• Cryptography and Steganography: Security in Electronic Transactions 

      Barbosa, Angel O.; Acevedo, Idelfonso; Rodríguez, Janneth; Shehadeh, Abed; Cruz, Alfredo (Polytechnic University of Puerto Rico, 2000-12)
      A new use for two ancient arts and sciences; Cryptography and Steganography are now as useful as they were thousands of years ago. The digital communication security rests mainly on the developments of these two methodologies ...