TIS SPYRUS TIS This document provides definitions, formats, references, and citations for cryptographic algorithms, usage modes, and associated identifiers and parameters used in support of the FORTEZZA suite of cryptographic algorithms with Privacy Enhanced Mail (PEM) [4,5] and MIME Object Security Services (MOSS) [10]. This document is organized in the same manner as RFC 1423 [5]. It is divided into four primary sections, dealing with message encryption algorithms, message integrity check algorithms, symmetric key management algorithms, and asymmetric key management algorithms (including both asymmetric encryption and asymmetric signature algorithms).