Messaging Layer Security (MLS) is a security layer for encrypting messages in groups of size two to many.

Goto: https://webencrypt.org/mls/

Autocrypt is an open specification for e-mail encryption. Under the hood, it uses OpenPGP and other e-mail standards.

Goto: https://webencrypt.org/autocrypt/

Off-the-Record Messaging (OTR) is a cryptographic protocol that provides encryption for instant messaging conversations. OTR uses a combination of AES symmetric-key algorithm with 128 bits key length, the Diffie–Hellman key exchange with 1536 bits group size, and the SHA-1 hash function. In addition to authentication and encryption, OTR provides forward secrecy and malleable encryption.

Goto: https://webencrypt.org/otr/

OMEMO /oˈmiːmoʊ/ (OMEMO Multi-End Message and Object Encryption) is an XMPP Extension Protocol (XEP) for secure multi-client end-to-end encryption. It is an open standard based on a Double Ratchet and PEP which can be freely used and implemented by anyone.

Goto: https://webencrypt.org/omemo/

https://darkmail.info/ - Dark Mail Technical Alliance

Related projects:

• https://keytransparency.org/ [GitHub]