A method of establishing a communication channel between a network client and a computer server over a network is described. The network client may be configured to communicate with the computer server over the network and to communicate with a token manager. The token manager may be configured with a parent digital certificate that is associated with the token manager. The token manager or network client generates a credential from the parent digital certificate, and transmits the credential to the computer server. The credential may be associated with the computer server. The network client may establish the communications channel with the computer server in accordance with an outcome of a determination of validity of the credential by, the computer server.