In Kari's proposal, the cellular automaton rule would be the encryption key, encryption would be performed by running the rule forward one step, and decryption would be performed by running it backward one step.
The cellular automaton rule would be the encryption key, encryption would be performed by running the rule forward one step. This was in Kari's proposal. The cellular automaton rule would be the encryption key, decryption would be performed by running it backward one step. This was in Kari's proposal.