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US 2025/0156337 A1Published application
Memory device with cryptographic kill switch
AssigneeMicron Technology, Inc.
InventorGil Golov
Life of this patent
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Abstract
The disclosed embodiments describe devices and methods for preventing unauthorized access to memory devices. The disclosed embodiments utilize a one-time programmable (OTP) memory added to both a memory device and a processing device. The OTP memory stores encryption keys and the encryption and decryption of messages between the two devices are used as a heartbeat to determine that the memory device has not been separated from the processing device and, in some instances, connected to a malicious processing device.
Claims21
A system comprising:
- a first device comprising a first one-time programmable (OTP) memory;
- a second device comprising a second OTP memory;
- and
- logic configured to authenticate communications between the first device and second device using encryption keys stored in the OTP memories.
1 more element
A system comprising:
- an interface;
- a memory bank;
- and
- control logic configured to:
- detect that a challenge failed,
- disable the interface in response to the detection,
- decrypt a response after the detection, and
- modify operation of the memory bank.
5 more elements
A method comprising:
- receiving an encrypted command at a first device from a second device;
- decrypting the encrypted command to obtain a decrypted command;
- transmitting an encrypted response from the first device to the second device;
- and
- disabling an interface of the first device based on results of the decrypting.
2 more elements
Dependencies are inferred from the claim text.