JPS6474582A - Cryptograph - Google Patents

Cryptograph

Info

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
Application number
JP62232957A
Other languages
Japanese (ja)
Other versions
JP2834450B2 (en
Inventor
Shoji Miyaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP62232957A priority Critical patent/JP2834450B2/en
Publication of JPS6474582A publication Critical patent/JPS6474582A/en
Application granted granted Critical
Publication of JP2834450B2 publication Critical patent/JP2834450B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
JP62232957A 1987-09-16 1987-09-16 Encryption device Expired - Lifetime JP2834450B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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