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Definition
Introduction
Kerchoff’s laws ( maxim’s ) recommend basing cryptographic security solely on the secrecy of the key and not on the concealment of the encryption algorithm. A cryptosystem that uses some specific encryption method may, however, be imperfect as to its physical implementation. One or several leakages of all possible kinds may in that case provide an attacker with relevant information. Physical signals can often be used as a leakage source to conduct side-channel cryptanalysis [9] (refer also side-channel attacks ). Time, power consumption, or electromagnetic radiations can, for instance, be used. Electromagnetic radiation leakage has been known for a long time now, [6] and it also constitutes the subject of very recent research [11]. When analyzing cryptographic implementations, the near and far field of cryptographic processors may offer a leakage source that should be seriously taken into account.
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Quisquater, JJ., Samyde, D. (2011). Electromagnetic Attack. In: van Tilborg, H.C.A., Jajodia, S. (eds) Encyclopedia of Cryptography and Security. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-5906-5_125
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