Simon-based hashing for fuse validation

A method for fuse value validation, the method comprising:

• receiving fuse values from a fuse array having a plurality of semiconductor fuses programmed with fuse values;
• generating one or more hash values by applying a Simon cipher using a hash circuit that receives the fuse values as keys;
• and
• generating a value indicative of whether the fuse values in the fuse array are valid based on outputs generated by applying the Simon cipher to each of the fuse values separately, including combining outputs generated by applying the Simon cipher to each of the fuse values into a digest register, wherein the combining comprises combining output of the digest register and output of a Simon cipher circuit through an accumulation circuit and back into the digest register.

A system comprising:

• an interconnect;
• a dynamic random access memory (DRAM) coupled to the interconnect;
• and
• a processor coupled to the interconnect, including
• a fuse array the fuse array comprising a plurality of semiconductor fuses with fuse values,
• a hash circuit coupled to the fuse array comprising
• a Simon cipher circuit operable to receive fuse values from the fuse array and to generate, from and back into a digest register, one or more hashes by applying a Simon cipher to each of the fuse values;
• and
• circuitry coupled to the Simon cipher circuit to combine outputs from the Simon cipher circuit for each value of the plurality of values at each of a plurality of rounds or cycles into the digest register to produce a hash digest that is indicative of whether the fuse values in the fuse array are valid.

A tangible, non-transitory, machine-readable medium having stored thereon an instruction, which if performed by a machine causes the machine to perform a method for fuse value validation, the method comprising:

• receiving fuse values from a fuse array having a plurality of semiconductor fuses programmed with fuse values;
• generating one or more hash values by applying a Simon cipher using a hash circuit that receives the fuse values as keys;
• and
• generating a value indicative of whether the fuse values in the fuse array are valid based on outputs generated by applying the Simon cipher to each of the fuse values separately, including combining outputs generated by applying the Simon cipher to each of the fuse values into a digest register, wherein the combining comprises combining output of the digest register and output of a Simon cipher circuit through an accumulation circuit and back into the digest register.