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Table 1 Notations

From: Practical pairing-Free sensor cooperation scheme for cloud-Assisted wireless body area networks

Notation Description
PCs Personal Controllers
HC Healthcare Center
Λi Original Identity Number i
κi Password of Sensor i
s Master Key of PC
\(\mathbb {G}_{\mathcal {H}}\) Cyclic Additive Group
P Generator of \(\mathbb {G}_{\mathcal {H}}\)
ξi Pseudo-Random Value Generated by i
Ki Pseudo-Random Value Generated by CA
H1,H2,H3,H4 Secure Hash Function
\(\mathcal {M}_{i}\) Transmitting Medical Data for Sensor i
Encx(y) Symmetric Encryption of y using x
Decx(y) Symmetric Decryption of y using x
ω Pseudo-Random Value Generated by PC
Ppub CA Public Key
\(\mathcal {K}\) Final Group Key
\(\mathbb {I}\) Numbers of Sensors