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Articles by Mohammed S. Mechee
Total Records ( 2 ) for Mohammed S. Mechee
  Mohammed S. Mechee , F. Ismail , Z. Siri and N. Senu
  A two sets of test problems are tested upon, the first set consists of problems on ordinary differential equations and the second set consists of problems on delay differential equations. The problems are solved using the new RKD method and numerical comparisons are made when the same problems are reduced to a first order system of ODEs and first order system of DDEs and solved using the existing Runge-Kutta methods of order three and four. The RKD method is adapted to solve delay differential equations (DDEs). Stability polynomial of the method for linear special third order DDEs is given. The numerical results have clearly shown the advantage and the efficiency of the new method in terms of accuracy and computational time.
  Ashwak Mahmood Alabaichi , Ramlan Mahmood , Faudziah Ahmad and Mohammed S. Mechee
  Randomness of the output is one of the significant factors in measuring the security of any cryptographic algorithm. Non-random block cipher is vulnerable to any type of attack. This paper presents the National Institute of Standard and Technology (NIST) statistical tests of the Blowfish algorithm to investigate its randomness. Blowfish algorithm with Electronic Codebook (ECB) and Cipher Block Chaining (CBC) modes were conducted for these tests. In addition, comparisons between them were introduced. The analysis showed that Blowfish algorithm with ECB mode was inappropriate with data such as text and image files which have large strings of identical bytes. This inconsistency is due to the majority of the 188 statistical tests of NIST statistical tests failing in all rounds.
 
 
 
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