Operating method of memory controller, cloud computing device and edge computer
An operating method of a memory controller includes generating a random value using a seed, generating encrypted intermediate data by encrypting plaintext data using the random value, and storing the seed and the intermediate data in a memory device. Ciphertext data is generated using the seed and the intermediate data based on Ring Learning with Error (RLWE).
1. An operating method of a memory controller, comprising:
generating a random value using a seed;
generating encrypted intermediate data by encrypting plaintext data using the random value; and
storing the seed and the intermediate data in a memory device, wherein ciphertext data is generated using the seed and the intermediate data based on Ring Learning with Error (RLWE);
after storing the seed and the intermediate data in the memory device, reading the seed and the intermediate data from the memory device;
regenerating a random value using the read seed;
generating RLWE-based ciphertext data using the regenerated random value and the read intermediate data; and
generating additional plaintext data by decrypting the generated ciphertext data.
2. The operating method of claim 1 , wherein the seed includes at least one of an address, a timestamp, or metadata corresponding to the plaintext data.
3. The operating method of claim 1 , wherein the seed includes at least one of a page address or a unique ID of a NAND flash memory.
4. The operating method of claim 1 , further comprising:
encoding user data,
wherein the plaintext data is generated using the user data, and the seed includes at least one of an address, a timestamp, or metadata corresponding to the user data.
5. The operating method of claim 1 , wherein the plaintext data, the random value, and the intermediate data are equal in length.
6. The operating method of claim 1 , further comprising:
before storing the seed and the intermediate data in the memory device,
generating parity data using at least one of the seed or the intermediate data; and
storing the parity data in the memory device.
7. The operating method of claim 1 , wherein the random value is generated using pseudo random number generation.
8. An operating method of a memory controller, comprising:
generating a random value using a seed, wherein the seed is an address corresponding to user data or plaintext data obtained by encoding the user data;
generating encrypted intermediate data by encrypting the plaintext data using the random value; and
storing the intermediate data in an area corresponding to the address in a memory device, wherein ciphertext data is generated using the seed and the intermediate data based on Ring Learning with Error (RLWE), and
the seed is not stored in the memory device;
after storing the intermediate data in the memory device,
receiving a command instruction to read the intermediate data stored in the area corresponding to the address;
reading the intermediate data stored in the area corresponding to the address from the memory device;
regenerating a random value using the address as an additional seed; and
generating additional plaintext data by performing a decryption operation using the regenerated random value and the read intermediate data.
9. The operating method of claim 8 , wherein the plaintext data, the random value, and the intermediate data are equal in length.
10. The operating method of claim 8 , wherein the random value is generated using pseudo random number generation.