Security of Quantum Key Distribution from Cryptographic Perspectives
鐘楷閔1*
1資訊所, 中央研究院, 台北市, Taiwan
* Presenter:鐘楷閔, email:kmchung@iis.sinica.edu.tw

Quantum key distribution (QKD) is arguably the most important application in quantum cryptography that enables two distant parties to agree on a uniform secret key using insecure public channels with information-theoretic security --- a task that is impossible classically. Today, QKD has become a mature technology and started to be deployed to secure military and inter-bank communications. Due to its critical applications, it is imperative to fully understand its security.

In this talk, I will present our ongoing effort to survey the security of QKD from cryptographic perspectives, where importantly, the security is determined by the assumptions and the security definitions used in the security proof. To illustrate the point, I will compare the security achieved and the assumption required by several important QKD protocols such as the original BB84 protocol, Decoy-state QKD, Measurement-device-independent (MDI) QKD, and fully device-independent QKD protocols.


Keywords: Quantum Key Distribution, Quantum Cryptography, Secure communication, Information-theoretic Security, Composable security