The markings on the processor and memory chips are scratched off to hamper reverse engineering. Stealth MXP sticks have their own processor and a Field Programmable Gate Array (FPGA) chip – Actel ProASIC 3 A3P250 – that implements AES encryption in hardware and prevents the memory contents from being read. On examination it is evident that the Stealth MXP is a serious security product. Rather, it is FIPS-140-2 certified, which means that after thorough testing, the US National Institute of Standards and Technology (NIST) declared it safe for use by federal US authorities. The MXI Security Stealth MXP USB memory stick tested by Objectif Sécurité, is not a USB stick with just run-of-the-mill security features. Whether you are talking about certification or 256-bit AES, even the best encryption provides no protection if an additional function accidentally renders the password vulnerable. Screwing up security Philippe Oechslin USB stick with hardware AES encryption
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