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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