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bogus random entropy sourcesbogus random entropy sourcesPosted Oct 6, 2010 3:36 UTC (Wed) by PaulWay (✭ supporter ✭, #45600)In reply to: bogus random entropy sources by patrick_g Parent article: Solid-state storage devices and the block layer
Purely an anecdote, but the other day I had the occasion to use shred to shred two disks at once. The machine was a modern Intel Core Quad system, and the disks were writing at 60MBytes/sec with 3% CPU load. Since modern shred just writes a number of layers of pure random data from /dev/urandom, I have to assume that there was either hardware crypto or randomness generation going on there. Who knew?!
Have fun,
Paul
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bogus random entropy sources Posted Oct 6, 2010 3:47 UTC (Wed) by jzbiciak (✭ supporter ✭, #5246) [Link] Well, /dev/urandom doesn't block when the kernel entropy pool runs out. The hardware crypto acceleration may've been getting used, but that's orthogonal to the question of gathering entropy.
bogus random entropy sources Posted Oct 6, 2010 19:34 UTC (Wed) by paulj (subscriber, #341) [Link]
Hehe, so shred was using entropy collected from the disk controllers, collected from shred writing to disks..
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