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The patient-related data stored in the WBSN plays an important role in medical diagnosis and treatment; hence it is essential to ensure the security of these data. Access to patient-related data must be strictly limited only to authorized users; otherwise, the patient's privacy could be abused. There has been very little study done in encryption algorithms suitable for WBSN. In this paper the authors focus on RC5 encryption algorithm as a potential cipher solution for providing data protection in WBSN. RC5 can be considered as one of the best ciphers in terms of overall performance, when used in nodes with limited memory and processing capabilities.
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