Comments on: PGP Whole Disk Encryption for Mac, benchmarks http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/ Eric Cheng's Journal Mon, 22 Mar 2010 03:20:34 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Mike http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/comment-page-1/#comment-3139212 Mike Sun, 08 Nov 2009 15:34:49 +0000 http://echeng.com/journal/?p=2254#comment-3139212 <p>Coming in wicked late on this thread, but I had to chime in. While I try not to get too wrapped around the benchmark numbers, I was thoroughly ticked to see my X-25M go from clean 190+ MB/s average read times down to 22MB/s after encrypting it w/ PGP WDE. While I did not try different ciphers w/ WDE, I did set up 2 separate virtual disks - one with AES256 and the other with CAST5. Doing some informal testing, I moved a couple of gigs worth of data to each virtual disk. CAST5 was marginally better, but the transfer times still sucked (somewhere around 15MB/s). It would have been nice to actually get some real mileage out of my $149 pgp license, but the performance hit just isn't worth it.</p> Coming in wicked late on this thread, but I had to chime in. While I try not to get too wrapped around the benchmark numbers, I was thoroughly ticked to see my X-25M go from clean 190+ MB/s average read times down to 22MB/s after encrypting it w/ PGP WDE. While I did not try different ciphers w/ WDE, I did set up 2 separate virtual disks – one with AES256 and the other with CAST5. Doing some informal testing, I moved a couple of gigs worth of data to each virtual disk. CAST5 was marginally better, but the transfer times still sucked (somewhere around 15MB/s). It would have been nice to actually get some real mileage out of my $149 pgp license, but the performance hit just isn’t worth it.

]]> By: Chris http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/comment-page-1/#comment-2759063 Chris Wed, 14 Jan 2009 22:21:25 +0000 http://echeng.com/journal/?p=2254#comment-2759063 <p>I wonder what difference the encryption settings make. Would the numbers look much better with 128bit encryption instead of 256? Some tests on this would be nice :-)</p> I wonder what difference the encryption settings make. Would the numbers look much better with 128bit encryption instead of 256? Some tests on this would be nice :-)

]]> By: Robert Nicholson http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/comment-page-1/#comment-2750632 Robert Nicholson Fri, 09 Jan 2009 18:24:26 +0000 http://echeng.com/journal/?p=2254#comment-2750632 <p>So, Here's some depressing numbers. before and after from QuickBench don't think I can use WDE and get benefit from my X-25M</p> <p>Standard Test Results (Cycles: 1) < Insert Chart Here > Seq. Read Seq. Write Ran. Read Ran. Write 4 KB 31.585 20.208 9.353 27.323 8 KB 58.744 45.162 20.763 27.078 16 KB 92.027 60.741 36.307 54.145 32 KB 112.122 29.952 63.771 19.485 64 KB 136.029 61.689 101.707 51.064 128 KB 169.068 67.01 140.681 44.506 256 KB 208.844 26.506 186.3 33.99 512 KB 229.571 57.076 214.202 49.319 1024 KB 243.366 51.743 233.922 42.058 Standard Ave 142.373 46.676 111.89 38.774</p> <p>Standard Test Results (Cycles: 1) < Insert Chart Here > Seq. Read Seq. Write Ran. Read Ran. Write 4 KB 18.242 11.874 11.602 11.584 8 KB 23.325 20.067 14.99 8.954 16 KB 25.948 24.82 21.583 19.924 32 KB 28.316 26.754 24.557 15.061 64 KB 28.626 25.994 26.767 22.005 128 KB 29.789 21.122 28.318 12.667 256 KB 28.556 23.153 28.637 18.969 512 KB 30.612 23.109 28.664 18.175 1024 KB 30.517 23.287 28.507 18.57 Standard Ave 27.103 22.242 23.736 16.212</p> So, Here’s some depressing numbers. before and after from QuickBench don’t think I can use WDE and get benefit from my X-25M

Standard Test Results (Cycles: 1) < Insert Chart Here > Seq. Read Seq. Write Ran. Read Ran. Write 4 KB 31.585 20.208 9.353 27.323 8 KB 58.744 45.162 20.763 27.078 16 KB 92.027 60.741 36.307 54.145 32 KB 112.122 29.952 63.771 19.485 64 KB 136.029 61.689 101.707 51.064 128 KB 169.068 67.01 140.681 44.506 256 KB 208.844 26.506 186.3 33.99 512 KB 229.571 57.076 214.202 49.319 1024 KB 243.366 51.743 233.922 42.058 Standard Ave 142.373 46.676 111.89 38.774

Standard Test Results (Cycles: 1) < Insert Chart Here > Seq. Read Seq. Write Ran. Read Ran. Write 4 KB 18.242 11.874 11.602 11.584 8 KB 23.325 20.067 14.99 8.954 16 KB 25.948 24.82 21.583 19.924 32 KB 28.316 26.754 24.557 15.061 64 KB 28.626 25.994 26.767 22.005 128 KB 29.789 21.122 28.318 12.667 256 KB 28.556 23.153 28.637 18.969 512 KB 30.612 23.109 28.664 18.175 1024 KB 30.517 23.287 28.507 18.57 Standard Ave 27.103 22.242 23.736 16.212

]]> By: Around the web | alexking.org http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/comment-page-1/#comment-2534958 Around the web | alexking.org Mon, 06 Oct 2008 05:30:47 +0000 http://echeng.com/journal/?p=2254#comment-2534958 <p>[...] PGP Whole Disk Encryption for Mac, benchmarks [...]</p> [...] PGP Whole Disk Encryption for Mac, benchmarks [...]

]]> By: Wes http://echeng.com/journal/2008/10/01/pgp-whole-disk-encryption-for-mac-benchmarks/comment-page-1/#comment-2529621 Wes Fri, 03 Oct 2008 19:16:44 +0000 http://echeng.com/journal/?p=2254#comment-2529621 <p>Wow... those are some depressing numbers there.</p> Wow… those are some depressing numbers there.

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