Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Decryption

Image Encryption Using Block Cipher Based Serpent Algorithm

Yossra Hussain Ali; Haider Aabdali Ressan

Engineering and Technology Journal, 2016, Volume 34, Issue 2, Pages 278-286

In an encryption scheme, the message or information, referred to as plaintext, is encrypted using an encryption algorithm, generating cipher textthat can only be read if decrypted.A proposal algorithm forimages protectionis depending on the block cipher serpent algorithm infeistel network structure, because numbers of round and linear transformation function and used block size of 512 bits rather than 128 bitshas more complexity for attacker or unauthorized person to discover original images.In modified serpent, the correlation coefficient decreases to below the traditional serpent algorithm. When 64*64 pixel bitmap image is used the correlation coefficient for gray level between plain image and cipher image is (0.0023) in modified serpent and (0.0814) in traditional serpent.

Proposed Hybrid-Encryption System for Multicast Network

Mohammad Natiq Fadhil Ibraheem

Engineering and Technology Journal, 2010, Volume 28, Issue 24, Pages 7027-7036

In this paper the proposed method based on two encrypted algorithms (Public key, and Block cipher) at the same time, it allowed a sender to encrypt the multicast packet and forward it into the packet network on the optimal distribution tree. The packet may be replicated at the optimal locations in the network and delivered to all the receivers. The receivers are capable of decrypting the packet and forwarding the
packet in the secure network environment. The sender must encrypt packets using a shared key that all the legitimate receivers use to decrypt thepackets. The security of the system is based on the ability to control the distribution of the keys only to those legitimate receivers.