Abstract: A method of protecting an item of software, said item of software arranged to perform data processing based on one or more items of data, the method comprising: applying one or more software protection techniques to said item of software to generate a protected item of software, wherein said one or more software protection techniques are arranged so that said protected item of software implements said data processing at least in part as one or more linear algebra operations over a finite ring.

Abstract: A method for a first entity to protect a first amount of data and to enable a second entity to perform data processing based on the first amount of data, the method comprising the first entity: applying a predetermined function to the first amount of data to generate a first value; and generating a second amount of data for the second entity to process, said generating comprising combining, using a first combination function, each of a number N of elements of the first amount of data with the first value; wherein the predetermined function is a function for which application of the predetermined function to an input quantity of data generates a corresponding output value, and the predetermined function has a property that, given a second quantity of data generated by modifying each of N elements of a first quantity of data by combining, using the first combination function, each of those N of elements of the first quantity of data with the output value generated by applying the predetermined function to the f

Abstract: A method for a first entity to protect a first amount of data and to enable a second entity to perform data processing based on the first amount of data, the method comprising the first entity: applying a predetermined function to the first amount of data to generate a first value; and generating a second amount of data for the second entity to process, said generating comprising combining, using a first combination function, each of a number N of elements of the first amount of data with the first value; wherein the predetermined function is a function for which application of the predetermined function to an input quantity of data generates a corresponding output value, and the predetermined function has a property that, given a second quantity of data generated by modifying each of N elements of a first quantity of data by combining, using the first combination function, each of those N of elements of the first quantity of data with the output value generated by applying the predetermined function to the f

Abstract: A method of protecting an item of software, said item of software arranged to perform data processing based on one or more items of data, the method comprising: applying one or more software protection techniques to said item of software to generate a protected item of software, wherein said one or more software protection techniques are arranged so that said protected item of software implements said data processing at least in part as one or more linear algebra operations over a finite ring.