Hawkynt

ICE

Information Concealment Engine with configurable rounds (Thin-ICE: 8 rounds, ICE: 16 rounds). 64-bit Feistel block cipher with key-dependent S-boxes designed by Matthew Kwan.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	Matthew Kwan
Year	1997
Origin	🇦🇺 Australia
Source	algorithms/block/ice.js

Parameters

Parameter	Supported values
Key sizes	8 bytes (64 bits)
Block sizes	8 bytes (64 bits)

Security

Status: 🎓 Educational Only

No vulnerabilities are recorded for this implementation.

Documentation

• ICE Algorithm Specification
• ICE Home Page
• Fast Software Encryption 1997 Paper

References

• Original C Implementation
• ICE Algorithm Overview

Test vectors

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

Vector 1 — Thin-ICE (8 rounds) Official Test Vector

Field	Value
rounds	8
key	deadbeef01234567
input	fedcba9876543210
expected	de240d83a00a9cc0

Vector 2 — ICE (16 rounds) Official Test Vector

Field	Value
rounds	16
key	deadbeef01234567
input	fedcba9876543210
expected	7d6ef1ef30d47a96

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