rfc3058 - Network Working Group S. Teiwes Request for...

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Network Working Group S. Teiwes Request for Comments: 3058 P. Hartmann Category:Informational iT_Security AG (Ltd.) D. Kuenzi 724 Solutions Inc. February 2001 Use of the IDEA Encryption Algorithm in CMS Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract This memo specifies how to incorporate International Data Encryption Algorithm (IDEA) into CMS or S/MIME as an additional strong algorithm for symmetric encryption. For organizations who make use of IDEA for data security purposes it is of high interest that IDEA is also available in S/MIME. The intention of this memo is to provide the OIDs and algorithms required that IDEA can be included in S/MIME for symmetric content and key encryption. 1. Introduction This memo specifies how to incorporate International Data Encryption Algorithm (IDEA) [IDEA] into CMS or S/MIME [SMIME2, SMIME3] as an additional strong algorithm for symmetric encryption. For organizations who make use of IDEA for data security purposes it is of high interest that IDEA is also available in S/MIME. The intention of this memo is to provide the OIDs and algorithms required that IDEA can be included in S/MIME for symmetric content and key encryption. The general functional capabilities and preferences of S/MIME are specified by the registered list of S/MIME object identifiers (OIDs). This list of OIDs is available from the Internet Mail Consortium at <http://www.imc.org/ietf-smime/oids.html>. The set of S/MIME functions provided by a client is expressed by the S/MIME capabilities attribute. This attribute contains a list of OIDs of supported cryptographic functions. Teiwes, et al. Informational [Page 1]
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RFC 3058 IDEA Encryption Algorithm in CMS February 2001 In this document, the terms MUST, MUST NOT, SHOULD, and SHOULD NOT are used in capital letters. This conforms to the definitions in [MUSTSHOULD]. 2. Object Identifier for Content and Key Encryption The Cryptographic Message Syntax [CMS], derived from PKCS#7 [PKCS7], is the framework for the implementation of cryptographic functions in S/MIME. It specifies data formats and encryption processes without naming the cryptographic algorithms. Each algorithm which is used for encryption purposes must be specified by a unique algorithm identifier. For example, in the special case of content encryption the ContentEncryptionAlgorithmIdentifier specifies the algorithm to be applied. However, according to [CMS] any symmetric encryption algorithm that a CMS implementation includes as a content-encryption algorithm must also be included as a key-encryption algorithm. IDEA is added to the set of optional symmetric encryption algorithms
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This note was uploaded on 09/13/2009 for the course EE 6345 taught by Professor Cantrell during the Spring '09 term at University of Texas at Dallas, Richardson.

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rfc3058 - Network Working Group S. Teiwes Request for...

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