Hi if that picture is true then can someone please she'd some light for example on why a stupid thing such as a remotely managed electric car battery charger is running SHA-1024? Thanks, btw they used to run SHA-256 before...
There is no SHA-1024.
http://en.wikipedia.org/wiki/SHA-2Wikipedia is full of mistakes. I am sure there is SHA-1024 product coming out, the guy is making the hardware and applying for license...
There is no 1024 bit version of SHA-2. Either your friend is talking nonsense or you misunderstood him. SHA-2 is no longer being developed. SHA-3 is the intended replacement and it supports arbitrary hash sizes up to 512 bits.
Why would anyone use SHA-512 then if SHA-256 is impossible to break in this time and space?
Not impossible to break, impossible to BRUTE FORCE. Cryptanalysis may eventually weaken SHA-256 (and SHA-512) and performing a preimage attack may be faster than brute force. Today no such flaws are known to exist for SHA-2 (all hash sizes) however the use of larger keys and hash sizes can be thought of as insurance.