- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Proposed a Variable Length Block Cipher Algorithm | ||
| Journal of College of Education | ||
| Article 1, Volume 1, Issue 3, 2017, Pages 93-110 | ||
| Author | ||
| Rana Saad Mohammed | ||
| Abstract | ||
| This paper will introduce a propose algorithm to improve an elastic block cipher algorithm by benefiting from an efficient properties of a secure cryptographic mode New Plaintext-Ciphertext Block Chaining mode (NPCBC) and by creating a good key schedule and two new S-Boxes. This paper will describe the concept of a proposed elastic block cipher that refer to stretch the supported block size into any length up to twice of the original block size. Also it defines a method for converting any existing block cipher into a new elastic block cipher. The results show that the security is increased by using the multiplication-addition operations in NPCBC mode which it provides the confusion and diffusion properties that cause difficulty of attacks on a new algorithm. And Also by using a good key schedule and two new S-Boxes which they increase the complexity with keep on speed of a new algorithm when compare it with a traditional algorithm which it has a weakness point when encrypt multiple blocks with using a fixed secret key. | ||
| Keywords | ||
| Block Cipher Design; Fixed Length Block Cipher; Variable Length Block Cipher; Elastic Block Cipher; NPCBC mode; boxes; key schedule; NPCBC | ||
|
Statistics Article View: 129 PDF Download: 107 |
||