Binary package “monkeysphere” in ubuntu precise
leverage the OpenPGP web of trust for SSH and TLS authentication
SSH key-based authentication is tried-and-true, but it lacks a true
Public Key Infrastructure for key certification, revocation and
expiration. Monkeysphere is a framework that uses the OpenPGP web of
trust for these PKI functions. It can be used in both directions:
for users to get validated host keys, and for hosts to authenticate
users. Current monkeysphere SSH tools are designed to integrate
with the OpenSSH implementation of the Secure Shell protocol.
Monkeysphere can also be used by a validation agent to validate TLS
connections (e.g. https).