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- jotp, The java OTP (aka S/Key) calculator
A java applet that implements a one-time password calculator compatible with all S/Key systems based on MD4 or MD5.
S/Key resource covering one-time password implementation, authentication modules, one-way functions, cryptography, and information security.
An RFC-2289 compliant OTP (S/Key) calculator for MacOS X, MacOS X Server, and NEXTSTEP.