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Optimal Feedback Communication Via Posterior Matching
Optimal Feedback Communication Via Posterior Matching

... Gaussian noise (AWGN) channel with an average power constraint. The Schalkwijk-Kailath scheme is “parameter estimation” in spirit, and its simplest realization is described as follows: Fixing a rate and a block length , the unit interval is partitioned into equal length subintervals, and a (determin ...
An Efficient Scheme for Proving a Shuffle
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... A mix-net[Ch81] scheme is useful for applications which require anonymity, such as voting. The core technique in a mix-net scheme is to execute multiple rounds of shuffling and decryption by multiple, independent mixers, so that the output decryption can not be linked to any of the input encryptions ...
High order schemes based on operator splitting and - HAL
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... for stiff problems for which robust and stable methods that properly handle and damp out fast transients inherent to the different processes must be used. In most applications, first and second order splitting schemes are implemented, for which a general mathematical background is available (see, e. ...
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... Some ideas of the Dual Elliptic Curve generator are present in the earlier work by Naor and Reingold [21]. Let p be a prime and let g be a generator of a subgroup of Z∗p of prime order q. Let a ∈ Zq be a fixed number. Naor and Reingold [21] propose a simple function G that on input b ∈ Zq outputs (g ...
The Cut-and-Choose Game and its Application to Cryptographic
The Cut-and-Choose Game and its Application to Cryptographic

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26 Optimal Bounds for Johnson-Lindenstrauss
26 Optimal Bounds for Johnson-Lindenstrauss

... now the maximum is taken only over product distributions μ on L (if no such distribu→, tion exists then Rδ (Q) = 0). Here, by product distribution, we mean that Alice and Bob’s inputs are chosen independently. We note that the public-coin one-way communication complexity, that is, the oneway commun ...
Statistical Models for Steganography - uni
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... For example, in an image with uniform distribution of gray-level intensity, i.e. Px = 1/256, then the number of bits needed to code each gray level is 8 bits. The entropy of this image is 8. ...
CIS 5357 - FSU Computer Science
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... • The game – Adversary is given a public key and can generate any number of ciphertexts (polynomial time bound and probabilistically) – Adversary generates two equal – length messages m0 and m1 and transmits them to a challenge oracle along with the public key – The challenge oracle selects one of t ...
Internet Control Message Protocol
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... As you have seen today and over the last two days, many problems can occur in routing a message from sender to receiver. The TTL timer might expire; fragmented datagrams might not arrive with all segments intact; a gateway might misroute a datagram, and so on. Letting the sending device know of a pr ...
PK b
PK b

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Public-Key Cryptosystems Based on Hard Problems
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Cryptographic hashing - comp
Cryptographic hashing - comp

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Verifiable Shuffling
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How to Encrypt with the LPN Problem
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MT311-14
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Issue 43 Key RSC Discussion
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On Designatedly Verified (Non-interactive) Watermarking Schemes
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... Digital watermarking [2] is the process by which an image is coded with an owner’s watermark and this can be done using one of two general approaches. One approach is to transform the host image into its frequency domain representation and embed the watermark data therein. In the other method, the w ...
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ppt
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STAT 225 – Fall 2014 EXAM 2  NAME _____________________________ Patrick (7:30 am)
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... 10. Alice and Bob play a game. Each time the game is played, Alice flips a fair coin twice, while Bob draws two balls (without replacement) from an urn containing 4 black balls and 6 white balls. Alice wins the game if the number of heads she gets is greater than the number of black balls Bob gets. ...
Cryptanalysis of Shieh-Lin-Yang
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... The message m is first signed by an initiator U1, and then is sent separately to all signer. Finally,U1 is responsible for combining these individual signature into a multisignature. ...
A Secure Anti-Collusion Data Sharing Scheme for
A Secure Anti-Collusion Data Sharing Scheme for

... encryption, proxy re-encryption and lazy re-encryption to achieve finegrained data access control without disclosing data contents. DISADVANTAGES OF EXISTING SYSTEM:  The file-block keys need to be updated and distributed for a user revocation; therefore, the system had a heavy key distribution ove ...
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Commitment scheme

In cryptography, a commitment scheme allows one to commit to a chosen value (or chosen statement) while keeping it hidden to others, with the ability to reveal the committed value later. Commitment schemes are designed so that a party cannot change the value or statement after they have committed to it: that is, commitment schemes are binding. Commitment schemes have important applications in a number of cryptographic protocols including secure coin flipping, zero-knowledge proofs, and secure computation.A way to visualize a commitment scheme is to think of a sender as putting a message in a locked box, and giving the box to a receiver. The message in the box is hidden from the receiver, who cannot open the lock themselves. Since the receiver has the box, the message inside cannot be changed—merely revealed if the sender chooses to give them the key at some later time.Interactions in a commitment scheme take place in two phases: the commit phase during which a value is chosen and specified the reveal phase during which the value is revealed and checkedIn simple protocols, the commit phase consists of a single message from the sender to the receiver. This message is called the commitment. It is essential that the specific value chosen cannot be known by the receiver at that time (this is called the hiding property). A simple reveal phase would consist of a single message, the opening, from the sender to the receiver, followed by a check performed by the receiver. The value chosen during the commit phase must be the only one that the sender can compute and that validates during the reveal phase (this is called the binding property).The concept of commitment schemes was first formalized by Gilles Brassard, David Chaum, and Claude Crepeau in 1988, but the concept was used without being treated formally prior to that. The notion of commitments appeared earliest in works by Manuel Blum, Shimon Even, and Shamir et al. The terminology seems to have been originated by Blum, although commitment schemes can be interchangeably called bit commitment schemes—sometimes reserved for the special case where the committed value is a binary bit.
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