encode a string to a lenght of {n < 150} signs and decode it later? : <p>I would like to encode a string to another string with a lenght of &lt; or = 150
I know that sha-1 can do that but here is the point:
I want to decode it later (without a supercomputer!)</p>

<p>I am searching for an algorithm. My favourite languages are: java and python but when i know the algorithm i could implement it...</p>
