OPENCORES.ORG

While using the AES128 core (aes_crypto_core) I have come across a

Hi Jonathan,
I am sorry for not being able to reply earlier, I have been travelling a
lot and hardly have checked my mails in between. Hmm.. that was a long
time back and dont remember exactly but if my memory is correct the
inverse key is the key that is output after an encryption is completed. If
you observe, both data and key undergo a series of transformation and at
the end there is both a garbled key and encrypted data coming out. This
key is taken as the inverse key for decryption. Infact I have used one set
of key pairs as default in my test bench. This information is also
explained in the FIPS document.

Hope this helps,
Hemanth

> While using the AES128 core (aes_crypto_core) I have come across a
> problem; after encrypting data with a key and receiving an output, how
> do I know what the inverse key is in order to decrypt the output?  I had
> an example from the fips document about AES so I was able to test
> given their key and output key, and was successful in doing so.
> However, making up a key wont work for me as I have no idea what the
> inverse key is.  Clearing this issue up would really help me out.  Thanks.
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/cores
>

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