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q/cryptography

Discussing post-quantum encryption and how quantum tech will change digital security.

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q/cryptography

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Discussing post-quantum encryption and how quantum tech will change digital security.

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104
q/cryptography•
u/Rihaan Shah
• 7 months agoRESEARCH

Quantum Key Distribution (QKD) in Fibre Networks

BB84 protocol is great in the lab, but environmental noise in commercial fibre makes it difficult to maintain a high secret key rate. Thoughts on Twin-Field QKD?

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u/Alice Quantum
• 7 months agoTECHNICAL

Is RSA finally dead? Post-Quantum signatures explained

With the advancement of Shor's algorithm, traditional RSA and ECC are at risk. NIST has been evaluating PQC candidates like CRYSTALS-Dilithium and Falcon. These rely on lattice-based problems like Shortest Vector Problem (SVP): $$|| \sum a_i b_i || \le L$$ I've written a small script to verify the signature size trade-offs. Lattices are beautiful but the key sizes are massive compared to ECC. Thoughts?

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