Cryptographic log on

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Cryptographic log-on (CLO) is a process that uses Common Access Cards (CAC) and embedded Public Key Infrastructure (PKI) certificates to authenticate a user's identification to a workstation and network. It replaces the username and passwords for identifying and authenticating users. To log-on cryptographically to a CLO-enabled workstation, users simply insert their CAC into their workstation’s CAC reader and provide their Personal Identification Number (PIN).

The Navy/Marine Corps Intranet, among many other secure networks, uses CLO.


Mauck, James (January–March 2006). "Cryptographic Logon". CHIPS — The Department of the Navy Information Technology Magazine. United States Department of the Navy. Archived from the original on 2007-01-15. Retrieved 2006-06-01.