I am posting this once again as my previous post went into the middle of the thread and may go unnoticed.
Ed, Thank you for sharing the calculations. In lay terms, for Sha256, how many blocks of data would be needed to have one collision? Assuming each block is 4K is size, we probably can calculate the final data size beyond which the collision may occur. This would enable us to make the following statement: "With Sha256, you need verification to be turned on only if you are dealing with more than xxxT of data." Also, another related question. Why 256 bits was chosen and not 128 bits or 512 bits? I guess Sha512 may be an overkill. In your formula, how many blocks of data would be needed to have one collision using Sha128? Appreciate your help. Regards, Peter -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
