mORMot Open Source

M0V

Member

Registered: 2015-01-27

Posts: 10

AES with SHA512

Should we expect SHA512 for AES ?

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,660

Website

Re: AES with SHA512

Do you need such a high level?
Is not SHA-256 enough?
SHA-256 is perfect for AES-256, since the 256 key size does match the highest possible key size defined by AES.
And mathematically, 256 bits is enough at least for the next decades.
Computing a SHA-512 then later on reducing it to 256 bits would not make sense.
See http://crypto.stackexchange.com/a/20258

M0V

Member

Registered: 2015-01-27

Posts: 10

Re: AES with SHA512

thanks for your explanation