Image Security Using Data Encryption Standard (DES)Secret Key-Ciphering

ABSTRACT:
Encryption is used to transmit data securely on open networks. Information contents may be textual data or image data. Encryption of text or images, which cover the highest portion of multimedia file transfer, is most important, during secure transmission of information. Several techniques have been used to protect confidential image data from unauthorized access. In this paper, the Data Encryption Standard (DES) algorithm was used as an encryption method for iris images, the encryption and decryption speed and the memory used up in the process, being observed. The system, which was implemented using the MATLAB environment, indicates a slower time for encryption but a faster time for decryption using the DES algorithm, thus showing that it is faster to decrypt than to encrypt with the DES cipher key. This guarantees the security of images using the cipher key DES algorithm and thus establishes that the DES algorithm presented assures resilient security for the CASIA iris image.

Keywords: Cryptography, Symmetric, Encryption, Decryption, Data hiding.