Linux.com: Freenigma: Encryption for Webmail

“Until now, security-conscious email users could employ
encryption with traditional email clients, but were out of luck
with webmail services. Freenigma, a service to add encryption to
third-party webmail services via a Firefox plugin, aims to add
security to the convenience of webmail. My trial of the service
indicates that it’s making a good start, but has room to
improve.

“Freenigma provides encryption that works across multiple
webmail platforms. It isn’t the first system to encrypt webmail,
but it is the first that I’m aware of that encrypts mail for
third-party services such as Gmail. You can send encrypted mail
through Gmail if you use its SMTP and POP features, but you can’t
encrypt and decrypt mail within the webmail client itself…”

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