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    DATA CRYPTOGRAPHY OPERATIONS USING CONTROL VECTORS
    14.
    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
    15.
    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
    16.
    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

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