On the Security of Recent Protocols

  title={On the Security of Recent Protocols},
  author={John A. Clark and Jeremy L. Jacob},
  journal={Inf. Process. Lett.},
Cryptographic protocols are notoriously difficult to design. Two have appeared in the literature recently, by Hwang et al [3] and by Hwang and Cheng [2]. Both are flawed in different ways. Hwang et al examined the Neuman-Stubblebine repeated authentication protocol [4] and found two attacks [3]. They describe a modification to the protocol. However, this description fails to give the necessary properties of the encryption mechanism. Choices of encryption mechanism which are in wide use are not… CONTINUE READING

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