Simple Proof of Security of the BB84 Quantum Key Distribution Protocol 论文

详细信息

发表期刊/会议

Physical Review Letters

发表日期

2000-07-10

发表年份

2000

摘要

We prove that the 1984 protocol of Bennett and Brassard (BB84) for quantum key distribution is secure. We first give a key distribution protocol based on entanglement purification, which can be proven secure using methods from Lo and Chau's proof of security for a similar protocol. We then show that the security of this protocol implies the security of BB84. The entanglement purification based protocol uses Calderbank-Shor-Steane codes, and properties of these codes are used to remove the use of quantum computation from the Lo-Chau protocol.