Hello, I have a specific application which I wanted to protect with a OTP system, but which can only use numbers. What I am trying to do is that the user gets a number (sensible length, perhaps 8 digits), uses an OTP tool on his palm to generate a response with a password he knows, and enters this number. any ideas / code which will point me in the right direction? The CPAN OTP module will generate chars... thanks for your help! jan

In reply to OTP (S/Key) implementation using just numbers by Micz

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