Lucifer variant from the DarkCrypt Total Commander plugin: 128-bit block, 128-bit key, 16-round Feistel network with a data/key-dependent interchange bit selecting between two byte-substitution tables per round, and a fixed bit-level diffusion permutation.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Intermediate |
| Inventor | Horst Feistel, Don Coppersmith (base Lucifer); DarkCrypt variant by Alexander Myasnikov |
| Year | 2013 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-lucifer.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 16 bytes (128 bits) |
| Block sizes | 16 bytes (128 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Non-standard variant | DarkCrypt-specific key schedule and S-box/permutation tables; unanalyzed and not recommended for real use. | Use AES or another vetted cipher. |
3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — DarkCrypt Lucifer — zero key/plaintext
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
input |
00000000000000000000000000000000 |
expected |
6161616161616161c4c4c4c4c4c4c4c4 |
Vector 2 — DarkCrypt Lucifer — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
input |
000102030405060708090a0b0c0d0e0f |
expected |
eac9ad3fbcad4fadbb6351a881169755 |
Vector 3 — DarkCrypt Lucifer — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f10 |
input |
101112131415161718191a1b1c1d1e1f |
expected |
d4e265cd01b3b803b75efc1b0bda4a8b |