NESSIE-era 64-bit block cipher using involutional substitution-permutation structure. Educational reference implementation.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Intermediate |
| Inventor | Paulo S.L.M. Barreto, Vincent Rijmen |
| Year | 2000 |
| Origin | 🇧🇷 Brazil |
| Source | algorithms/block/khazad.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 16 bytes (128 bits) |
| Block sizes | 8 bytes (64 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Reduced-round cryptanalysis | Known attacks on reduced rounds highlight limited security margin. | Use only for educational purposes. |
9 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — DarkCrypt KHAZAD vector 1/zero
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
input |
0000000000000000 |
expected |
2325d00f3e76a22d |
Vector 2 — DarkCrypt KHAZAD vector 2/incr
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
input |
0001020304050607 |
expected |
9c4c292a989175fc |
Vector 3 — DarkCrypt KHAZAD vector 3/incr2
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f10 |
input |
1011121314151617 |
expected |
cb57cca64cd59aff |
Vector 4 — LibTomCrypt Test 0
| Field | Value |
|---|---|
key |
80000000000000000000000000000000 |
input |
0000000000000000 |
expected |
49a4ce32ac190e3f |
Vector 5 — LibTomCrypt Test 1
| Field | Value |
|---|---|
key |
00000000000000000000000000000001 |
input |
0000000000000000 |
expected |
645d773e40abdd53 |
Vector 6 — LibTomCrypt Test 2
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
input |
8000000000000000 |
expected |
9e399864f78eca02 |
Vector 7 — LibTomCrypt Test 3
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
input |
0000000000000001 |
expected |
a9df3d2c64d3ea28 |
Vector 8 — NESSIE Khazad-Tweaked verified vectors - repeating 0x08
| Field | Value |
|---|---|
key |
08080808080808080808080808080808 |
input |
0808080808080808 |
expected |
a0e07b8baa41e898 |
Vector 9 — NESSIE Khazad-Tweaked verified vectors - set 8
| Field | Value |
|---|---|
key |
2bd6459f82c5b300952c49104881ff48 |
input |
39b746a9117f5e6c |
expected |
ea024714ad5c4d84 |