Cryptographic device with administrative access interface utilizing event-based one-time passcodes

A method comprising:

• maintaining an event counter characterizing a number of successful administrative accesses to a cryptographic device comprising a processor coupled to a memory;
• receiving an event-based one-time passcode for a given administrative access attempt;
• comparing the received event-based one-time passcode to an expected event-based one-time passcode determined as a function of a current value of the event counter by:
• identifying a window having a plurality of acceptable event counter values as a function of the current value of the event counter, and
• determining if an event counter value of the received event-based one-time passcode falls within the identified window;
• and
• granting or denying the given administrative access attempt based at least in part on a result of the comparing;
• wherein the maintaining, receiving, comparing and granting or denying are performed by the cryptographic device.

A computer program product comprising a non-transitory processor-readable storage medium having embodied therein one or more software programs, wherein the one or more software programs when executed by a cryptographic device comprising a processor coupled to a memory cause the cryptographic device:

• to maintain an event counter characterizing a number of successful administrative accesses to the cryptographic device;
• to receive an event-based one-time passcode for a given administrative access attempt;
• to compare the received event-based one-time passcode to an expected event-based one-time passcode determined as a function of a current value of the event counter by:
• identifying a window having a plurality of acceptable event counter values as a function of the current value of the event counter, and
• determining if an event counter value of the received event-based one-time passcode falls within the identified window;
• and
• to grant or deny the given administrative access attempt based at least in part on a result of the comparing.