What is Quantum Key Distribution (QKD)?
Key distribution is a foundational part of encryption, allowing cryptographic keys to be securely exchanged between two or more parties, to then allow them to encrypt and share information. Current key distribution methods use mathematics to protect key exchange. However, these have been found to be vulnerable to weak random numbers, advances in processing power and new attack strategies. Most importantly, current mathematical methods will not be safe from quantum computers.
Quantum Key Distribution (QKD) uses physics to exchange secret keys between two parties. Attempts to intercept or compromise the key exchange alters the state of the system, which then automatically compensates. QKD has been proven to be information-theoretic secure, meaning that the protocol cannot be broken even by an adversary with unlimited processing power. No advancements in computing power or crypto-analysis will be able to break the QKD protocol, including quantum computers.
The most secure way to share encryption keys
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