On Thu, 2 Nov 2006, Alexander Klimov wrote:
I guess many people here have tried full disk encryption for themselves, do you notice any difference in performance or not?
Yes and no! I use dm-crypt on a Linux laptop with FC5. On the encrypted filesystem: # > df /dev/mapper/secure 309895 213342 80553 73% /secure # > time dd if=/dev/zero of=cryptogram bs=1MB count=50 50+0 records in 50+0 records out 50000000 bytes (50 MB) copied, 1.96366 seconds, 25.5 MB/s dd if=/dev/zero of=cryptogram bs=1MB count=50 0.00s user 0.52s system 25% cpu 2.023 total On the unencrypted filesystem: # > time dd if=/dev/zero of=cryptogram bs=1MB count=50 50+0 records in 50+0 records out 50000000 bytes (50 MB) copied, 0.216106 seconds, 231 MB/s real 0m0.257s user 0m0.000s sys 0m0.252s The factor 9.05 making the the unencrypted filesystem faster than the encrypted one really does not make a difference for me for anything I do. I'd be happy with 1 MB/s and I got 25! (using AES-256) Regards Ralf Senderek *.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.* * Ralf Senderek <[EMAIL PROTECTED]> http://senderek.com* What is privacy * * Sandstr. 60 D-41849 Wassenberg +49 2432-3960 * without * * PGP: AB 2C 85 AB DB D3 10 E7 CD A4 F8 AC 52 FC A9 ED * Pure Crypto? * 49466008763407508762442876812634724277805553224967086648493733366295231438448 --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]