Hierocrypt-L1, Toshiba’s NESSIE-submission nested-SPN block cipher (64-bit block, 128-bit key, 6 rounds, turning point 4), as used by the DarkCrypt Total Commander plugin. Validated against Toshiba’s official specification.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Advanced |
| Inventor | Toshiba Corporation; DarkCrypt integration by Alexander Myasnikov |
| Year | 2000 |
| Origin | 🇯🇵 Japan |
| Source | algorithms/block/darkcrypt-hierocrypt-l1.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 16 bytes (128 bits) |
| Block sizes | 8 bytes (64 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Not selected by NESSIE | Hierocrypt-L1 was submitted to NESSIE but not selected for the final portfolio; cryptanalysis is comparatively limited. | Use AES or another vetted, widely analyzed cipher. |
3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — DarkCrypt Hierocrypt-L1 — zero key/plaintext
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
input |
0000000000000000 |
expected |
3ccc94b801fbf16d |
Vector 2 — DarkCrypt Hierocrypt-L1 — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
input |
0001020304050607 |
expected |
ac9260e52fba69a7 |
Vector 3 — DarkCrypt Hierocrypt-L1 — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f10 |
input |
1011121314151617 |
expected |
08696d47f38c17d6 |