draft-ietf-keytrans-protocol
Key Transparency Protocol
While there are several established protocols for end-to-end
encryption, relatively little attention has been given to securely
distributing the end-user public keys for such encryption. As a
result, these protocols are often still vulnerable to eavesdropping
by active attackers. Key Transparency is a protocol for distributing
sensitive cryptographic information, such as public keys, in a way
that reliably either prevents interference or detects that it
occurred in a timely manner.