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Table 1 Notations used in this paper

From: Smart card based time efficient authentication scheme for global grid computing

S Server
Ui User
SID Identity of server Si
IDi Identity of user Ui
Bi Biometric data of Ui
(PWi) Password of Ui
h(.) One-way hash function
x The master secret key
(pk, sk) Public-private key pair
The exclusive-OR operation
Message concatenation
R Random number generated by Ui
nu Nonce value generated by Ui
ns Nonce value generated by the server Si