It is the task of the following invention to indicate a method for the construction of a class of one way-functions. One-way functions are fundamental tools for cryptography, personal identification, authentication, universal hashing and other data security applications (i.e. the password-problem). Beside the use for authentication, the implementation of one-way functions in conditional access systems and payment systems is possible. For Internet applications the one-way functions can be used for generate session-IDs.
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