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Privacy amplification

Privacy Amplification is a countermeasure employed in Quantum Key Distribution (QKD) systems to transform a potentially partially compromised key into a highly secure one, using hash functions to remove any patterns exploitable by eavesdroppers.

References

[1] Thomas Vidick, Lecture Notes - Quantum Cryptography Week 4: From imperfect information to (near) perfect security, http://users.cms.caltech.edu/~vidick/teaching/120_qcrypto/LN_Week4.pdf

Literature

[Bennet1992]	C.H. Bennett, F. Bessette, G. Brassard, L. Salvail, J. Smolin. "Experimental quantum cryptography" In: J. Cryptology 5, 3–28. (1992) 10.1007/BF00191318.

QID: CM-0001

Tier: T0

Type: Quantum

Tactic: Harden

Created: 2024-03-02

Updated: 2024-05-24

Technique → Countermeasures

List of techniques where this countermeasure can be applied.

Items: 3

Description	Technique
Application of privacy amplification in the case of partial key leakage.	Quantum Trojan-Horse Attack (THA)
Privacy amplification can secure the key distribution process even in the presence of some level of eavesdropping.	Photon-Number-Splitting (PNS) Attack
Privacy amplification can secure the key distribution process even in the presence of some level of eavesdropping.	Intercept-and-Resend Attack