Cryptlib employs the IETF-standardised Cryptographic Message Syntax (CMS, formerly called PKCS #7) format as its native data format. CMS is the underlying format used in the S/MIME secure mail standard, as well as a number of other standards covering secure EDI and related systems like HL7 messaging. As an example of its use in secure EDI, Cryptlib provides security services for the Symphonia EDI messaging toolkit which is used to communicate medical lab reports, patient data, drug prescription information, and similar information requiring a high level of security.
Unlike many other implementations, Cryptlib's RSA- certified S/MIME implementation provides full-strength encryption and signatures (typically 2048-bit RSA combined with triple DES encryption) by default, providing a much higher level of security than the default 40-bit RC2 found in mail software like Netscape and Outlook Express, for which a simple Windows screen saver can break the encryption.
The S/MIME implementation uses Cryptlib's enveloping interface which allows simple, rapid integration of strong encryption and authentication capabilities into existing email agents and messaging software. The resulting signed data format provides message integrity and origin authentication services, the enveloped data format provides confidentiality.
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