It should also be reasonably well-handled from creation to installation on the Zope site. ZSmime uses the signer key to provide message integrity and non-repudiation of origin. The recipient certificates should also be uploaded into Zope as GuardedFiles. This is not recommended. All rights reserved.
Usual disclaimers apply.
Eric Young and Tim Hudson for SSLeay. Guido van Rossum and the Python community for Python. Digital Creations and the Zope community for Zope. Ng Pheng Siong for M2Crypto.