Free Secure Email Certificates Secure Email Certificate Email Security Digital Email SignaturesUsing email encryption is often a complicated and painful process. These days strong SMIME based encryption is built in to almost all major email clients. The cost and complexity of obtaining the necessary cryptographic certificates is the biggest obstacle to wide spread use at this point. Sites like Comodo make the process easier. While the security model is not perfect, any reasonable application of crypto and certificates will vastly improve the general security of email.