Using quepasa means remembering a single passphrase which covers all the web sites you visit. The passwords are generated automatically using the Secure Hash algorithm SHA-256 to generate a cryptographically secure password.
quepasa amazon "I am too sexy for my shirt"
In this case the password is WQ45f(A.. Notice how it's a mixture of letters, numbers and other characters. Now you need a password for Yahoo! as well. Do the same command:
quepasa yahoo "I am too sexy for my shirt"
In this case the password is %kHcyMQ..
Call the web site name w and the passphrase p. Compute the SHA-256 hash expressed as a hexadecimal number of pwp (i.e. the concatentation of p with w and p). Call that number h.
Starting from the RHS or low-end of h take each DWORD and sum the individual bytes mod 94. That yields a number in the range 0 to 93. Add 33 to get a number in the range 33 to 126. The corresponding ASCII character is the first character of the password. Continue with the remaining DWORDs to obtain an 8 character password.