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Dear Shalini,
I had published the function CryptAES in the FEX, but it has been removed, because it conflicts with the U.S. Export Administration Regulations governed by the U.S. Dept. of Commerce, Bureau of Industry and Security. This concerned all other AES implementations also.
If you search in the net, you can still find it, because all FEX submissions are copied soon. Another tool, which uses a Java call from Matlab has been copied to this newgroup also.
I had extremly tedious discussions about the risk resulting from a published program for AES encryption. The US government decided that it is a real risk, if somebody downloads the code from one of the 5 states belonging to the axis of evil. Anyhow, you can still download the detailed specifications as PDF from official sites in the US, because a PDF is covered be the freedom of speech.
Even when you download Java, you have to confirm by clicking a checkbox, that you do not live in one of the evil countries. Then the 256-bit encryption is available, otherwise the key length is limited to 128 bits.
Kind regards, Jan
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