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    12.
    发明专利
    未知

    公开(公告)号：DE69217428D1

    公开(公告)日：1997-03-27

    申请号：DE69217428

    申请日：1992-07-10

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  JOHNSON DONALD B ,  LE AN V ,  MARTIN WILLIAM C ,  PRYMAK ROSTISLAW ,  ROHLAND WILLIAM S ,  WILKINS JOHN D

    IPC: G06F21/20 ,  G06F9/30 ,  G09C1/00 ,  H04L9/08

    Abstract: The patent describes a method and apparatus for securely distributing an initial Data Encryption Algorithm (DEA) key-encrypting key by encrypting a key record (consisting of the key-encrypting key and control information associated with that key-encrypting key) using a public key algorithm and a public key belonging to the intended recipient of the key record. The patent further describes a method and apparatus for securely recovering the distributed key-encrypting key by the recipient by decrypting the received key record using the same public key algorithm and private key associated with the public key and re-encrypting the key-encrypting key under a key formed by arithmetically combining the recipient's master key with a control vector contained in the control information of the received key record. Thus the type and usage attributes assigned by the originator of the key-encrypting key in the form of a control vector are cryptographically coupled to the key-encrypting key such that the recipient may only use the received key-encrypting key in a manner defined by the key originator. The patent further describes a method and apparatus to improve the integrity of the key distribution process by applying a digital signature to the key record and by including identifying information (i.e., an originator identifier) in the control information of the key record. The integrity of the distribution process is enhanced by verifying the digital signature and originator identifier at the recipient node.

    DATA CRYPTOGRAPHY OPERATIONS USING CONTROL VECTORS
    17.
    发明专利
    DATA CRYPTOGRAPHY OPERATIONS USING CONTROL VECTORS 未知

    公开(公告)号：CA1322418C

    公开(公告)日：1993-09-21

    申请号：CA602905

    申请日：1989-06-15

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  THOMAS JULIAN ,  WILKINS JOHN D ,  YEH PHIL C

    IPC: G09C1/00 ,  H04L9/00 ,  H04L9/08 ,  H04L9/10 ,  H04L9/32

    Abstract: MA9-88-012 DATA CRYPTOGRAPHY OPERATIONS USING CONTROL VECTORS Data cryptography is achieved in an improved manner by associating with the data cryptography key, a control vector which provides the authorization for the uses of the key intended by the originator of the key. Among the uses specified by the control vector are limitations on encryption, decryption, authentication code generation and verification, translation of the user's data. Complex combinations of data manipulation functions are possible using the control vectors, in accordance with the invention. The system administrator can exercise flexibility in changing the implementation of his security policy by selecting appropriate control vectors in accordance with the invention. Complex scenarios such as encrypted mail box, session protection, file protection, ciphertext translation center, peer-to-peer ciphertext translation, message authentication, message authentication with non-repudiation and many others can be easily implemented by a system designer using the control vectors, in accordance with the invention.

    SECURE MANAGEMENT OF KEYS USING EXTENDED CONTROL VECTORS
    18.
    发明专利
    SECURE MANAGEMENT OF KEYS USING EXTENDED CONTROL VECTORS 未知

    公开(公告)号：CA1319198C

    公开(公告)日：1993-06-15

    申请号：CA600674

    申请日：1989-05-25

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  ARNOLD WILLIAM C ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  WHITE STEVE R ,  WILKINS JOHN D

    IPC: G09C1/00 ,  H04L9/08

    Abstract: MA9-88-023 SECURE MANAGEMENT OF KEYS USING EXTENDED CONTROL VECTORS A method and apparatus are disclosed for use in a data processing system which executes a program which outputs cryptographic service requests for operations with cryptographic keys which are associated with control vectors defining the functions which each key is allowed by its originator to perform. The improved method and apparatus enable the use of control vectors having an arbitrary length. It includes a control vector register having an arbitrary length, for storing a control vector of arbitrary length associated with an N-bit cryptographic key. It further includes a control vector checking means having an input coupled to the control vector register, for checking that the control vector authorizes the cryptographic function which is requested by the cryptographic service request. It further includes a hash function generator having an input coupled to the control vector register and an N-bit output, for mapping the control vector output from the control vector register, into an N-bit hash value. A key register is included for storing the N-bit cryptographic key. It further includes a logic block having a first input coupled to the N-bit output of the hash function generator, and a second input connected to the key register, for forming at the output thereof a product of the N-bit key and the N-bit hash value. Finally, an encryption device is included having a first input for receiving a cleartext data stream and a key input coupled to the output of the logic block, for forming a ciphertext data stream at the output thereof from the cleartext data stream and the product. A decryption device can be substituted for the encryption device to perform decryption operations in a similar manner.

    PERSONAL IDENTIFICATION NUMBER PROCESSING USING CONTROL VECTORS
    19.
    发明专利
    PERSONAL IDENTIFICATION NUMBER PROCESSING USING CONTROL VECTORS 未知

    公开(公告)号：CA1313411C

    公开(公告)日：1993-02-02

    申请号：CA600676

    申请日：1989-05-25

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  THOMAS JULIAN ,  WILKINS JOHN D ,  YEH PHIL C ,  SMITH RONALD M

    IPC: G09C1/00 ,  G07F7/10 ,  H04L9/00 ,  H04L9/32

    Abstract: PERSONAL IDENTIFICATION NUMBER PROCESSING USING CONTROL VECTORS Cryptographic PIN processing is achieved in an improved manner by associating control vectors with the PIN generating (verification) keys and PIN encrypting keys which provide authorization for the uses of the keys intended by the originator of the keys. The originator may be the local cryptographic facility (CF) and a utility program under the control of a security administrator, or the originator may be another network node. Among the uses specified by the control vector are limitations on the authority to use the associated key with certain PIN processing instructions, such as PIN generation, verification, translation and PIN block creation. Furthermore, the control vector may limit the authority of certain instructions to process clear PIN inputs (such as in PIN verification). The control vector may contain information identifying and, possibly restricting, PIN processing to a particular PIN format or particular processing algorithm. The control vector implementation provides a flexible method for coupling format, usage, and processing authorization to keys. The system administrator can exercise flexibility in changing the implementation of his security policy by selecting appropriate control vectors in accordance with the invention. Furthermore, a method is provided for the security administrator to restrict certain PIN format translations. MA9-88-013

    METHOD FOR AUTHENTICATING THE IDENTITY OF A USER OF AN INFORMATION SYSTEM
    20.
    发明专利
    METHOD FOR AUTHENTICATING THE IDENTITY OF A USER OF AN INFORMATION SYSTEM 未知

    公开(公告)号：CA1111563A

    公开(公告)日：1981-10-27

    申请号：CA324076

    申请日：1979-03-23

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  MEYER CARL H W

    IPC: G06F21/20 ,  G06F21/00 ,  G06Q20/34 ,  G06Q20/38 ,  G06Q20/40 ,  G07F7/10 ,  H04L9/00 ,  H04L9/32 ,  G06F3/00

    Abstract: Secure hardware is provided for cryptographically generating a verification pattern which is a function of a potential computer user's identity number, the potential computer user's separately entered password, and a stored test pattern. The test pattern for each authorised computer user is generated at a time when the physical security of the central computer and its data can be assured, such as in a physically guarded environment with no teleprocessing facilities operating. Secure hardware for generating verification patterns during authentication processing and for generating test patterns during the secure run is disclosed which uses a variation of the host computer master key to reduce risk of compromise of total system security. The use of a variant of the host master key prevents system programmers and/or computer operators from compromising the integrity of the authentication data base by, for example, interchanging entries and/or inserting new entries.

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