Entropic security in Quantum Cryptography

Nov 16, 2007 - definition of entropic security and entropic indistinguishability defined by Dodis and Smith. We prove ... it is allowing relaxation of...

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this system. Categories and Subject Descriptors: E.3 [Data Encryption]: public key cryptosystems. General Terms: Security. Additional Key Words and Phrases: Quantum cryptography, quantum information theory, uncondi- tional security. 1. Introduction.

(Dated: 27 May 2004). We find that the generally accepted security criteria are flawed for a whole class of protocols for quantum cryptography. This is so because a standard assumption of the security analysis, namely that the so-called square-root m

Jul 19, 2010 - [7] D. Rosenberg, J. W. Harrington, P. R. Rice, P. A. Hiskett, C. ... [14] D. Gottesman, H.-K. Lo, Norbert Lütkenhaus, and John. Preskill, Quantum ...

Aug 1, 2017 - modular security analysis of construction schemes, but no known frameworks can handle models of computation in Minkowski space. By instantiating the systems model from the Abstract Cryptography framework [5] with causal boxes [6], we ob

Sep 25, 1996 - out of two given polarisation analysers for each signal photon. One of the ... for example in form of a secret key, before the authentication can take place. .... For the one photon space we have Ei = ρi. The Shannon information is gi

Abstract—An encryption scheme is said to be entropically secure if an adversary whose min-entropy on the message is upper bounded cannot guess any function of the message. Similarly, an encryption scheme is entropically indistinguishable if the enc

May 17, 2011 - of CQC protocol against the general intercept-resend attacks is proved by bounding the information of an eavesdropper Eve more tightly than in ...

Jun 1, 2008 - 1 Centre for Quantum Technologies and Department of Physics,. National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore ..... call that (N, ε, leakEC,εEC) are parameters of the proto- col implementation, while n

Nov 12, 1999 - detectors in Bob's hands (ηB = 1 and dB = 0) the above argument leads to a neccesary condition .... Conf. on Computers, Systems and Signal Processing,. Bangalore, India (IEEE, New York, 1984) p. 175. [2] C.H. Bennett, G.

Feb 19, 2007 - tographic applications. Thus ... 1 Introduction. Shor's quantum algorithm [23] for the integer factorization problem can break down the RSA cryptosystem. This fact may be seen as a negative aspect of the power of the ...... In Advances

Aug 11, 2009 - vantage over most systems based on public key cryptography. For the latter would become insecure if progress in algorithms for integer factorization or discrete logarithms were made, and in particular if a quantum computer were built [

quantum digital signature scheme, oblivious transfer, deterministic multiparty-party secure computations and hence coin tossing. The rest of the cryptographic tasks can be built on any one of these fundamental procedures. For generality, let's suppos

Department of Physics, Centre for Laser Science, ... by using the fundamental properties of quantum mechanics to ensure that any interception .... However, for bright beams it is possible to make simultaneous measurements of the quadratures, with the

Feb 1, 2008 - of classical computer science, such as information-secure cryptographic key distribution [1,2]. The lack of .... the other half; hence, Bob does not possess information which is unavailable to Eve, and no secret key can be distilled. Us

Jun 25, 2007 - “device-independent” security scenario, where no assumptions are made about the way the QKD devices work or on what quantum ... access Bob's computer), no security can be guaranteed. In addition to these essential .... on Alice's s

Aug 21, 2015 - loophole-free setting, security could be obtained without detailed information about the implementation .... with bandwidth 33 GHz and sample rate 80 GHz (Agi- lent, model: DSOX93304Q). Because the .... finite bandwidth of these monito

[PDF]Enhanced Security with Cryptography & Steganography - arXivhttps://arxiv.org/pdf/1009.2826Cachedby DK Sarmah - ‎2010 - ‎Related articlesIn case the data is extracted, it will be encrypted. ... ➢ Unhidden part of the encrypted message will

words, the processed variables must be distributed according to a probability law P′ of the form P′(A′,B′)P′(E), with P′(a′ = b′) = 1. To date, no necessary and sufficient criterion is known to decide whether a secret key can be extra

Apr 26, 2014 - ... Beijing, 100876, China. 2Beijing Electronic Science and Technology Institute,Beijing 100070,China. 3Department of Electrical Engineering and Computer Science, Northwestern. University, Evanston, Illinois 60208, USA.

Apr 19, 2007 - The effect of a non-ideal error correction and two-way communication in the classical post-processing ... which summarize all her knowledge about the sent sig- nals until the second phase of the protocol is ...... to keep in mind that

Sep 8, 2014 - candidate to be implemented in practice and our result further justifies it. Actually, to obtain ... idealized version of a hash function, but in practice everyone instantiate it by him/herself with a concrete .... that an existing fram

Sep 8, 2014 - the classical generic construction of hash-tree based signatures from one-way functions and and a more ..... of machines, so we restrict the game to a class B, and require that ωGext (B) ≤ εB ∈ (0, 1]. Denote the computational ass

Jun 11, 2010 - Abstract. If we combine two secure cryptographic systems, is the resulting system still secure? Answer- ing this question is highly non-trivial and has recently sparked a considerable research effort, in particular in the area of class

authentication and establishment of secret “session” keys, and then protecting all or part of a traffic flow with these .... prepositioning of secret keys at pairs of devices, to be used in hash-based authentication schemes, ...... these, particu