1. ring topology ring network Riordans Internet Privacy Enhanced Mail RIPEM A not yet complete, but useful implementation of Privacy Enhanced Mail PEM. RIPEM allows your electronic mail to have the four security facilities provided by PEM: disclosure protection optional, originator authenticity, message integrity measures and non-repudiation of origin always. RIPEM was written primarily by Mark Riordan cl. msu. edu>. Most of the code is in the public domain, except for the RSA routines, which are a library called RSAREF licensed from RSA Data Security, Inc. The current November 1993 version of RIPEM is 1. 1a; the current version of the Macintosh port of RIPEM is 0. 8b1.
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