Abstract: A system and method are disclosed for managing bi-directional authentication among two or more users comprising at least one server which distributes security protocol information. The security protocol information may include digital certificates which permit authentication of users. The system and method allow for distribution of security protocol information regarding multiple users to multiple selected users directly from the server. Thus, users do not need to exchange information individually among themselves. The distribution of information may include updates, such as the addition of a new user or the change in the status or protocol information of an existing user. New users with proper privileges may receive protocol information for multiple existing users from a single source.