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APPARATUS AND METHOD FOR GENERATING CRYPTOGRAPHIC ALGORITHM, APPARATUS AND METHOD FOR ENCRYPTION

  • US 20200136801A1
  • Filed: 10/25/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/26/2018
  • Status: Active Grant
First Claim
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1. A method of generating a cryptographic algorithm, the method comprising:

  • generating one or more key tables on the basis of a seed value;

    generating, by using a round tweak bit string and an input bit string that is input to one of input branches of a Feistel structure, a first transformation function that converts the input bit string into a first random bit string having a length that extends beyond a length of the input bit string;

    generating a second transformation function that converts a second random bit string generated by referencing the one or more key tables into a third random bit string having a length that is the same as the length of the input bit string; and

    generating a block cryptographic algorithm of a Feistel structure which includes a round function to which the one or more key tables, the first transformation function, and the second transformation function are applied.

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