JH is a SHA-3 finalist designed by Hongjun Wu. A 1024-bit state is regrouped into 256 four-bit elements and driven through 42 rounds of S-box substitution, a maximum distance separable mixing layer and a permutation. This is the 224-bit variant of the round-three design.
| Property | Value |
|---|---|
| Category | Hash Functions |
| Sub-category | SHA-3 Candidate |
| Security status | Not classified |
| Complexity | Not specified |
| Inventor | Hongjun Wu |
| Year | 2011 |
| Origin | 🇨🇳 China |
| Source | algorithms/hash/jh.js |
| Parameter | Supported values |
|---|---|
| Output sizes | 28 bytes (224 bits) |
| Hash sizes | 28 bytes (224 bits) |
Status: not classified — treat as unverified.
| Issue | Description | Mitigation |
|---|---|---|
| Preimage attacks on reduced rounds | Preimage and semi-free-start results exist against JH cut down to a fraction of its 42 rounds. The full function has no published break, but SHA-3 went to Keccak instead. | — |
7 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — NIST SHA-3 KAT Len=0 - empty message, one combined padding block
| Field | Value |
|---|---|
input |
(empty) |
expected |
2c99df889b019309051c60fecc2bd285a774940e43175b76b2626630 |
Vector 2 — NIST SHA-3 KAT Len=8 - one byte
| Field | Value |
|---|---|
input |
cc |
expected |
f79c791ac9b9d80ec934312d6b26748481198e3ca78ebb01b2c9ca51 |
Vector 3 — NIST SHA-3 KAT Len=504 - 63 bytes, one under the block size
| Field | Value |
|---|---|
input |
f57c64006d9ea761892e145c99df1b24 640883da79d9ed5262859dcda8c3c32e 05b03d984f1ab4a230242ab6b78d368d c5aaa1e6d3498d53371e84b0c1d4ba |
expected |
2cb2a73729a62f69d9af8252189c1dce8c02286314db64ac6111e3d7 |
Vector 4 — NIST SHA-3 KAT Len=512 - 64 bytes, exactly the block size
| Field | Value |
|---|---|
input |
e926ae8b0af6e53176dbffcc2a6b88c6 bd765f939d3d178a9bde9ef3aa131c61 e31c1e42cdfaf4b4dcde579a37e150ef bef5555b4c1cb40439d835a724e2fae7 |
expected |
982a5d2aa039f9c7d5cff3cc8a34c3a0b205892e7c5b09ed68f2cc84 |
Vector 5 — NIST SHA-3 KAT Len=520 - 65 bytes, one over the block size
| Field | Value |
|---|---|
input |
16e8b3d8f988e9bb04de9c96f2627811 c973ce4a5296b4772ca3eefeb80a652b df21f50df79f32db23f9f73d393b2d57 d9a0297f7a2f2e79cfda39fa393df1ac 00 |
expected |
b6261dd52e1bc8869aa8658a310a888840cc9433b46b3e959002b672 |
Vector 6 — NIST SHA-3 KAT Len=1016 - 127 bytes, one under two blocks
| Field | Value |
|---|---|
input |
a62fc595b4096e6336e53fcdfc8d1cc1 75d71dac9d750a6133d23199eaac2882 07944cea6b16d27631915b4619f743da 2e30a0c00bbdb1bbb35ab852ef3b9aec 6b0a8dcc6e9e1abaa3ad62ac0a6c5de7 65de2c3711b769e3fde44a74016fff82 ac46fa8f1797d3b2a726b696e3dea553 0439acee3a45c2a51bc32dd055650b |
expected |
99311ca7952d3970a3435f9d246ab4f6e720a27e5647b8cdbcc54c01 |
Vector 7 — NIST SHA-3 KAT Len=1024 - 128 bytes, an exact multiple of the block size
| Field | Value |
|---|---|
input |
2b6db7ced8665ebe9deb080295218426 bdaa7c6da9add2088932cdffbaa1c141 29bccdd70f369efb149285858d2b1d15 5d14de2fdb680a8b027284055182a0ca e275234cc9c92863c1b4ab66f304cf06 21cd54565f5bff461d3b461bd40df281 98e3732501b4860eadd503d26d6e6933 8f4e0456e9e9baf3d827ae685fb1d817 |
expected |
5e3c00c2c0e126a2e6327aa30db4c3f66052c74cf10cac9c380f5d56 |