Off-the-Record Messaging, commonly referred to as OTR, is a cryptographic protocol that provides strong encryption for instant messaging conversations. OTR uses a combination of the AES symmetric-key algorithm, the Diffie–Hellman key exchange, and the SHA-1 hash function. In addition to authentication and encryption, OTR provides perfect forward secrecy and malleable encryption.

פרוטוקולים
אנונימיות
I2P
Tor
תקשורת
DNS
IRC
Matrix
Tox
XMPP
הצפנה
GPG
OMEMO
OTR
S/MIME
SSL/TLS
ZRTP
סינכרון
ActiveSync
CalDAV
CardDAV
WebDAV
Syndication
RSS