VNC challenge/response

[barcajax () gmail com]

I sniffed an unencrypted VNC session between my test machines. I noticed that a challenge 
(\337n\304KG\311\021\302\344\246\333i\375\324\316\341) sent from the server and the response 
(h\374\215d\306\207B\n^\243d]\222(j\242) from the client. I know the password because it was set by me but I was 
wondering what format the challenge/response is in and how to reverse it?

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