Security Analysis and Improvements of Session Key Establishment for Clustered Sensor Networks

Table 5

Energy costs of cryptographic algorithms [28].

Cryptographic algorithms	Energy costs
Signing of 1024-bit RSA signature	546.50 mJ
Verification of 1024-bit RSA signature	15.97 mJ
SHA1	0.76 μJ/byte
64-bit AES encryption	1.21 μJ/byte
64-bit AES decryption	1.21 μJ/byte
1024-bit DHKE key generation	875.96 mJ
1024-bit DHKE key exchange	1046.50 mJ
163-bit ECDH key generation	276.70 mJ
163-bit ECDH key exchange	163.50 mJ

These values are the experimental results in [28], in which the cryptographic algorithms were developed on a Compaq iPAQ H3670 equipped with a 206 MHz Intel SA-1110 StrongARM processor and 64 MB RAM.