Cryptography Portal

The Cryptographic Message Syntax (CMS) is the IETF's standard for cryptographic protected messages. It can be used to digitally sign, digest, authenticate or encrypt any form of digital data. Image File history File links Key-crypto-sideways. ... The Internet Engineering Task Force (IETF) is charged with developing and promoting Internet standards. ... Cryptography (from Greek kryptós, hidden, and gráphein, to write) is, traditionally, the study of means of converting information from its normal, comprehensible form into an incomprehensible format, rendering it unreadable without secret knowledge — the art of encryption. ... Digital signature is a term with confusing reference. ... In cryptography, a cryptographic hash function is a hash function with certain additional security properties to make it suitable for use as a primitive in various information security applications, such as authentication and message integrity. ... A cryptographic message authentication code (MAC) is a short piece of information used to authenticate a message. ... // In cryptography, encryption is the process of obscuring information to make it unreadable without special knowledge. ...

CMS is based on the syntax of PKCS#7, which in turn is based on the Privacy-Enhanced Mail standard. The newest version of CMS (as of 2004) is specified in RFC 3852. In cryptography, PKCS refers to a group of Public Key Cryptography Standards devised and published by RSA laboratories in California. ... In cryptography, Privacy-enhanced Electronic Mail, or Privacy Enhanced Mail (PEM), is a technique for exchanging electronic mail over a public medium securely. ... 2004 is a leap year starting on Thursday of the Gregorian calendar. ...

The architecture of CMS is built around certificate-based key management, such as the profile defined by the PKIX working group. In cryptography, X.509 is an ITU-T standard for public key infrastructure (PKI). ... The Public-Key Infrastructure X.509 group, or PKIX, is a working group of the Internet Engineering Task Force dedicated to creating RFCs and other standards documentation on issues related public key infrastructure (PKI) based on X.509 certificates. ... Wikipedia does not have an article with this exact name. ...

CMS is used as the key cryptographic component of many other cryptographic standards, such as S/MIME, PKCS#12 and the RFC 3161 Digital timestamping protocol. S/MIME (Secure / Multipurpose Internet Mail Extensions) is a standard for public key encryption and signing of e-mail encapsulated in MIME. // S/MIME was originally developed by RSA Data Security Inc. ... In cryptography, PKCS refers to a group of Public Key Cryptography Standards devised and published by RSA laboratories in California. ... Digital timestamping is the process of securely keeping track of the creation and modification time of a document. ...

External Links

• Enterprise Trust Integration and Web Services Security standars
• Safelayer KeyOne (Vendor implementation)