Table 4:
Comparison of computation overhead in initialization phase.
Chen et al.'s protocol
Our protocol
Random number (
/
/
)
0/0/0
1/1/0
Symmetric encryption/decryption (
/
/
)
0/0/0
0/0/2
Modular exponentiation (
/
/
)
1/1/2
0/0/0
Hash operation (
/
/
)
1/1/4
1/1/2
Chebyshev polynomial computing (
/
/
)
0/0/0
1/1/0