Difference between revisions of "Talk:Random number generation"

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(import old conversation - on the bashing of /dev/urandom from Talk:Dm-crypt_with_LUKS)
 
(random vs urandom in this page: rm closed)
 
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== on the bashing of /dev/urandom ==
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== References for update ==
{{Note|This section was moved from [[Talk:Dm-crypt_with_LUKS]].}}
 
  
I don't take an opinion on whether old overwritten data can be read.
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Update reminder:
 
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* Linux 4.13 will bring the next important updates for {{ic|/dev/urandom}}. References:
However, there is an unrelated reason to fill a LUKS partition from {{ic|/dev/urandom}} before LUKS-initializing it (and after checking for bad blocks if you wanted to do that).
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** [https://lwn.net/Articles/724643/ LWN] article ([https://lwn.net/Articles/724671/], incl [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=52f6c588c77b76d548201470c2a28263a41b462b] [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e297a783e41560b44e3c14f38e420cba518113b8])
 
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** Related, systemd resolved the linked [https://github.com/systemd/systemd/issues/4167].
It makes it harder for people trying to read your disk and find out what's on it. If you filled it with zeroes, for example, then they would be able to tell which portions of the partition had been written to since you initialized it.
 
 
 
compare gentoo docs, http://en.gentoo-wiki.com/wiki/DM-Crypt_with_LUKS#Filling_the_disk_with_random_data --[[User:Idupree|Idupree]] 22:45, 3 March 2010 (EST)
 
 
 
:Agreed, {{ic|/dev/urandom}} should be used to clear partitions, at least as default in the examples. If anyone wants to zero the partitions instead of using random data, they are free to do so. --[[User:Montschok|Montschok]] 20:53, 11 August 2010 (EDT)
 

Latest revision as of 15:56, 27 August 2017

References for update

Update reminder:

  • Linux 4.13 will bring the next important updates for /dev/urandom. References: