Smart medical devices will only be smart if they also include technology to provide security and privacy. In practice this means the inclusion of cryptographic algorithms of sufficient cryptographic strength. For battery operated devices or for passively powered devices, these cryptographic algorithms need highly efficient, low power, low energy realizations. Moreover, unique to cryptographic implementations is that they also need protection against physical tampering either active or passive. This means that countermeasures need to be included during the design process.
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