Nowadays,　a　tremendous　amount　of　data　is　produced　every　single　day　by　computational　systems　and　electronic　instruments,　whether　its　an　online　transaction　or　data　manipulation　over　the　internet,　security　has　dependably　remained　the　best　concern　in　any　correspondence　communication　system.　The　amount　of　information　to　be　exchanged　is　not　the　problem.　The　essential　variable　is　the　Channel,　through　which　the　data　is　transferred,　ought　to　be　secured.　So　in　terms　of　secure　transmission　of　data,　the　best　technique　usually　used　these　days　is　cryptography.　Cryptography　is　a　procedure　of　making　data　incomprehensible　to　an　unapproved　individual.　Different　cryptographic　algorithms　can　be　utilized　in　a　very　efficient　manner.　In　a　perfect　world,　a　user　needs　the　best　cryptographic　algorithm　with　low　cost　and　high　in　performance　measure.　So　for　the　critical　needs　of　the　user,　the　cryptographic　algorithm　chose　the　best　algorithm　amongst　existing　algorithms.　This　research　paper　presents　a　neat　and　clean　study　of　various　cryptographic　algorithms　(DES,　3DES,　AES,　RSA)　based　on　the　computational　complexity　and　performance　measure.　©　2020　IEEE.