10.4225/03/57CFAD12CF6E3 Yuliang Zheng Yuliang Zheng Digital message encryption and authentication -1998 Monash University 2016 Patents -- Australia Australia -- Patent, Trade Marks and Design Office 1998 Monash University Patents Collection 1959.1/23299 1959.1/2736 AU721497 2016-09-07 06:00:47 Standard https://bridges.monash.edu/articles/standard/Digital_message_encryption_and_authentication_-1998/3807867 A method and system for performing digital message encryption and signature encoding for use in, for example, communications and digital information storage systems. For secure communication for digital messages it is necessary to both encrypt the message and sign the message with a digital signature scheme to allow for authentication by the receiver. In order to the computational efficiency and reduce communications overhead in secure communications, a method and system, referred to as "signcryption", are provided in which the processes of encryption and authentication are combined. The principles of public key cryptography are utilised, although any suitable keyed encryption algorithm can be employed for the message encoding. Examples of signature schemes which can be easily implemented by signcryption include the ElGamal, Schnorr and Digital Signature Standard. Messages to multiple separate recipients can be efficiently dealt with, and because of the low computational and communications overheads the signcryption method is particularly applicable for use in smart cards and for highly secure and authenticated key transport over ATM.