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 SDC Constraint, Input / Output Delay 8/26/2016

Preparing IO constraint for FPGA is always a tedious job. And the following is a spreadsheet to help the number crunching. BTW, I have to say that MS Excel is much more powerful than Google Spreadsheet.

    Posted by Changyi at 12:54 AM 0 Comments  

 AES and Encryption in China 8/10/2016

AES is a popular encryption algorithm with symmetric keys. If you are looking for open source AES implementions, Ref [1] is one of them.

To verify the AES implementation is in line with National Standard, use the test vectors from Ref[2] as passing criteria.

BTW,  China has its own flavor of encryption product regulation (Ref[3][4][5][6][7]). Ask Office of Security Commercial Code Administration (OSCCA) before the police knocking on your door. I'm not kidding, and HP knows it all well :-( (Ref[3]).


References:
[1] Ilya Levin, a byte-oriented aes-256 implementation
[2] Morris Dworkin, Recommendation for Block Cipher Modes of Operation, Methods and Techniques, NIST, 2001
[3] Xia Yu and Matthew Murphy, The Regulation of Encryption Products in China, MMLC Group
[4] CHINA’S EXPORT CONTROLS AND ENCRYPTION REGULATIONS
[5] 商用密码产品使用管理规定
[6] Mr.王掌柜, 中国有趣的“商用密码管理”
[7] 个人使用密码产品,例如 OpenSSL,是否属于违法行为?

    Posted by Changyi at 8:58 PM 0 Comments  

   

 

    

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