Obscure block cipher from the DarkCrypt Total Commander plugin with no known public specification. An unbalanced 16-round Feistel network over two 64-bit halves in a custom GF(2^8) field, using a key-derived 8x8 linear mixing matrix and a fixed S-box.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Advanced |
| Inventor | Alexander Myasnikov (DarkCrypt / Zarya project) |
| Year | 2013 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-tc18.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 8 bytes (64 bits) |
| Block sizes | 16 bytes (128 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Undocumented/unanalyzed design | No public cryptanalysis exists for this cipher; it should not be relied upon for security. | Use AES or another vetted, publicly analyzed cipher. |
2 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — DarkCrypt Tc18 — incrementing key, zero plaintext
| Field | Value |
|---|---|
key |
0001020304050607 |
input |
00000000000000000000000000000000 |
expected |
65829deea528d2376f6ef89d5d4f7135 |
Vector 2 — DarkCrypt Tc18 — incrementing key, incrementing plaintext
| Field | Value |
|---|---|
key |
0001020304050607 |
input |
000102030405060708090a0b0c0d0e0f |
expected |
479e3a9947168262855b5719a8dbc382 |