S / MIME Email Certificate Authorities
Get your digital signature here and sign or encrypt your email communication to keep it secure and private.
CAcert Inc. - Free Community Certificate Authority
CAcert Inc. provides free S/MIME email certificates. To get your name on the certificate, you meet other, trusted, people who confirm you are who you claim you are.
DST TrustID Digital Certificate
The TrustID Personal Certificate offers authentication and email encryption. Your identity is verified via the U.S. Postal Service.
GlobalSign PersonalSign
GlobalSign offers two levels of email certificates: PersonalSign 2 for personal and PersonalSign 3 Pro for professional use. The latter requires physical presence at one of the registration authorities (in several European countries).
Thawte Personal Email Certificate
Thawte offers personal S/MIME email certificates for free. Identity verification happens through a "web of trust".
VeriSign Digital IDs For Secure E-Mail
VeriSign offers Class 1 digital signatures including U.S. $1,000 warranty protection, and has affiliates all over the world.