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Four kinds of sequences generated by single cycle triangular function(T-function)are investigated to check the possibility for a single cycle T-function to be a cryptographic component in stream ciphers.Based on the special properties of single cycle T-function and an algorithm due to Wei,linear complexities of these four kinds of sequence are all acquired.The results show that single cycle T-function sequences have high linear complexity.Therefore,T-function satisfies the essential requirements being a basic component of stream cipher.
Four kinds of sequences generated by single cycle triangular function (T-function) are investigated to check the possibility for a single cycle T-function to be cryptographic component in stream ciphers. Based on the special properties of single cycle T-function and an algorithm due to Wei, linear complexities of these four kinds of sequences are all acquired. The results show that single cycle T-function sequences have high linear complexity.Therefore, T-function solutions is the essential requirements being a basic component of stream cipher.