Less than 256 bytes of code. Over 2 Megabytes of controversy.
Shame on you Mateusz! :-) All joking aside, from what I gather, your bsum is only meant to verify local files were copied correctly from one machine to another. Most forms of checksums should be sufficient for that task. Sure a collision is possible. More bits in the checksum reduces the possibility. But even with a SHA 256 hash, the chance of accidental collision is so remote as to be zero. It is still theoretically possible. How sure do you need to be? Well, you could be absolutely sure by coping them over then back. Then doing a byte level comparison between the original and the copy of a copy. But why? Now as for a man in the middle of your two machines... Even that check could be thwarted by a crafty attacker. So, I assume that the checking done by you bsum is the exact level of certainty you desire. Sure enough. Jerome ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
