Expires in six months Ascom Systec Ltd. Incorporation of IDEA encryption algorithm in S/MIME

This memo describes how to incorporate the IDEA (International Data Encryption Algorithm) [IDEA] encryption algorithm into S/MIME (Secure/Multipurpose Internet Mail Extensions) [SMIME2, SMIME3]. The S/MIME standard provides a consistent way to send and receive secure MIME [MIME] data. Information security services are implemented on the basis of a set of cryptographic functions. Thus, digital signatures are used for secure authentication, non-repudiation of origin, and data integrity, whereas data encryption is used to assure data security and privacy.