Patent ID: 8745410
Filing Date: 2014-06-03
Classification: G06F

Abstract:
1. A circuit device comprising: an interface for receiving input data, a scrambling key, and first constant data that is unique to the circuit device, the first constant data being user configurable and a combination of an identifier stored in a user-configurable and software accessible register of the circuit device that uniquely identifies the circuit device and second unique constant data based on calibrated fuse bits, where the calibrated fuse bits are programmed based on manufacturing factors, where the manufacturing factors include one or more of the following: process variation, wafer lot, and position of the circuit device on a wafer; a first circuit arrangement coupled to the interface and operable for receiving the input data and the scrambling key, the first circuit arrangement operable for applying the scrambling key to the input data to produce first scrambled data; and a second circuit arrangement coupled to the first circuit arrangement and operable for receiving the first scrambled data, the second circuit arrangement operable for applying the first constant data to the first scrambled data to generate second scrambled data.