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LOKI97

Australian AES candidate featuring 128-bit blocks with 128/192/256-bit keys. Uses substitution-permutation network with S-boxes based on finite field exponentiation.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Advanced
Inventor	Lawrie Brown, Josef Pieprzyk, Jennifer Seberry
Year	1997
Origin	🇦🇺 Australia
Source	algorithms/block/loki.js

Parameters

Parameter	Supported values
Key sizes	16 bytes (128 bits); 24 bytes (192 bits); 32 bytes (256 bits)
Block sizes	16 bytes (128 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Square Attack	Vulnerable to Square attack on reduced rounds	Educational cipher - not recommended for production use

Documentation

• LOKI97 AES Submission
• LOKI97 Specification
• LOKI Paper

References

• AES Competition Archive
• Brown et al. Design Paper

Test vectors

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

Vector 1 — LOKI97 Educational Test Vector (128-bit key)

Field	Value
key	133457799bbcdff10011223344556677
input	0123456789abcdef0123456789abcdef
expected	120d03198dbf3afd3d7d8614d5531c7b

Vector 2 — LOKI97 All Zeros Educational Test

Field	Value
key	00000000000000000000000000000000
input	00000000000000000000000000000000
expected	1cd98343476374f07e9bddabf83af501

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