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We Know That With The Emergence Of Internet People All Around The World Are Using Its Services &are Heavily Dependent On It. People Are Also Storing Their Huge Amount Of Data Over The Cloud .It Is The Challenge For Researchers To Secure The Private And Critical Data Of The Users, So That Unauthorized Person Should Not Be Able To Access It And Manipulate It .Cryptography Is A Process Of Converting The User Useful Information To A Form Which Is Insignificant To An Unauthorized Person So That Only Authorized Persons Can Access And Understands It .For Ensuring Privacy There Are Multiple Cryptographic Algorithms, Which Is Selected As Per Requirement Of User Or Security Specification Of The Organization. This Paper Discusses The Comparison Of Various Cryptographic Encryption Algorithms With Respect To Its Various Key Features & Then Later Discusses Their Performance Cost Based On The Some Selected Key Criteria’s. Some Of The Algorithms Chosen For The Purpose Are DES, 3DES, IDEA, CAST128, AES, Blowfish, RSA, ABE &ECC.