Unknown |
skein1024-472 | 0xb39b | active | Unknown |
skein1024-480 | 0xb39c | active | Unknown |
skein1024-488 | 0xb39d | active | Unknown |
skein1024-496 | 0xb39e | active | Unknown |
skein1024-504 | 0xb39f | active | Unknown |
skein1024-512 | 0xb3a0 | active | Unknown |
skein1024-520 | 0xb3a1 | active | Unknown |
skein1024-528 | 0xb3a2 | active | Unknown |
skein1024-536 | 0xb3a3 | active | Unknown |
skein1024-544 | 0xb3a4 | active | Unknown |
skein1024-552 | 0xb3a5 | active | Unknown |
skein1024-560 | 0xb3a6 | active | Unknown |
skein1024-568 | 0xb3a7 | active | Unknown |
skein1024-576 | 0xb3a8 | active | Unknown |
skein1024-584 | 0xb3a9 | active | Unknown |
skein1024-592 | 0xb3aa | active | Unknown |
skein1024-600 | 0xb3ab | active | Unknown |
skein1024-608 | 0xb3ac | active | Unknown |
skein1024-616 | 0xb3ad | active | Unknown |
skein1024-624 | 0xb3ae | active | Unknown |
skein1024-632 | 0xb3af | active | Unknown |
skein1024-640 | 0xb3b0 | active | Unknown |
skein1024-648 | 0xb3b1 | active | Unknown |
skein1024-656 | 0xb3b2 | active | Unknown |
skein1024-664 | 0xb3b3 | active | Unknown |
skein1024-672 | 0xb3b4 | active | Unknown |
skein1024-680 | 0xb3b5 | active | Unknown |
skein1024-688 | 0xb3b6 | active | Unknown |
skein1024-696 | 0xb3b7 | active | Unknown |
skein1024-704 | 0xb3b8 | active | Unknown |
skein1024-712 | 0xb3b9 | active | Unknown |
skein1024-720 | 0xb3ba | active | Unknown |
skein1024-728 | 0xb3bb | active | Unknown |
skein1024-736 | 0xb3bc | active | Unknown |
skein1024-744 | 0xb3bd | active | Unknown |
skein1024-752 | 0xb3be | active | Unknown |
skein1024-760 | 0xb3bf | active | Unknown |
skein1024-768 | 0xb3c0 | active | Unknown |
skein1024-776 | 0xb3c1 | active | Unknown |
skein1024-784 | 0xb3c2 | active | Unknown |
skein1024-792 | 0xb3c3 | active | Unknown |
skein1024-800 | 0xb3c4 | active | Unknown |
skein1024-808 | 0xb3c5 | active | Unknown |
skein1024-816 | 0xb3c6 | active | Unknown |
skein1024-824 | 0xb3c7 | active | Unknown |
skein1024-832 | 0xb3c8 | active | Unknown |
skein1024-840 | 0xb3c9 | active | Unknown |
skein1024-848 | 0xb3ca | active | Unknown |
skein1024-856 | 0xb3cb | active | Unknown |
skein1024-864 | 0xb3cc | active | Unknown |
skein1024-872 | 0xb3cd | active | Unknown |
skein1024-880 | 0xb3ce | active | Unknown |
skein1024-888 | 0xb3cf | active | Unknown |
skein1024-896 | 0xb3d0 | active | Unknown |
skein1024-904 | 0xb3d1 | active | Unknown |
skein1024-912 | 0xb3d2 | active | Unknown |
skein1024-920 | 0xb3d3 | active | Unknown |
skein1024-928 | 0xb3d4 | active | Unknown |
skein1024-936 | 0xb3d5 | active | Unknown |
skein1024-944 | 0xb3d6 | active | Unknown |
skein1024-952 | 0xb3d7 | active | Unknown |
skein1024-960 | 0xb3d8 | active | Unknown |
skein1024-968 | 0xb3d9 | active | Unknown |
skein1024-976 | 0xb3da | active | Unknown |
skein1024-984 | 0xb3db | active | Unknown |
skein1024-992 | 0xb3dc | active | Unknown |
skein1024-1000 | 0xb3dd | active | Unknown |
skein1024-1008 | 0xb3de | active | Unknown |
skein1024-1016 | 0xb3df | active | Unknown |
skein1024-1024 | 0xb3e0 | active | Unknown |
poseidon-bls12_381-a2-fc1 | 0xb401 | active | Unknown |
poseidon-bls12_381-a2-fc1-sc | 0xb402 | active | Unknown |
NOTE: The most up to date place for developers to find the table above is https://github.com/multiformats/multicodec/blob/master/table.csv.
This memo registers the "MH" digest algorithm in the HTTP Digest Algorithm Values registry with the following values:
Digest Algorithm: MH
Description: The multibase-serialized value of a multihash-supported algorithm.
References: this document
Status: standard