For anyone interested in embedded systems and hardware security, the TAMPER (Tamper And Monitoring Protection Engineering Research) Lab site is a great resource. There are detailed papers discussing their areas of research, such as the information leakage caused by electromagnetic emanations, and cryptographic security of smartcards.
I highly recommend the paper titled “Design Principles for Tamper-Resistant Smartcard Processors”. The slides [pdf] are especially good, with excellent graphics and full-color photos of integrated circuits, close up.
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