Checksum to compare custom objects

FROM : j o a r
DATE : Sat Jan 12 20:34:10 2002

Hej,

I would need to be able to compare two objects on different machines in
a fast efficient way. How would I go about creating a hash / checksum
for that purpose? Let's assume that the object in question conforms to
NSCoding - which I assume would help?

Pointers to TFM, sample code, et.c. all greatly appreciated.

Best regards,

j o a r