PC Lock 2.0 Recovery Contest

This is another app that lunch a screen saver and you need to know the password to exit this screen saver and have access to windows, the password is sotred in the registy.

This protection is very very strange.At a first time it seems more intelligent than others cause this do a thing that the other programs didnt do.It encrypts the password entered by the user and then it compares it with the right encrypted password, and the encryption routine is based on a variable, this variable is the sum of the first and the second letter and so once encrypted we would have needed of this sum to decrypt it (without bruteforcing) but once the password is encrypted we do not have more any information about the fiirst or the second chars or their sum, so the only solution would have been bruteforcing, that would haven't been taken too much time (some seconds) but the program after this do a very strange thing cause the encryption routin after having encrypted the whole password retakes the first and the second chars of the unencrypted password and put these after the encrypted password, so that , to recover the password we can take the first and the second chars that are the last two chars of the encrypted password and calculate their sum and decrypt the whole password immidiately.

Program's Url	www.chrislloyd.co.uk
Suby's Password Recovery	HERE[pclockprt.zip - MISSING]
Suby's Password Recovery win32asm source	HERE[pclockprts.zip - MISSING]