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1. 发明专利

JPH11239128A INFORMATION PROTECTION METHOD FOR REMOTE DIAGNOSING SYSTEM AND ITS SYSTEM DEVICE 失效
公开(公告)号：JPH11239128A
公开(公告)日：1999-08-31
申请号：JP3940698
申请日：1998-02-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA SHUNSUKE , TANAKA KIYOTO , YAMANAKA KIYOSHI
IPC分类号： A61B5/00 , G09C1/00 , H04L9/32
摘要： PROBLEM TO BE SOLVED: To provide an information protection method and an information protection system device by which a remote diagnosing system utilizing an information communication network is enabled to transmit privacy information without disclosing the information to a third person and, at the same time, the alteration of the privacy information by the transmitter of the information can be prevented by preventing access to preserved information from the third person. SOLUTION: An information protection system device is constituted of a public key certificate generator 1 and a plurality of information communication equipment 2 and 3. The generator 1 generates the public key certificates of the generator 1 itself and the communication equipment 2 and 3 and the equipment 2 and 3 commonly encipher the privacy information, decode the enciphered information, and produce signatures and, at the same time, make cryptocommunication between them 2 and 3 and preserve the enciphered data and signatures.

2. 发明专利

JPH1141231A ORIGINAL INFORMATION PROTECTION METHOD AND DEVICE FOR INFORMATION DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH1141231A
公开(公告)日：1999-02-12
申请号：JP20844797
申请日：1997-07-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA SHUNSUKE , NAKAMURA TAKAO , OGAWA HIROSHI , KAWAKUBO HIDEJI
IPC分类号： H04L9/08 , G09C1/00 , H04L9/32
摘要： PROBLEM TO BE SOLVED: To prevent a user from copying illicitly the original information based on the purchased encipherment information by using an external device to decode the enciphered distributed information, to embed a user authenticator into the decoded original information and also to manage the keys which are used for both decoding and embedding processes. SOLUTION: This original information protection device (external device) 50 consists mainly of an information decoding part 57 and an information embedding part 58. When the device 50 is produced, a master key that is inherent to the device 50 is stored in a master key storage part 54 of a security device 52. At an enciphering/decoding part 55, a user's secret key is enciphered by the master key that is stored in the part 54 and this enciphered key is stored in a storage part 59. The control part of a user terminal receives the enciphered key via an open key and sends this received key to the device 50. A terminal input/output control part 51 of the device 50 sends the received key to a control part 53.

3. 发明专利

JPH1127259A CARD INFORMATION PROCESSING TRANSFER METHOD AND CARD UTILIZATION TERMINAL 失效
公开(公告)号：JPH1127259A
公开(公告)日：1999-01-29
申请号：JP18010697
申请日：1997-07-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA SHUNSUKE , KAWAKUBO HIDEJI , YAMANAKA KIYOSHI
IPC分类号： G06K17/00 , H03M7/30 , H04L9/36
摘要： PROBLEM TO BE SOLVED: To reduce time and the cost of transfer by compressing and ciphering card information when the card information is transferred. SOLUTION: All pieces of information required for an authentication processing from a card inserted and set in a card utilization terminal 10 is read from a card information input/output part 11. One of plural compression means is selected and compressed by a control part 21 of a compression and ciphering device 20. In this case, a process to execute compression is held in a compression means storage part 23 by providing plural generally used reversal compression means, or the card utilization terminal 10 and an authentication center with the same code list. When data length of the data after compression is equal to 128 byte or more, another compression means is selected and the data is compressed again by the control part 21 and after the data is compressed to the data length of 128 byte or less, the card information is ciphered with a ciphering key described in a ciphering key storage part 25 by a card information ciphering part 24. The compressed/ciphered card information is transmitted from a communication input/output part 13 to a communication route by a communication control part 12.

4. 发明专利

JPH10134157A METHOD AND DEVICE FOR CIPHER AUTHENTICATING PROCESS UTILIZING COMPUTER CARD 失效
公开(公告)号：JPH10134157A
公开(公告)日：1998-05-22
申请号：JP28529996
申请日：1996-10-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA SHUNSUKE , KAWAKUBO HIDEJI , TANAKA KIYOTO , YAMANAKA KIYOSHI
IPC分类号： G06K19/10 , G06K17/00 , G09C1/00 , H04L9/10 , H04L9/32
摘要： PROBLEM TO BE SOLVED: To provide the method and device for cipher authentication which enables only proper users to use cipher systems without making secret information in a cipher device leak to a 3rd party, and enables the systems to function at the same time by more than one application system. SOLUTION: A user inquires a cipher system of a cipher system management part 19, sets a use mode in a communication control part 11 to start communicating, and sends the user ID to an access control part 12. The access control part 12 gives the user the right to access secret information only when the user ID matches the user ID stored in a secret information storage part 23. The user accesses open information and the secret information by the given right to access, and performs a key generating process and a cipher authenticating process.

5. 发明专利

JPH11154184A METHOD AND SYSTEM FOR MANAGING SAFETY OF INFORMATION DISTRIBUTION 失效
公开(公告)号：JPH11154184A
公开(公告)日：1999-06-08
申请号：JP32283397
申请日：1997-11-25
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： TAKADA SHUNSUKE , KAWAKUBO HIDEJI , YAMANAKA KIYOSHI , MATSUMOTO HIROYUKI
IPC分类号： B65G61/00 , G06F15/00 , G06F17/30 , G06F21/00 , G06F21/10 , G06F21/62 , G06Q10/00 , G06Q20/00 , G06Q20/02 , G06Q20/30 , G06Q20/36 , G06Q30/06 , G06Q50/00 , G09C1/00 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To provide a method and a system for managing safety of information distribution with which contents can be safely delivered and utilized in the information distribution in electronic commercial transaction. SOLUTION: A center 1 having an enciphered distribution sales function, advertisement and propaganda function and payment collection settlement function and a user terminal 5' having a control program 4' for controlling an enciphered distribution purchase function, transfer function and drawing-out/ payment enciphering function are mutually connected by an information communication network N, and an external device 6 having a deciphering program 2' for deciphering enciphered sales contents Ke [M], which is transferred from the user terminal 5', with a previously or simultaneously transferred content cryptographic key Kup [Ke] enciphered in advance by operating while being interlocked with the control program 4', electronic wallet 3' for updating, enciphering and storing the payment subtracted remainder, and function for enciphering and storing various kinds of information is separately connected to the user terminal 5'.

6. 发明专利

JPH1139158A METHOD FOR PROTECTING EXECUTED PROGRAM AND ITS DEVICE 失效
公开(公告)号：JPH1139158A
公开(公告)日：1999-02-12
申请号：JP21000697
申请日：1997-07-18
申请人： NIPPON TELEGRAPH & TELEPHONE , N T T ELECTRON KK
发明人： KAWAKUBO HIDEJI , TAKADA SHUNSUKE , YAMANAKA KIYOSHI , MATSUMOTO HIROYUKI
IPC分类号： G06F12/14 , G06F9/06 , G06F21/22 , G06F21/24
摘要： PROBLEM TO BE SOLVED: To stop reading of secret information of a processor itself by immediately stopping execution of an execution program when the execution program is detected to be forged before the specified execution program is run. SOLUTION: A message digest processing is executed by branching a system into reset entry addresses of incorporated RUM/PROM after the system is reset. In this case, a message digest MD' is assigned to data byte obtained at the end of each processing. A message digest MD at editing is collated with the message digest MD' before which the message digest processing is executed whenever the execution program is run. And when the message digest MD at the editing and the message digest MD' after the message digest processing are not coincide, the execution program is judged to be forged and the execution of the execution program after that is stopped.

7. 发明专利

JPH10275115A DATA CIPHERING AND STORING METHOD AND SYSTEM DEVICE 失效
公开(公告)号：JPH10275115A
公开(公告)日：1998-10-13
申请号：JP8024197
申请日：1997-03-31
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAWAKUBO HIDEJI , TAKADA SHUNSUKE , YAMANAKA KIYOSHI
IPC分类号： G06F12/14 , G06F21/24 , G09C1/00 , H04L9/10
摘要： PROBLEM TO BE SOLVED: To provide the data ciphering and storing method and system device which can prudentially manage ciphered data stored in an external storage device by using a computer card. SOLUTION: Under the control of a control part 33, plaintext data Xa and Xb are ciphered sequentially by using a ciphering key Ka stored in a ciphering and deciphering key storage part 35 to generate corresponding ciphered data Ya and Yb in a process of transfer of the plaintext Xa and Xb expanded in the main storage device of an information terminal device to the external storage device 12. In a process of transfer of ciphered data Ya and Yb written temporarily in the external storage device 12 to the information processor 11, the ciphered data Ya and Yb are deciphered sequentially by using a deciphering key Kb stored in the ciphering and deciphering key storage part 35 to restore the original plaintext data Xa and Xb by a ciphering process part 34, which is constituted in a small-sized, lightweight computer card 13 having an authenticating function of the user individual.

8. 发明专利

JPH10271106A CIPHER COMMUNICATION METHOD AND SYSTEM EQUIPMENT 失效
公开(公告)号：JPH10271106A
公开(公告)日：1998-10-09
申请号：JP6846097
申请日：1997-03-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKADA SHUNSUKE , KAWAKUBO HIDEJI
IPC分类号： H04L9/08 , H04L9/10
摘要： PROBLEM TO BE SOLVED: To perform the cipher communication of high safety by packaging and loading a secrecy protected ciphering/deciphering device to a computer card incorporated in a communication controller for connecting an information terminal equipment to a communication path and performing ciphering/ deciphering processings together for the transfer of the input/output of secret data between the information terminal equipment and the communication path. SOLUTION: Through the terminal and communication input/output parts 11 and 14 and communication control part 13 of a cipher communication equipment 9 packaged to the computer card 10 and by the control, the information terminal equipments are connected by the communication path 8. A random number generation part 12 generates a random number and generates a cipher key, a storage part 15 stores the secret key and program of a transmission side for ciphering/deciphering and the storage part 19 stores the public key of a reception opposite side. A ciphering/deciphering part 16 executes the processing of ciphering/deciphering by using the cipher key and the public key by the control of a control part 17 and the ciphering/deciphering device 18 physically protects the secrecy of the respective parts inside. Thus, without uselessly consuming hardware resources, safe communication is made possible.

9. 发明专利

JPH10228374A COMPUTER CARD PREVENTED FROM BEING DUPLICATED 失效
公开(公告)号：JPH10228374A
公开(公告)日：1998-08-25
申请号：JP2913597
申请日：1997-02-13
申请人： NIPPON TELEGRAPH & TELEPHONE , N T T ELECTRON KK
发明人： KAWAKUBO HIDEJI , TAKADA SHUNSUKE , TANAKA KIYOTO , YAMANAKA KIYOSHI , MATSUMOTO HIROYUKI
IPC分类号： G06F12/14 , G06F9/06 , G06F21/22 , G06F21/24
摘要： PROBLEM TO BE SOLVED: To compensate the indefiniteness of a ROM by an external ROM and to attain safety by simple processing. SOLUTION: When an execution program for ciphering processing such as ciphering/deciphering processing, certification processing and signature processing can not be stored in a ROM 110 built in an one-chip microcomputer 101, the program is ciphered and stored in an external ROM 106. At the time of using the program, user's qualification is checked by a certification part 103 by using ID and a password, and when the user passes the certification, the specified ciphered execution program is extracted from the storage part 106 and deciphered by a key stored in a key storage part 102 and the deciphered execution program is stored in a main memory consisting of an internal execution memory 104 and the external RAM 107 to execute the program.

10. 发明专利

JPH04359318A REDISPLAY TYPE EDITING METHOD 失效
公开(公告)号：JPH04359318A
公开(公告)日：1992-12-11
申请号：JP13425791
申请日：1991-06-05
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KANEDA SHIGEO , NAKANO KATSUYUKI , TANAKA YASUYUKI , TAKADA SHUNSUKE
IPC分类号： G06F3/14 , G06F9/06 , G06F17/21
摘要： PURPOSE:To freely correct inputted data, to easily generate an application program, and to make display easy to see at the time of correction. CONSTITUTION:Input items are successively stored in a new mode and when an item to be corrected is designated by a cursor and a correction key is operated, the stored value of this item is erased, and a special value is returned to the application program. The application program is returned to a first position (break point) and is run again, and the redisplay mode is set at this time. In this mode, an input request from the application program is compared with stored items, and display is not changed and stored values are returned if they coincide with each other with respect to order. When the order of items is changed, following display is erased and a user is allowed to input data in accordance with the input request.

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