Verifier for remotely verifying integrity of memory and method thereof

A system comprising:

• a device;
• and
• a verifier which is communicatively connected to the device via a network and remotely verifies an integrity of a memory,
• wherein the verifier fills out free areas in the memory with random numbers, generates a local check code to check the integrity of the memory, and checks the integrity of the memory by determining whether the local check code matches a remote check code for the integrity check of the memory, and that a remote check code generation time does not exceed a remote check code generation expectation time, and
• wherein the device generates the remote check code by receiving and using information used to generate the local check code.

A method which remotely verifies an integrity of a device that is connected via network using a verifier, the method comprising:

• filling free areas in a memory of the device with random numbers based on a prestored memory filling map and generating a local check code for the integrity check of the memory;
• transmitting integrity check parameters that are used by the device to generate a remote check code for the integrity check of the memory, to the device, and receiving the remote check code from the device;
• detecting a remote check code generation time by measuring a transmission time of the integrity check parameters and a reception time of the remote check code and comparing the detected remote check code generation time with a presorted remote check code generation expectation time;
• and
• confirming the integrity of the memory of the device if the remote check code generation time does not exceed the remote check code generation expectation time according to a result of the comparison and the local check code matches the remote check code.

A method for remotely verifying integrity of a memory by use of a system comprising a device and a verifier which is communicatively connected to the device via a network and remotely checks the integrity of a memory, the method comprising:

• filling, by the verifier, free areas in a memory of the device with random numbers based on a presorted memory filling map and generating a local check code for the integrity check of the memory;
• transmitting, by the verifier, integrity check parameters used by the device to generate a remote check code for the integrity check of the memory, to the device and measuring a transmission time of the integrity check parameters;
• generating, by the device, the remote check code using the received integrity check parameters and transmitting the generated remote check code to the verifier;
• detecting, by the verifier, a remote check code generation time by receiving the remote check code and measuring a reception time of the remote check code, and comparing the remote check generation time with a presorted remote check code generation expectation time;
• and
• confirming, by the verifier, the integrity of the memory of the device if the remote check code generation time does not exceed the remote check code generation expectation time according to a result of the comparison and the local check code matches the remote check code.