The OATH Toolkit makes it easy to build one-time password authentication systems. This package contains a shared library and a command line tool for generating and validating OTPs. Supported technologies include the event-based HOTP algorithm (RFC 4226) and the time-based TOTP algorithm (draft-mraihi-totp-timebased-07). OATH stands for Open AuTHentication, which is the organization that specify the algorithms. The OATH Toolkit also includes a library and tool for the Portable Symmetric Key Container (PSKC) data format specified in RFC 6030 for dealing with key provisioning; these are packaged separately to reduce dependencies for users only requiring OTP.
WWW: http://www.nongnu.org/oath-toolkit/
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