Length for AES256 symmetric encryption passphrase?

[Kristian Fiskerstrand]

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On 04/03/2014 11:27 PM, Sam Gleske wrote:
> You're making the assumption that 32 ASCII characters can produce
> every possible binary combination in 256 bits.  I don't know how
> AES handles password phrases longer than 32 bytes but the key can
> be stronger I'd imagine with more random data as the key.  I'm
> simply presuming.
> 

You'd want a key derivative function that produce an output of 32
bytes to use as the actual AES key. But you are indeed correct in the
point that what matter is the amount of entropy provided by the
passphrase.


- -- 
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Kristian Fiskerstrand
Blog: http://blog.sumptuouscapital.com
Twitter: @krifisk
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Public PGP key 0xE3EDFAE3 at hkp://pool.sks-keyservers.net
fpr:94CB AFDD 3034 5109 5618 35AA 0B7F 8B60 E3ED FAE3
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Varitatio delectat
Change pleases
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