Citation
Abstract
In this report, we examine vulnerabilities in quantum key distribution (QKD) schemes that may arise in practice. In particular, we assume a probability bias in the distribution of states and bases used in a BB84-like protocol, and show how this can allow an eavesdropper to estimate the states used in the protocol and to correspondingly design a positive-operator valued measure (POVM) to estimate secret key bits for use in an intercept-relay attack. We quantify the error in the state estimation and the probability of correct key-bit detection with respect to the probability bias.
Keywords
channel capacity
quantum information
quantum capacity
Details
- Volume
- 42-220
- Published
- February 15, 2020
- Pages
- 1–19
- File Size
- 687 KB