Hawkynt

LILI-128 (DarkCrypt)

Clock-controlled LFSR keystream generator matching the public LILI-128 design (Simpson/Dawson/Golic/Millan, SAC 2000): a 39-bit LFSRc irregularly clocks an 89-bit LFSRd (1-4 times per bit) whose taps drive a 1024-entry nonlinear Boolean function.

Properties

Property	Value
Category	Stream Ciphers
Sub-category	Stream Cipher
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	Simpson, Dawson, Golic, Millan (base LILI-128 design); DarkCrypt port by Alexander Myasnikov
Year	2000
Origin	🇦🇺 Australia
Source	algorithms/stream/darkcrypt-lili.js

Parameters

Parameter	Supported values
Key sizes	16 bytes (128 bits)
Block sizes	1 byte (8 bits) to 65536 bytes (524288 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Known cryptanalytic attacks	LILI-128 is subject to published distinguishing and algebraic attacks; not recommended for real use.	Use a vetted stream cipher.

Documentation

• DarkCrypt plugin (Total Commander PlugRing)
• LILI Keystream Generator (SAC 2000 paper)

Test vectors

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

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

Field	Value
key	000102030405060708090a0b0c0d0e0f
input	00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000
expected	612cca9a6cd85262a7232e4e636bb125 91244ada79631ed367c0c09422bbe454 9bb92dea46bb75096c01d8a2ff3c2444 ed5389894c6e738ca710ce03aeb52473 063f554bfb63ce58d6b0a7c651276e8d c2210c73ef0737035d863658ec874953 5c87c9338412bf8b16f2228cd54317c2 a0be7f888b995cc88ec7fae592ffd044

Vector 2 — DarkCrypt Lili — incrementing key/plaintext

Field	Value
key	000102030405060708090a0b0c0d0e0f
input	000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
expected	612dc89968dd5465af2a24456f66bf2a 813558c96d7608c47fd9da8f3ea6fa4b bb980fc9629e532e4428f289d3110a6b dd62bbba785b45bb9f29f43892881a4c

---

← All algorithms

This site is open source. Improve this page.