March 2003
Intermediate to advanced
312 pages
7h 12m
English
Content preview from HTTP Developer’s Handbook
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Cryptographic Message Syntax
Cryptographic Message Syntax, CMS, is basically a message format for cryptographically securing data. Secure HTTP integrates the CMS format with standard HTTP to achieve much of its strength. The CMS specification is RFC 2630, and this specification is a good resource for exploring the format further.
Secure HTTP uses two of the available content types in CMS:
EnvelopedData SignedData
EnvelopedData is basically encrypted data that is contained within a wrapper. The data itself is encrypted using symmetric key cryptography. Although the specification allows for several methods of distributing the symmetric key, the most popular method (as with SSL) is asymmetric cryptography, most often called public key cryptography. ...
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