I should have read the blog post you linked to before posting the
comment. There are no factual errors in the blog post to my knowledge
(I'm no professional cryptographer, just an enthusiast who took a couple
formal courses and tinkered a bit), and the argument is compelling.

My previous comment actually looks silly now, since I talk of "good"
random data that the post disputes. But I stand my ground that using
/dev/urandom for serious business like GPG keys is a bad idea.
/dev/random providess a better guarantee than /dev/urandom regarding the
randomness of data you extract, and many including me are not happy to
give up this guarantee.

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https://bugs.launchpad.net/bugs/706011

Title:
  gpg --key-gen doesn't have enough entropy and rng-tools install/start
  fails

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