atria, we noted that a 3 h intermittent burst pacing protocol mimicking ectopic foci in pulmonary

An optimal eavesdropping strategy for BB84 protocol in quantum cryptography is proposed. This scheme is based on the ‘indirect copying’. Under this scheme, eavesdropper can exactly obtain the exchanged information between the legitimate users without being detected.

We prove that BB84 protocol with random privacy amplification is secure with a higher key rate than Mayers’ estimate with the same error rate. Consequently, the tolerable error rate of this protocol is increased from 7.5 % to 11 %. We also extend this method to the case of estimating error rates

Abstract. We study the advantages to be gained in quantum key distribution (QKD) protocols by combining the techniques of local randomization, or noisy preprocessing, and structured (nonrandom) block codes. Extending the results of [Smith, Renes, and Smolin, quant-ph/0607018] pertaining to BB84, we

Abstract. In 1984, C.H. Bennet and G. Brassard proposed a new protocol aimed to solve the problem of symmetric cryptographic key exchange. This protocol was called BB84 after the name of its authors. While a traditional method would rely on public key cryptography (like RSA), the BB84 protocol

The famous BB84 protocol relies on the conjugate bases Z = {|0〉, |1〉} and and |− 〉 = |0〉−|1〉 √. Fuchs et. al. (Phy. Rev. A, 2 1997) presented an optimal eavesdropping strategy on the four-state BB84 protocol.} Later Bruß (Phys. Rev. Lett., 1998) described the use of the basis X = {|+〉,|−〉}, where

Quantum Key Distribution (QKD) networks are the best application of quantum cryptography in which we use the principles of quantum mechanics with classical cryptographic techniques to provide the unconditional security. This paper discusses the various attack strategies over BB84 quantum key

this model we show how game theory can be used to find the strategies for Alice, Bob and Eve. Keywords- BB84 protocol, static game theory, mixed strategy Nash equilibrium. I.

. This paper will discuss the implementation of BB84 protocol in UDP 802.11i Wireless Local Area Network (WLAN). WLAN as a wireless links are much noisier and less reliable in general than wired links. This type of noise will generate different numbers of key length and also different level of error rate

Practical realizations of quantum key distribution employ dim coherent states as an approximation to single photon states. The advantage is that dim coherent states are convenient to use. The draw-back is that the security proofs for quantum key distribution have to be adapted. Difficulties arising from the use of signal states containing multi-photon contributions in combination with lossy channels have been pointed out earlier by Huttner et al.. In this paper I describe a first numerical bound allowing quantum key distribution using dim coherent signal states in the presence of noise.