On Weakly Invertible Semi - input - memory Finite Automata with Delay 2
نویسنده
چکیده
Semi-input-memory finite automata are a generalization of input-memory finite automata by appending an autonomous finite automaton component. This paper gives a decision criterion of weakly invertible semi-input-memory finite automata with delay 2 of which the minimal output weight of length 2 and the sizes of input and output alphabets are identical. The results are used to generate a kind of weakly invertible semi-input-memory finite automata with delay 2 and to give other proofs of results in binary case. In addition, a frame of binary ciphers with delay 2 and bounded propagation is presented.
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