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S/MIME is a standard for signing and encrypting e-mail. It conforms to the following RFCs:


† RFC 2632 S/MIME Version 3 Certificate Handling
† RFC 2633 S/MIME Version 3 Message Specification
† RFC 2634 Enhanced Security Services for S/MIME


While OpenPGP uses the so-called "Web of Trust" to ensure the validity of signatures and keys, S/MIME relies on certificates. You have to get a certificate from a CA before you can S/MIME-sign or encrypt messages within The Bat!.


The Bat! offers two S/MIME implementations: its own (internal) and the Microsoft CryptoAPI.





Related topics:

S/MIME Preferences

Obtaining certificates

View certificates

Export certificates

Signing messages

Encrypting messages

Verifying signature

Decrypting messages

Microsoft CryptoAPI

S/MIME internal implementation

Hardware security token