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Paper 2009/196
Analysis of one quantum bit string commitment
Zhengjun Cao
Abstract
A. Kent proposed a quantum bit string commitment protocol in 2003. Not using the standard two conjugate states $|0\rangle$, $|1\rangle $, $|+\rangle $ and $|-\rangle $, the protocol uses $\psi_0=|0\rangle$ and $\psi_1=\sin \theta|0\rangle+\cos \theta |1\rangle $, where $\theta\neq 0$. In this paper, we show that the protocol can not guarantee security to the receiver. $(1-\frac{\sin^2 \theta}{2})n $ bits are definitely exposed to the receiver, where $n$ is the length of the committed string.
Metadata
- Available format(s)
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Unknown where it was published
- Contact author(s)
- zhencao @ ulb ac be
- History
- 2009-05-10: received
- Short URL
- https://ia.cr/2009/196
- License
-
CC BY