-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/27/06 16:02, Karen Hill wrote: > Gene Wirchenko wrote: [snip] >>> Yet what happens if there is a collision of the checksum for a row? >> Then you get told that no change has occurred when one has. I >> would call this an error. > > That's exactly what I thought when I read that in his book. I was > thinking back to the sha1 and md5 algorithms, maybe a special crc > algorithm is safe from this. I doubt it. The typical CRC is 32 bits, whereas the MD5 hash is 128 bits and SHA1 is 160 bits. - -- Ron Johnson, Jr. Jefferson LA USA Is "common sense" really valid? For example, it is "common sense" to white-power racists that whites are superior to blacks, and that those with brown skins are mud people. However, that "common sense" is obviously wrong. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD4DBQFFGuxUS9HxQb37XmcRAr0GAJ0d6r4C7Zt2tug/AHH/aCPG5p8UMgCY8bDU MgTQuPe9uNT5Ny3nW0qk6w== =o//D -----END PGP SIGNATURE-----