Hawkynt

Konton (DarkCrypt)

512-bit-key table-driven ARX stream cipher from the DarkCrypt Total Commander plugin. A 32-word table is derived from the key, then walked once per keystream step with data-dependent rotations and an additive accumulator carrying self-synchronizing plaintext feedback.

Properties

Property Value
Category Stream Ciphers
Sub-category Stream Cipher
Security status 🎓 Educational Only
Complexity Advanced
Inventor Alexander Myasnikov (“Zarya” project)
Year 2013
Origin 🇷🇺 Russia
Source algorithms/stream/darkcrypt-konton.js

Parameters

Parameter Supported values
Key sizes 64 bytes (512 bits)
Block sizes 1 byte (8 bits) to 65536 bytes (524288 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue Description Mitigation
Unanalyzed construction Custom, unpublished ARX stream cipher with no public cryptanalysis; not recommended for real use. Use a vetted stream cipher.

Documentation

Test vectors

2 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — DarkCrypt Konton — keystream from incrementing key, zero input

Field Value
key 000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
input 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000
expected ed614f35b2ddde567d95866172815adf ba2f3570e61050217724813effb578a2 3c29ce5c8359c7f649882b5eedfd3369 4fc0423bffb930c4b04484789eb203b3 cd98b3492d3691d8805ddc0251bac134 e1e72e98b3037aab296b8be130f1204d 542073d0b80d43bafadefc6e150159e9 663ed853cbf0b5e300a08ca480cc8ac7

Vector 2 — DarkCrypt Konton — incrementing key/plaintext

Field Value
key 000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
input 000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
expected ed604be3f76e28959ef8361a20fcbbe0 ecc3d436c600f2c070620c1035ed15e2 6f6c4ff21a3cfd5b6039e5afa6f76fce 47557730b5a8298395fe083915e8000b

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