Available in English Registration Required | Commercial No Users about 370,000 | |
Website sigaint.org, sigaintevyh2rzvw.onion | ||
SIGAINT is a Tor hidden service offering secure email services. According to its FAQ page, its web interface uses SquirrelMail which does not rely on JavaScript. Passwords cannot be recovered. Users receive two addresses per inbox: one at sigaint.org for receiving clearnet emails and the other at its .onion address only for receiving emails sent from other Tor-enabled email services. Free accounts have 50 MB of storage space and expire after one year of inactivity. Upgraded accounts have access to POP3, IMAP, SMTP, larger size limits, full disk encryption, and never expire.
The service is recommended by various security specialists as a highly secure email service.
In April 2015 a number of user accounts were compromised in what was speculated at the time was a government-sponsored deanonymization attack from 70 different exit nodes. A SIGAINT administrator said that the hidden service was not hacked but malicious exit nodes had modified their clearnet page so that its link to the hidden service pointed to an imposter hidden service, effectively tricking users with a phishing attack that harvesting login credentials. SIGAINT has since added SSL to their gateway to protect against such attacks.
The service is currently down. Both its ".org" website and its onion link return error code 500.