Abstract: Method and system for recording data describing a first entity, the data endorsed by a second entity comprising the second entity validating data describing the first entity, wherein an identifier is associated with the data, the identifier being generated from a public key of the first entity. Cryptographically signing data corresponding with the data describing the first entity using at least a private key of the second entity. Posting a transaction to a block chain including the cryptographically signed data. Method and system for obtaining data describing a first entity the data endorsed by a second entity comprising. Receiving an identifier of data describing the first entity. Retrieving an entry from a block chain based on the received identifier. Authenticating the entry using a public key of the second entity. Extracting the data describing the first entity from the retrieved entry.

Abstract: Method and system for recording data describing a first entity, the data endorsed by a second entity comprising the second entity validating data describing the first entity, wherein an identifier is associated with the data, the identifier being generated from a public key of the first entity. Cryptographically signing data corresponding with the data describing the first entity using at least a private key of the second entity. Posting a transaction to a block chain including the cryptographically signed data. Method and system for obtaining data describing a first entity the data endorsed by a second entity comprising. Receiving an identifier of data describing the first entity. Retrieving an entry from a block chain based on the received identifier. Authenticating the entry using a public key of the second entity. Extracting the data describing the first entity from the retrieved entry.

Abstract: Method and system for transferring digital currency from a payer to recipient comprising receiving an identifier of data describing the first entity. Retrieving an entry from a block chain based on the received identifier. Authenticating the entry using a public key of the second entity. Extracting the data describing the first entity from the retrieved entry. Authenticating a block in the block chain containing the entry using a public key of a third entity. If the authentication of the block in the block chain is successful then transferring digital currency from a payer to a recipient, wherein the first entity is the payer or the recipient, and wherein transferring digital currency from the payer to the recipient comprises the payer. Obtaining wallet public key data associated with the recipient. Generating, using at least the wallet public key data, a currency public key for the amount of digital currency to be transferred to the recipient.

Abstract: A method and apparatus are provided for controlling services provided at a first electronic device at a second electronic device. A plurality of electronic devices connected to a network provide services in the form of providing data to the network, or allowing the data to be manipulated. Each service is represented as a manipulable data object created at the device providing the service. Each object contains sufficient information to allow the service the object represents to be controlled. The objects are transmitted over the network and are stored in an object list maintained by a master device. Any compatible device may then retrieve an object from the object list and use the information contained in it to fully control the service.

Abstract: A hybrid yeast promoter comprising constituents of the 5' non-coding PGK region and, as an upstream activation sequence, the upstream activitation sequence of the GAL10 gene of Saccharomyces cerevisiae, and which does not contain the endogenous PGK upstream activation sequence. Preferably the GAL10 upstream activation sequence is provided at a site from which the PGK upstream activation sequence has been deleted. The hybrid promoter confers galactose regulation of gene transcription.