Abstract: A computer apparatus, program and method function in a data processing system to replicate a cryptographic facility. The system includes a first cryptographic facility containing a portable part which personalizes the first cryptographic facility. The system also includes a second cryptographic facility which is linked to the first cryptographic facility by a public key cryptographic system. The portable part of the first cryptographic facility is encrypted and transferred to the second cryptographic facility, where it is decrypted and used to personalize the second cryptographic facility to enable replication of the first cryptographic facility. In one application, personalization of the second cryptographic facility can be in response to the detection of a failure in the first cryptographic facility. In another application, multiple cryptographic facilities can be brought on-line for parallel operation in the data processing system.

Abstract: A data processing system, method and program are disclosed, for managing a public key cryptographic system. The method includes the steps of generating a first public key and a first private key as a first pair in the data processing system, for use with a first public key algorithm and further generating a second public key and a second private key as a second pair in the data processing system, for use with a second public key algorithm. The method then continues by assigning a private control vector for the first private key and the second private key in the data processing system, for defining permitted uses for the first and second private keys. Then the method continues by forming a private key record which includes the first private key and the second private key in the data processing system, and encrypting the private key record under a first master key expression which is a function of the private control vector.

Abstract: Device A in a public key cryptographic network will be constrained to continue to faithfully practice a security policy dictated by a network certification center, long after device A's public key PUMa has been certified. If device A alters its operations from the limits encoded in its configuration vector, for example by loading a new configuration vector, device A will be denied participation in the network. To accomplish this enforcement of the network security policy dictated by the certification center, it is necessary for the certification center to verify at the time device A requests certification of its public key PUMa, that device A is configured with the currently authorized configuration vector. Device A is required to transmit to the certification center a copy of device A's current configuration vector, in an audit record. the certification center then compares device A's copy of the configuration vector with the authorized configuration vector for device A stored at the certification center.

Abstract: An improved security system is disclosed which uses an IC card to enhance the security functions involving component authentication, user verification, user authorization and access control, protection of message secrecy and integrity, management of cryptographic keys, and auditability. Both the security method and the apparatus for embodying these functions across a total system or network using a common cryptographic architecture are disclosed. Authorization to perform these functions in the various security component device nodes in the network can be distributed to the various nodes at which they will be executed in order to personalize the use of the components.

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.

Abstract: A method and apparatus in a public crypto system, control the use of a public key, based on the level of import integrity for the public key. The method and apparatus generate a control vector associated with the public key, having a history field. The public key and the control vector are transmitted from the location of generation over a communications link to a receiving location, using the selected one of a plurality of levels of import integrity for the transmission. At the receiving location, the public key and the control vector are tested to determine the actual level of import integrity for the transmission. Then, a value is written into the history field of the control vector which characterizes the actual level of import integrity.

Abstract: An improved security system is disclosed which uses an IC card to enchance the security functions involving component authentication, user verification, user authorization and access control, protection of message secrecy and integrity, management of cryptographic keys, and auditablity. Both the security method and the apparatus for embodying these functions across a total system or network using a common cryptographic architecture are disclosed. Authorization to perform there functions in the various security component device nodes in the network can be distributed to the various nodes at which they will be executed in order to personalize the use of the components.