FM> If 2 files are 1 bit different you will *never* get the same

 FM> CRC. Or the same checksum either, using Niels' approach. The

 FM> likelihood of getting the same CRC for 2 files with *multiple*

 FM> bits different depends on the size of the file.



 BL>   As I said, I bow to your superior knowledge. I have never analysed

 BL> CRC (and I don't intend to).



Think of a simpler case - it's impossible to get away with a single

bit error in one byte if parity is used.



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