JPS6474582A - Cryptograph - Google Patents
CryptographInfo
- Publication number
- JPS6474582A JPS6474582A JP62232957A JP23295787A JPS6474582A JP S6474582 A JPS6474582 A JP S6474582A JP 62232957 A JP62232957 A JP 62232957A JP 23295787 A JP23295787 A JP 23295787A JP S6474582 A JPS6474582 A JP S6474582A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- key
- ciphering
- deciphering
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To attain a ciphering device having key length consisting of 2N bits by a ciphering/deciphering means having key length consisting of N bits by dividing an inputted 2N-bit key block into two parts, extending N bits of one divided part by a prescribed value and ciphering and deciphering the extended bits as a parameter. CONSTITUTION: An input of 128 bits or the like is divided into two 64-bit key blocks KL, KR by a key block dividing means 20 in a ciphering/deciphering means 1 consisting of 64 bits or the like. The block KR transmitted through a key parity processing means 30-2 is extended to 96 bits or the like more than 3/2 x 64 bits by a key processing extending means 40 and the extended block KR is supplied to a key processing part 50 in a ciphering/deciphering means 10 to which the block KR transmitted through a parity processing means 30-1 is also supplied. A normal sentence consisting of 128 bits applied to a data randomizing part 60 is ciphered by 12 parameters of 16-bit length or the like outputted from the processing part 50. Since deciphering is similarly executed, the 2N-bit ciphering device can be attained by the ciphering/deciphering means having N-bit key length.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232957A JP2834450B2 (en) | 1987-09-16 | 1987-09-16 | Encryption device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232957A JP2834450B2 (en) | 1987-09-16 | 1987-09-16 | Encryption device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6474582A true JPS6474582A (en) | 1989-03-20 |
JP2834450B2 JP2834450B2 (en) | 1998-12-09 |
Family
ID=16947516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62232957A Expired - Lifetime JP2834450B2 (en) | 1987-09-16 | 1987-09-16 | Encryption device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2834450B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007512721A (en) * | 2003-08-25 | 2007-05-17 | ソニー エレクトロニクス インク | Apparatus and method for iterative encryption block |
JP2011155650A (en) * | 1998-08-19 | 2011-08-11 | Qualcomm Inc | Secure processing for authentication of wireless communication device |
-
1987
- 1987-09-16 JP JP62232957A patent/JP2834450B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011155650A (en) * | 1998-08-19 | 2011-08-11 | Qualcomm Inc | Secure processing for authentication of wireless communication device |
JP2007512721A (en) * | 2003-08-25 | 2007-05-17 | ソニー エレクトロニクス インク | Apparatus and method for iterative encryption block |
JP2011055541A (en) * | 2003-08-25 | 2011-03-17 | Sony Electronics Inc | Apparatus and method for iterative cryptographic block |
JP4794443B2 (en) * | 2003-08-25 | 2011-10-19 | ソニー エレクトロニクス インク | Apparatus and method for iterative encryption block |
Also Published As
Publication number | Publication date |
---|---|
JP2834450B2 (en) | 1998-12-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |