Panama Variant
Panama variants are improved schemes based on the Panama stream cipher/hash design; the original Panama was proposed by Daemen and Clavier.
Purpose
Researches improvements to the Panama structure to fix known collision weaknesses — precursor research to the sponge construction.
Mechanism
State of 8×32-bit words, 17 rounds of θ/π/γ/σ permutation mixed with a message buffer. The original Panama was found to have collision weaknesses; variant research improves the permutation and buffer interaction.
Use cases
- Hash design research
- Sponge construction precursor
- Stream cipher hashing