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Date: Tue, 30 Oct 2012 16:55:22 +0200 From: Lasse Kärkkäinen <ljkarkk2@...hut.fi> To: linux-kernel@...r.kernel.org Subject: urandom is too slow Apparently there has been little or no development on urandom even though the device is in widespread use for disk shredding and such use. The device emits data at rather slow rate of 19 MB/s even on modern hardware where other software-based PRNGs could do far better. An even better option seems to be utilizing AES for encrypting zeroes, using a random key, allowing for rates up to 500 MB/s with hardware that has AES-NI instructions. Why is urandom so slow and why isn't AES hardware acceleration utilized? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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