1. A method comprising: selecting a cryptographic algorithm for which a white-box implementation is not known; and configuring a computer processor to provide a white-box implementation of a cryptographic system that implements the selected cryptographic algorithm, said configuring comprising configuring the computer processor to execute one or more instructions that cause the computer processor to perform: a white-box implementation of a function, wherein the white-box implementation of the function is configured for accessing data identifying at least one of a device and a user to obtain identification data, and establishing an outcome of the function in dependence on the identification data; an implementation of the selected cryptographic algorithm; an implementation of a combining operation for establishing cryptographically processed data in dependence on a single outcome of the function and in dependence on a plurality of outcomes of the cryptographic algorithm, the combining operation comprising combining the plurality of outcomes of the cryptographic algorithm with the single outcome of the function; and an implementation of a signal generator for generating a signal comprising a representation of an outcome of the combining operation.