Advances, Systems and Applications
Table 1 PMHE symbol definition
Symbol | Definition Description |
|---|---|
S | Server |
C | Client |
E | Encoding operation |
D | Decoding operation |
P | Original data |
B | Plaintext |
M | Encrypted plaintext |
Enc | Encryption operation |
Dec | Decryption operation |
x | Unknown number |
T | The intermediary result of homomorphic operation |
X | The vector of user physiological feature |
\({x}_{i}\) | The value of user physiological feature |
N(\({x}_{i}\)) | The name of user physiological feature |
F(x) | Basic elementary function (except for positive Exponential power functions) |
pk | Public key |
Req(pk) | Request public key |
\({m}_{i}\) | Intermediate modulus in coefficient_modulus |
h | The number of modules in coefficient_modulus |
NCH | The maximum number of homomorphic multiplications |
NRE | The number of rescaling |
ILE | The initial “level” of ciphertext |