Why is QKD considered limited or even useless for encryption key security now and potentially in the foreseeable future?

QKD, while theoretically secure, faces practical limitations such as distance constraints, implementation challenges, and high costs, which currently restrict its widespread adoption for encryption key security. Additionally, the requirement for trusted nodes and vulnerability to side-channel attacks raise concerns about its efficacy in providing absolute security against potential quantum threats.

What are encryption keys?

They are used to encrypt and decrypt data securely, and need to be protected just as much as the data they are intended to protect.

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Why do I need Post Quantum Cryptography now?

Q: Why do I need Post Quantum Cryptography now?

Data is already at risk. In many environments, it will take up to a decade to migrate to post quantum cryptography. At an absolute minimum, data must be secured with PQC prior to a quantum computer being able to decrypt it. Any data using today’s encryption that is stolen prior to the migration could be decrypted once the quantum computer is available.

The transition to Post Quantum Cryptography is imperative due to the looming threat of quantum computing. Our existing encryption standards could become obsolete once quantum computers become operational. The shift to PQC is not instantaneous and may span across several years, making it prudent to commence this transition sooner. By adopting PQC now, we are fortifying our data against future quantum threats, ensuring that sensitive information remains inaccessible even when intercepted by adversaries equipped with quantum decryption capabilities.

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