Author : 
Eskicioglu, Ahmet M. ; Litwin, Louis
         
        
        
        
        
        
        
            Abstract : 
The field of cryptography deals with the techniques for conveying information securely. The goal is to allow the intended recipients of a message to receive the message properly while preventing eavesdroppers from understanding the message. Early classical ciphers´ substitution and transposition operations form the building blocks for today´s powerful ciphers such as the data encryption standard (DES). Key agreement schemes allow communicating parties to establish a shared cipher key
         
        
            Keywords : 
code standards; cryptography; telecommunication security; telecommunication standards; DES; cryptography; data encryption standard; information security; message transmission; shared cipher key; substitution operation; transposition operation; Application software; Cryptography; Frequency; Information analysis; Information security; Military computing; National security; Resists; Standards development; Writing;
         
        
        
            Journal_Title : 
Potentials, IEEE