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Breaking 256-bit Elliptic Curve Encryption with a Quantum Computer
published on 2022-02-09 12:25:33 UTC by Bruce SchneierContent:
Researchers have calculated the quantum computer size necessary to break 256-bit elliptic curve public-key cryptography:
Finally, we calculate the number of physical qubits required to break the 256-bit elliptic curve encryption of keys in the Bitcoin network within the small available time frame in which it would actually pose a threat to do so. It would require 317 × 106 physical qubits to break the encryption within one hour using the surface code, a code cycle time of 1 μs, a reaction time of 10 μs, and a physical gate error of 10-3. To instead break the encryption within one day, it would require 13 × 106 physical qubits.
In other words: no time soon. Not even remotely soon. IBM’s largest ever superconducting quantum computer is 127 physical qubits.
https://www.schneier.com/blog/archives/2022/02/breaking-245-bit-elliptic-curve-encryption-with-a-quantum-computer.html
Published: 2022 02 09 12:25:33
Received: 2022 02 09 12:27:34
Feed: Schneier on Security
Source: Schneier on Security
Category: Cyber Security
Topic: Cyber Security
Views: 2
