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Hardware TOTP tokens with time synchronization

Although many users nowadays prefer to use mobile applications for TOTP, there are still use cases for separate/isolated standalone hardware TOTP devices. For various technical restrictions, such as the accuracy limits of oscillators used in realtime clock chips, classic TOTP hardware tokens have a natural tendency to introduce time-drift after some period. This paper describes an innovative product allowing us to overcome this disadvantage by introducing a new category of programmable TOTP hardware tokens allowing adjusting the system hardware clock.

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Other projects

Google authenticator for Citrix StoreFront
Google authenticator for Citrix Web Interface 5.4
MOTP App with QR based enrolment

Not security related