Method to Improve the Performance of the Data Encryption Algorithm
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
Disclosed is a method to speed up the execution of the Data Encryption Algorithm (DEA) [*] when implemented on a 16-bit processor such as the IBM Personal Computer (PC). The method requires replacing the "Initial Permutation" of the DEA by one of a class of Modified Initial Permutations; likewise, the "Final Permutation" is replaced by a Modified Final Permutation.