Patent ID: 8249255
Filing Date: 2012-08-21
Classification: H04L

Abstract:
1. A method of encrypting a multi-digit plaintext string of multi-bit digits stored on a sending computer device using at least one multi-digit encryption key having a plurality of multibit encryption key digits, comprising: (a) on the sending computer device, adding one multi-bit digit of said plaintext string to a corresponding multi-bit digit of the at least one multi-digit encryption key to produce at least one ciphertext result digit; (b) on the sending computer device, truncating the most significant digit of the at least one ciphertext digit if the at least one ciphertext result digit is longer than one digit; (c) storing the at least one ciphertext result digit on the sending computer device; and (d) repeating steps (a) and (b) and (c) for the next multibit digit in the plaintext string until the end of the plaintext string is reached, wherein the encryption of the plaintext becomes more secure as the amount of plaintext which is encrypted increases.