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, Chung et al. proposed an anonymous ECC-based signcryption scheme. We show that their scheme is not secure even against a chosen-plaintext attack.
['Hu Xiong', 'Jianbin Hu', 'Zhong Chen']
Security Flaw of an ECC-based Signcryption Scheme with Anonymity