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REDOC III

Enhanced version of IBM’s REDOC II cipher with 128-bit blocks and 256-bit keys. Features improved security and stronger diffusion compared to REDOC II. Educational implementation only.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Advanced
Inventor	IBM Research
Year	1985
Origin	🇺🇸 United States
Source	algorithms/block/redoc.js

Parameters

Parameter	Supported values
Key sizes	32 bytes (256 bits)
Block sizes	16 bytes (128 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Educational Implementation	Simplified implementation may not capture full security properties of original design	Use only for educational purposes and cryptographic research

Documentation

• IBM Cryptographic Research Publications
• Data-Dependent Cipher Design Papers
• Advanced Cryptography Textbooks

References

• CEX Cryptographic Library
• Academic Research on Experimental Ciphers

Test vectors

1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — REDOC III Enhanced Test Vector

Source: Based on simplified implementation

Field	Value
key	0123456789abcdeffedc98765432101122334455667788990102030405060708
input	123456789abcdef01357bd24680ace02
expected	9f6d56c2affa6003aeaad32e147c2dd6

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