Security Flaw of an ECC-Based Signcryption Scheme with Anonymity

Provided by: International Journal of Network Security
Topic: Security
Format: PDF
Confidentiality, integrity, non-repudiation and authentication are the important requirements for many cryptographic applications. A traditional approach to achieve these requirements is to sign-then-encrypt the message. Signcryption, first proposed by the researchers, is a cryptographic primitive that performs digital signature and public key encryption simultaneously, at lower computational costs and communication overheads than the signature-then-encryption approach. Signcryption is a cryptographic primitive that performs digital signature and public key encryption simultaneously, at lower computational costs and communication overhead than signing and encrypting separately. Recently, the researchers proposed an anonymous ECC-based signcryption scheme. The authors show that their scheme is not secure even against a chosen-plaintext attack.

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