دانلود کتاب On Linear Finite Automata and Cryptography

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Доклад. Technical Report Series: DCC-2011-
11. Departamento de Ciencia de Computadores.Finite automata public-key cryptosystems rely upon characterizations of some types of invertible finite automata, and methods of obtain them as well as their respective inverses. In this paper we provide a much needed clarification of Tao’s formalization and basic results on the subject, as well as a new condition for a linear finite automata with memory to be weakly invertible with delay τ . This last result, employing an approach with formal series, uses the Smith’s normal form of a polynomial matrix. The proof of the results presented here provides a new way to construct an inverse with delay τ of an invertible linear finite automata.