A Survey: Network Security and Cryptography Technique
Satish Kumar Yadav · International Journal for Research in Applied Science and Engineering Technology · 2018
Cryptography can be defined as the science of writing in secret code and protecting the information by transforming it in a secure and inaccessible format for those who are not intended can't read and process it. Importance of digital communication has increased for a secure and unaltered transmission of data between sender and receiver. Security is of the great significance for exchange of information among the sender and receiver. This review paper contains the details of work done in the field of cryptography along with proposed algorithms. Asymmetric and symmetric algorithms are analysed in detail and included. In some algorithms, modulus operations are performed on the integral values followed by the ASCII value generation of the plaintext characters. In many algorithms substitution is also used along with the new methodology for text encrypts and decrypt using ASCII algorithm also the combination of vigener and Caesar cipher encryption techniques. The concept of intermediate text is also used. By studying various research papers, reviews are made and more secure ways are to be proposed in near future. After detailed analysis, comparison is done, conclusion is made and an algorithm is proposed using the ASCII values and the modified Vigener table for highly secure way of cryptographic practice along with an idea of less number of steps. Less number of steps directly affects the complexity of the algorithm and an efficient algorithm can be obtained.