Title:
暗号化装置
Document Type and Number:
Japanese Patent JP4796658
Kind Code:
B1
Abstract:
PROBLEM TO BE SOLVED: To provide a safe and secure encryption device, decryption device, encryption program and decryption program.SOLUTION: The encryption device performs a predetermined function processing to inputted numerical values D and X and outputs numerical values (S49 to S63). The encryption device inputs a numerical value for a predetermined number of times, inputs a numerical value A which is the target of encryption and at least a part of the numerical value X which constitutes a random key at an initial input (S43 and S45), and inputs the numerical values D and X, which have been outputted previously, at subsequent inputs (S45, S57, and S75). The encryption device puts a mark on a current number of loop times R when the numerical value D inputted in the function is a negative number (S59). The encryption device creates encryption #1 based on the numerical value D outputted at the last time (S91), creates encryption #2 based on the stored number of times R (S93), and creates a protocol key based on the random key.
Inventors:
Ghirardelli Sergio
Application Number:
JP2010274741A
Publication Date:
October 19, 2011
Filing Date:
December 09, 2010
Export Citation:
Assignee:
Ghirardelli Sergio
International Classes:
G09C1/00; H04L9/06
Domestic Patent References:
| JP2825205B2 | 1998-11-18 | |||
| JP2001175167A | 2001-06-29 |
Attorney, Agent or Firm:
Yutaka Tsubaki
Ishikawa Tatsuro
Miho Takeuchi
Tsuyoshi Shiraka
Ishikawa Tatsuro
Miho Takeuchi
Tsuyoshi Shiraka