Patent attributes
A method for encrypting data with a provided key. The method includes generating a plurality of keys; processing the data in a plurality of rounds, with each round including: performing a first logical combination of the data with a first key; first permuting the first logically combined data based on a first defined permutation; performing a first substitution on the first permuted data; second permuting the first substituted data based on a second defined permutation; performing a second logical combination of the second permuted data with a permuted second key; and performing a second substitution on the second logically combined data. Further, performing a penultimate logical combination of the second substituted data with a penultimate key, permuting the penultimate logically combined data, performing a final substitution of the permuted data, and performing a final logical combination of the final substituted data with a last key.