Skein-512 in keyed mode for message authentication. Uses Skein’s native UBI framework with KEY block processing for secure MAC generation. Supports variable-length keys and output.
| Property | Value |
|---|---|
| Category | Message Authentication |
| Sub-category | Hash-based MAC |
| Security status | 🎓 Educational Only |
| Complexity | Advanced |
| Inventor | Bruce Schneier, Niels Ferguson, Stefan Lucks, Doug Whiting, Mihir Bellare, Tadayoshi Kohno, Jon Callas, Jesse Walker |
| Year | 2008 |
| Origin | 🇺🇸 United States |
| Source | algorithms/mac/skeinmac512.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 1 byte (8 bits) to 256 bytes (2048 bits) |
| Output sizes | 64 bytes (512 bits) |
| Flag | Value |
|---|---|
NeedsKey |
Yes |
Status: 🎓 Educational Only
No vulnerabilities are recorded for this implementation.
9 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — Skein-512-MAC Official Test Vector - empty message
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 935df3061ff06e9f204192ba11e5bb2c ac0430c1c370cb3d113fea5ec1021eb8 75e5946d7a96ac69a1626c6206b72527 36f24253c9ee9b85eb852dfc81463134 6c |
input |
(empty) |
expected |
9bd43d2a2fcfa92becb9f69faab39369 78f1b865b7e44338fc9c8f16aba949ba 340291082834a1fc5aa81649e13d50cd 98641a1d0883062bfe2c16d1faa7e3aa |
Vector 2 — Skein-512-MAC Official Test Vector - 1 byte (0xd3)
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 |
input |
d3 |
expected |
f0c0a10f031c8fc69cfabcd54154c318 b5d6cd95d06b12cf20264402492211ee 010d5cecc2dc37fd772afac0596b2bf7 1e6020ef2dee7c860628b6e643ed9ff6 |
Vector 3 — Skein-512-MAC Official Test Vector - 8 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf847a0d315cb2e53ff8bac41da0002672e |
input |
d3090c72167517f7 |
expected |
0c1f1921253dd8e5c2d4c5f4099f8510 42d91147892705829161f5fc64d89785 226eb6e187068493ee4c78a4b7c0f55a 8cbbb1a5982c2daf638fc6a74b16b0d7 |
Vector 4 — Skein-512-MAC Official Test Vector - 16 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 |
input |
d3090c72167517f7c7ad82a70c2fd3f6 |
expected |
478d7b6c0cc6e35d9ebbdedf39128e5a 36585db6222891692d1747d401de34ce 3db6fcbab6c968b7f2620f4a844a2903 b547775579993736d2493a75ff6752a1 |
Vector 5 — Skein-512-MAC Official Test Vector - 24 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 93 |
input |
d3090c72167517f7c7ad82a70c2fd3f6443f608301591e59 |
expected |
13c170bac1de35e5fb843f65fabecf21 4a54a6e0458a4ff6ea5df91915468f4e fcd371effa8965a9e82c5388d8473049 0dcf3976af157b8baf550655a5a6ab78 |
Vector 6 — Skein-512-MAC Official Test Vector - 48 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 |
input |
d3090c72167517f7c7ad82a70c2fd3f6 443f608301591e598eadb195e8357135 ba26fede2ee187417f816048d00fc235 |
expected |
a947812529a72fd3b8967ec391b298be e891babc8487a1ec4ea3d88f6b2b5be0 9ac6a780f30f8e8c3bbb4f18bc302a28 f3e87d170ba0f858a8fefe3487478cca |
Vector 7 — Skein-512-MAC Official Test Vector - 64 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 935df3061ff06e9f204192ba11e5bb2c ac0430c1c370cb3d113fea5ec1021eb8 75e5946d7a96ac69a1626c6206b72527 36f24253c9ee9b85eb852dfc81463134 6c |
input |
d3090c72167517f7c7ad82a70c2fd3f6 443f608301591e598eadb195e8357135 ba26fede2ee187417f816048d00fc235 12737a2113709a77e4170c49a94b7fdf |
expected |
7690ba61f10e0bba312980b0212e6a9a 51b0e9aadfde7ca535754a706e042335 b29172aae29d8bad18efaf92d43e6406 f3098e253f41f2931eda5911dc740352 |
Vector 8 — Skein-512-MAC Official Test Vector - 96 bytes
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf847a0d315cb2e53ff8bac41da0002672e |
input |
d3090c72167517f7c7ad82a70c2fd3f6 443f608301591e598eadb195e8357135 ba26fede2ee187417f816048d00fc235 12737a2113709a77e4170c49a94b7fdf f45ff579a72287743102e7766c35ca5a bc5dfe2f63a1e726ce5fbd2926db03a2 |
expected |
d10e3ba81855ac087fbf5a3bc1f99b27 d05f98ba22441138026225d34a418b93 fd9e8dfaf5120757451adabe050d0eb5 9d271b0fe1bbf04badbcf9ba25a8791b |
Vector 9 — Skein-512-MAC Official Test Vector - 128 bytes, exactly two blocks
| Field | Value |
|---|---|
key |
cb41f1706cde09651203c2d0efbaddf8 47a0d315cb2e53ff8bac41da0002672e 920244c66e02d5f0dad3e94c42bb65f0 d14157decf4105ef5609d5b0984457c1 |
input |
d3090c72167517f7c7ad82a70c2fd3f6 443f608301591e598eadb195e8357135 ba26fede2ee187417f816048d00fc235 12737a2113709a77e4170c49a94b7fdf f45ff579a72287743102e7766c35ca5a bc5dfe2f63a1e726ce5fbd2926db03a2 dd18b03fc1508a9aac45eb362440203a 323e09edee6324ee2e37b4432c1867ed |
expected |
04d8cddb0ad931d54d195899a0946843 44e902286037272890bce98a41813edc 37a3cee190a693fcca613ee30049ce7e c2bdff9613f56778a13f8c28a21d167a |