Abstract: Disclosed herein is a method of determining a user profile based on a set of user-selected images, a method of selecting images from an image database of digital images based on a user profile, a computer system and a computer program product.

Abstract: Examples of devices are described. In some examples, an electronic device includes a processor to generate a public key associated with an installation of a program. In some examples, the electronic device includes a communication interface to instruct a computing device to create an identity block in a blockchain based on the public key. In some examples, the communication interface is to send program information to a verification device to produce a verification block associated with the identity block in the blockchain.

Abstract: According to examples, an apparatus includes a processor that is to receive a transaction for a smart contract on a blockchain to progress a state of a workflow instance of the smart contract. The processor is to identify a rule correlated to the received transaction among a set of rules for the smart contract and is to load the identified rule correlated to the received transaction into the smart contract. The processor is to determine whether the received transaction is valid based on application of the identified rule in the smart contract. Based on a determination that the received transaction is valid based on application of the identified rule, the processor is to progress the state of the workflow instance of the smart contract.

Abstract: Disclosed herein is a method of determining a user profile based on a set of user-selected images, a method of selecting images from an image database of digital images based on a user profile, a computer system and a computer program product.

Abstract: A computerized method (10) is provided which improves data security in electronic transactions in an insecure network (12). This is accomplished when the method (10) operates on a user (18) which has established a commercial relationship with a trusted third party broker (22), and merchants (20a-20d). The method utilizes network links (14, 24) between (a) the trusted third party broker and the user and (b) the trusted third party broker and the merchants. Protocols are selected to operate between each network link, the selection being made, at least in part, on the basis of the computer resources which may be expected to be available in each network link.