Paper 2006/126

ECGSC: Elliptic Curve based Generalized Signcryption Scheme

Yiliang Han and Xiaoyuan Yang


Signcryption is a new cryptographic primitive that simultaneously fulfills both the functions of signature and encryption. The definition of generalized signcryption is proposed in the paper firstly. Generalized signcryption has a special feature that provides confidentiality or authenticity separately under the condition of specific inputs. So it is more useful than common ones. Based on ECDSA, a signcryption scheme called ECGSC is designed. It will be equivalent to an AtE(OTP$,MAC) encryption scheme or ECDSA when one of party is absent. A third party can verify the signcryption text publicly in the method of ECDSA. Security properties are proven based on Random Oracle mode: confidentiality (CUF-CPA), unforgeability (UF-CMA) and non-repudiation. Compared with the others, ECGSC presents a 78% reduction in computational cost for typical security parameters for high level security applications.

Available format(s)
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Contact author(s)
yilianghan @ hotmail com
2006-03-30: received
Short URL
Creative Commons Attribution


      author = {Yiliang Han and Xiaoyuan Yang},
      title = {ECGSC: Elliptic Curve based Generalized Signcryption Scheme},
      howpublished = {Cryptology ePrint Archive, Paper 2006/126},
      year = {2006},
      note = {\url{}},
      url = {}
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