Generalized-Feistel block cipher from the DarkCrypt Total Commander plugin: RC5/RC6-style S-box-driven key schedule feeding an RC4-permuted subkey table, 64 rounds mixing modular multiplication (mod 2^32-1) with an XOR diffusion network. 128-bit block, 512-bit key. No public specification exists.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Expert |
| Inventor | Alexander Myasnikov (DarkCrypt / “Zarya” project) |
| Year | 2009 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-vemokwana.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 64 bytes (512 bits) |
| Block sizes | 16 bytes (128 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Non-standard, unanalyzed design | Custom generalized-Feistel construction with no public cryptanalysis; 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 Vemokwana — zero key/plaintext
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 |
input |
00000000000000000000000000000000 |
expected |
0c45790a79707fd5fcf1d880c8899b29 |
Vector 2 — DarkCrypt Vemokwana — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f |
input |
000102030405060708090a0b0c0d0e0f |
expected |
1b293690e9710673d59f19df54c25564 |
Vector 3 — DarkCrypt Vemokwana — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f10 1112131415161718191a1b1c1d1e1f20 2122232425262728292a2b2c2d2e2f30 3132333435363738393a3b3c3d3e3f40 |
input |
101112131415161718191a1b1c1d1e1f |
expected |
b82a0b5215332c45eae0ec930a792603 |