TEA-family block cipher from the DarkCrypt Total Commander plugin: round index used directly as the additive constant (no DELTA-derived sum), 8-word (256-bit) key cycled by round index mod 8, 64 rounds. 64-bit block, 256-bit key.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Beginner |
| Inventor | Alexander Myasnikov (DarkCrypt “Zarya” project) |
| Year | 2013 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-rtea.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 32 bytes (256 bits) |
| Block sizes | 8 bytes (64 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Non-standard, unanalyzed construction | TEA-family variant with a linear (non-DELTA) round constant; 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 Rtea — zero key/plaintext
| Field | Value |
|---|---|
key |
0000000000000000000000000000000000000000000000000000000000000000 |
input |
0000000000000000 |
expected |
84a025cf2f126e6f |
Vector 2 — DarkCrypt Rtea — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f |
input |
0001020304050607 |
expected |
dcebdac1481e6e22 |
Vector 3 — DarkCrypt Rtea — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 |
input |
1011121314151617 |
expected |
784ac367c38dc08d |