## Bounded delay L codes.(English)Zbl 0735.68051

A code is a morphism $$h$$. The code obtained by applying $$h$$ to the first letter of the plaintext, $$h^ 2$$ to the second letter, $$h^ 3$$ to the third letter, and so on, is referred to as $$L$$-code. A code being of bounded delay means the existence of a constant $$k$$ such that the first $$k$$ letters of the cryptotext uniquely determine the first letter of the plaintext. Three notions of bounded $$L$$ codes are investigated, their relations with ordinary codes are established.
Reviewer: G.Jumarie

### MSC:

 68Q45 Formal languages and automata 68Q70 Algebraic theory of languages and automata 94A60 Cryptography 20M35 Semigroups in automata theory, linguistics, etc.

### Keywords:

bounded delay codes; L-code
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### References:

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