Method of writing data to a memory device and reading data from the memory device
A method of writing data to a memory device and reading data from the memory device includes issuing a challenge to a PUF device during a power-up process in order to derive a PUF response, error correcting the PUF response, providing delinearized addresses via a delinearization algorithm to the memory device using the error corrected PUF response, masking data, which is written to the memory device, via a masking module using the error corrected PUF response, de-masking data, which is read from the memory device, via the masking module ( 19 ) using the error corrected PUF response; and performing a check-sum verification of read data such that address delinearization and data masking are used together to obfuscate the memory content.
1. A method of writing data to a memory device and reading data from the memory device, comprising:
issuing a challenge to a Physical Unclonable Function (PUF) device during a power-up process to derive a PUF response;
error correcting the PUF response;
providing delinearized addresses via a delinearization algorithm to the memory device using the error corrected PUF response;
masking data, which is written to the memory device, via a masking module using the error corrected PUF response during a write operation;
de-masking data, which is read from the memory device, via the masking module using the error corrected PUF response during a read operation; and
performing a check-sum verification of read data.
2. The method of claim 1 , wherein the check-sum verification is performed by using a cyclic error-correcting code.
3. The method of claim 2 , further comprising:
generating a reset signal in case of data falsification to reset a processor which interacts with the memory device.
4. The method of claim 2 , wherein the data is masked with the error corrected PUF response using an XOR operator; and wherein the data is revealed out of masked data with the error corrected PUF response using the XOR operator.
5. The method of claim 1 , further comprising:
generating a reset signal in case of data falsification to reset a processor which interacts with the memory device.
6. The method of claim 5 , wherein the data is masked with the error corrected PUF response using an XOR operator; and wherein the data is revealed out of masked data with the error corrected PUF response using the XOR operator.
7. The method of claim 1 , wherein the data is masked with the error corrected PUF response using an XOR operator; and wherein the data is revealed out of masked data with the error corrected PUF response using the XOR operator.
8. The method of claim 1 , wherein the PUF device utilizes silicon physical unclonable functions of a system on chip which comprises a processor and a memory controller.
9. A system on chip comprising:
a processor;
a memory controller; and
a memory obfuscation module which is connected to a data bus and an address bus and is connected between the memory controller and memory devices;
wherein the memory obfuscation module is configured to:
issue a challenge to a Physical Unclonable Function (PUF) device during a power-up process to derive a PUF response;
error correct the PUF response;
provide delinearized addresses via a delinearization algorithm to a memory device using the error corrected PUF response;
mask data, which is written to the memory device, via a masking module using the error corrected PUF response;
de-mask data, which is read from the memory device, via the masking module using the error corrected PUF response; and
performing a check-sum verification of read data.
10. The system of claim 9 , wherein the obfuscation module comprises the PUF device, an address delinearization module and a data masking module.
11. The system of claim 10 , wherein the obfuscation module comprises an error correction module connected to the PUF device.