On Sun, Dec 07, 2014 at 05:02:52AM -0500, George Spelvin wrote: > > How does this implicate the low bits specifically?
If you can easily deduce the pre-images that make the last bit of the hash even or odd, then you've just cut your search space for collisions by half. The real killer is that you can do this without knowing what the secret is. Our entire scheme is dependent on using the secret to defeat would-be attackers. If CRC does not make effective use of the secret, then we're essentially naked against attackers. Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
