Abstract:
During generation of an implicit certificate (102, 638) for a requestor (100, 600), a certificate authority (104, 620) incorporates information in the public-key reconstruction data (110), where the public-key reconstruction data is to be used to compute the public key (648) of the requestor. The information may be related to one or more of the requestor, the certificate authority, and the implicit certificate. The certificate authority reversibly encodes the public- key reconstruction data in the implicit certificate and sends it to the requestor. After receiving the implicit certificate from the certificate authority, the requestor can extract the incorporated information from the public-key reconstruction data. The implicit certificate can be made available to a recipient (114, 654), and the recipient can also extract the incorporated information.
Abstract:
A method and apparatus are disclosed for using a single credential request ( e.g. , registered public key or ECQV certificate) to obtain a plurality of credentials in a secure digital communication system having a plurality of trusted certificate authority CA entities and one or more subscriber entities A. In this way, entity A can be provisioned onto multiple PKI networks by leveraging a single registered public key or implicit certificate as a credential request to one or more CA entities to obtain additional credentials, where each additional credential can be used to derive additional public key-private key pairs for the entity A.
Abstract:
A method of securing user credentials in a remote repository is provided. In accordance with one embodiment, there is provided a method comprising generating a first private key and a first public key pair from a registered password; generating a second private key and a second public key pair; generating a storage key from the second private key and the first public key; encrypting a set of credentials using the storage key; creating a encrypted credential signature from the encrypted set of credentials and the first private key; and storing the encrypted set of credentials, the encrypted credential signature, and the second public key in the remote repository.
Abstract:
A method and system for providing and issuing credentials wherein the first credential conforms to a first specified format and incorporates supplemental information to permit a requester or recipient of the first credential to create and utilize a second credential that conforms to a second specified format wherein the second specified format is different from the first specified format
Abstract:
A key injection service module for an asset management system is provided for a secure means of injecting keys into products. To provide this service, a controller is used to define one or more key types defining the format of the keys in a file. The controller is then used to define a product model, and then to bind each key type to the product models.
Abstract:
The generation of a shared secret key K in the implementation of a key agreement protocol, for example MQV, may be optimized for accelerated computation by selecting the ephemeral public key and the long-term public key of a correspondent to be identical. One correspondent determines whether the pair of public keys of the other correspondent are identical. If it is, a simplified representation of the shared key K is used which reduces the number of scalar multiplication operations for an additive group or exponentiation operations for a multiplicative group. Further optimisation may be obtained by performing simultaneous scalar multiplication or simultaneous exponentiation in the computation of K.
Abstract:
An authenticated RFID system is provided that uses elliptic curve cryptography (ECC) to reduce the signature size and read/write times when compared to traditional public key implementations such as RSA. Either ECDSA or ECPVS can be used to reduce the signature size and ECPVS can be used to hide a portion of the RFID tag that contains sensitive product identifying information. As a result, smaller tags can be used or multiple signatures can be written at different stages in a manufacturing or supply chain. A key management system is used to distribute the verification keys and aggregate signature schemes are also provided for adding multiple signatures to the RFID tags, for example in a supply chain.
Abstract:
A method of communicating in a secure communication system, comprises the steps of assembling a message at a sender, then determining a frame type, and including an indication of the frame type in a header of the message. The message is then sent to a recipient and the frame type used to perform a policy check.
Abstract:
A system and method for controlling a production process for producing a product is provided in which overproduction may be inhibited by introducing a separation of duties within a production process Typically a producer will contract out the various stages of a production process to multiple contractors. In general, separation of duties involves purposefully separating production stages, for silicon chips or other products, so that the end product has been handled or "touched", by each subcontractor, in order for the end product to be fully functional This is achieved by way of a module having a mathematical transform for intercepting and transforming data flow in the product The mathematical transform requiring a key to be operable, the product requiring successful operation of the mathematical transform to be operable and the key is divided into a plurality of portions of sensitive data which are added during production of the product in a plurality of stages
Abstract:
The invention provides a method of verifiable generation of public keys. According to the method, a self-signed signature is first generated and then used as input to the generation of a pair of private and public keys. Verification of the signature proves that the keys are generated from a key generation process utilizing the signature. A certification authority can validate and verify a public key generated from a verifiable key generation process.