If I remember coorectly it's KerberosV uses an MD5 hash of /dev/mem.

I'm pretty familiar with the most recent iteration of Kerberos V (pre-release beta 3). There is no mention of /dev/mem in any of the Kerberos V source code files. As best as I can tell, all DES keys and random numbers used by Kerberos are ultimately derived from pass-phrases. The random DES keys produced by the Kerberos administration utilities are derived from the KDC master key and some other info (not /dev/mem). The KDC master key is derived from a pass-phrase. All random numbers used inside the Kerberos runtime library are derived from the user's or server's secret DES key. A user's secret key is derived from the user's pass-phase. A server's secret key is derived from a pass-phrase or generated automagically by the Kerberos administration utilities mention above. (all this is assuming you are using the DES encryption option) Jim_Miller@suite.com