Skey is a very simple program that will render great service to those needing to work in an environment that makes use of One-Time Passwords (OTP).

It involves a system of strong authentication based on the challenge/response principle where a password is valid for only one session.

The advantages of this method don't fall within the scope of this test, but even so let's say that security is improved: the password is used only once, it is calculated by the computer and not chosen by a user, no brute force attacks are possible, and one can even send it unencrypted over the network, seeing as once it's been sniffed out, it's already obsolete.

Here it's the client side that interests us and Skey will let you get the password calculated by the server: you enter the challenge to be resolved (sequence number and seed) supplied by the system that you want to connect to, you enter your personal password and the only thing left to do is to click on the hashing system chosen (MD4 or MD5) to obtain the OTP, the famous 64-bit password.