
MD5 = fafb6f34de0e160ef0c2fd2ada794b74
Thank you for all the creative answers!
To make stage 4 of the PSI test more transparent for the participants
the MD5 hash of the January 2010 stage 4 solution image is
already available:
MD5 for January 2010 = f1d9cb0f2c22c9e7cd53aaaa1990a1d7
When the solution image is finally displayed here January 2010
you can use this program (Windows) to display its MD5 hash
or use a similar program for your system.
To check the MD5 hash of the solution image simply drag it into the
program window and compare the displayed hash with the
MD5 line above.