Comparative analysis of different techniques of encryption for secured data transmission

In today's digital world, it is beyond any doubt that almost everyone uses the Internet for different purposes. Most of the time data transmitted over the Internet contain confidential or private information that people want to remain protected. There are many encryption algorithms available for concealing information. However, none of the studies so far have compared different types of algorithms in more details. This paper will compare commonly used encryption algorithms. This comparison will be performed based on time taken for data encryption and decryption, efficiency in terms of security, memory usage, power consumption, jitter and latency. This report also focused on searching for studies about data encryption techniques available and their commonly used algorithms and comparatively compares each algorithm based on the parameters in common. The comparison of commonly used symmetric encryption algorithms Blowfish, AES, DES and 3DES concluded that Blowfish is best in all parameters (encryption time, decryption time, memory usage, power consumption, latency, jitter and security level). On the other hand, the comparison asymmetric algorithms RSA ECC and Elgamal showed that ECC is best in almost in parameters in comparison with RSA except in signature verification time. The hashing algorithm of SHA256 are more secure than SHA1 and MD5.