Patent ID: 9208333
Filing Date: 2015-12-08
Classification: G06F,H04L

Abstract:
1. A data recorder comprising: a data capture device for capturing input data; one or more persistent data stores storing pseudo-random masking data deterministically generated by a psuedo-random data generator in dependence on one or more masking data generation parameters; one or more processors arranged in operation to combine said input data with said pseudo-random masking data to generate masked data using a masking process reversible with knowledge of said one or more masking data generation parameters; a persistent data store updater arranged in operation to erase said pseudo-random masking data in said one or more persistent data stores once it has been used in said masking process, and to write the masked data output by said one or more processors in said one or more persistent data stores; and an output for outputting said masked data from said one or more persistent data stores to a reader device having access to said one or more masking data generation parameters.