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 ...
... 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
... 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 ...
... 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
... 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. ...
... 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. ...
Efficient Pseudorandom Generators Based on the DDH Assumption
... 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 ...
... 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 ...
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 ...
... 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
... 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. ...
... 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
... • 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 ...
... • 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
... 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 ...
... 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
... (H1, H2-queries 2/2) B adds to the H1-list and responds
to A by setting H1(Wi)=hi.
Note that hi is uniform in G1 and is independent
of A’s current view as required.
Similarly, A queries to H2. B responds to H2(t) by
picking a new random V {0,1}log p for each new t and
setting H2(t) ...
... (H1, H2-queries 2/2) B adds
Public-Key Cryptosystems Based on Hard Problems
... two years. In january of 2015, the prime minister of the United Kingdom proposed to ban the end-to-end encryption in messages. This law was suggested against terrorist, but it raised dust. Just name only a few up to date happenings. Cryptography is one of the two main branches of cryptology. It is t ...
... two years. In january of 2015, the prime minister of the United Kingdom proposed to ban the end-to-end encryption in messages. This law was suggested against terrorist, but it raised dust. Just name only a few up to date happenings. Cryptography is one of the two main branches of cryptology. It is t ...
Cryptographic hashing - comp
... Alice (or Bob) computes x = hK(m) and sends (m, x) to Bob (or Alice). At Bob’s (or Alice) side, he computes hK(m). ...
... Alice (or Bob) computes x = hK(m) and sends (m, x) to Bob (or Alice). At Bob’s (or Alice) side, he computes hK(m). ...
Verifiable Shuffling
... We note the following collection of well know results, since they will be heavily used in the remainder of the paper. (See [21] and [33].) Lemma 1 Let f (x) ∈ Zq [x], be a polynomial of degree d. Then there are at most d values z1 , . . . , zd ∈ Zq such that f (zi ) = 0. Corollary 1 Let f (x) , g(x) ...
... We note the following collection of well know results, since they will be heavily used in the remainder of the paper. (See [21] and [33].) Lemma 1 Let f (x) ∈ Zq [x], be a polynomial of degree d. Then there are at most d values z1 , . . . , zd ∈ Zq such that f (zi ) = 0. Corollary 1 Let f (x) , g(x) ...
How to Encrypt with the LPN Problem
... where a sender and a receiver share a secret key. Up to now, most of the work in this field has concentrated on studying various operating modes to use with a secure block cipher [2]. Departing from this approach, we will construct a symmetric encryption scheme that does not appeal to any assumption ...
... where a sender and a receiver share a secret key. Up to now, most of the work in this field has concentrated on studying various operating modes to use with a secure block cipher [2]. Departing from this approach, we will construct a symmetric encryption scheme that does not appeal to any assumption ...
MT311-14
... applets were sensational because they provided a cross-platform solution for making a webpage more interesting. To safeguard users from malicious applets, applets are run in a sandbox, which imposes rather stringent restrictions on what the applets can do. ...
... applets were sensational because they provided a cross-platform solution for making a webpage more interesting. To safeguard users from malicious applets, applets are run in a sandbox, which imposes rather stringent restrictions on what the applets can do. ...
Security Analysis of a Single Sign
... user’s token against a malicious service provider, the work also implicitly agrees that there is the potential for attacks from malicious service providers against SSO schemes. Moreover, if all service providers are assumed to be trusted, to identify him/her user can simply encrypt his/her credentia ...
... user’s token against a malicious service provider, the work also implicitly agrees that there is the potential for attacks from malicious service providers against SSO schemes. Moreover, if all service providers are assumed to be trusted, to identify him/her user can simply encrypt his/her credentia ...
Lecture 10
... Public-key methods are mostly use for key exchange or key agreement protocols p and q should be at least 155 decimal digits each ...
... Public-key methods are mostly use for key exchange or key agreement protocols p and q should be at least 155 decimal digits each ...
Lecture on Security
... Some sort of overhaul is required – So what can we do to avoid shared secret? ...
... Some sort of overhaul is required – So what can we do to avoid shared secret? ...
Issue 43 Key RSC Discussion
... KeyRSC, the AC currently has no way to know precisely what the correct value is at the point at which message 3 is constructed. To work around this, LWAPP designers chose to have the AC simply set this value to 0. This decision does not affect the WTP, who maintains this counter; it only affects the ...
... KeyRSC, the AC currently has no way to know precisely what the correct value is at the point at which message 3 is constructed. To work around this, LWAPP designers chose to have the AC simply set this value to 0. This decision does not affect the WTP, who maintains this counter; it only affects the ...
On Designatedly Verified (Non-interactive) Watermarking Schemes
... 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 ...
... 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 ...
The Mathematics Behind the Birthday Attack
... are given that these random variables are independent of one another and distributed identically, ...
... are given that these random variables are independent of one another and distributed identically, ...
ppt
... • There exists a polynomial p(¢), for every probabilistic polynomial-time algorithm A, and all sufficiently large n’s Prob[A[f(x)] f-1(f(x)) ] ≤ 1-1/p(n) Where x is chosen uniformly in {0,1}n and the probability is also over the internal coin flips of A ...
... • There exists a polynomial p(¢), for every probabilistic polynomial-time algorithm A, and all sufficiently large n’s Prob[A[f(x)] f-1(f(x)) ] ≤ 1-1/p(n) Where x is chosen uniformly in {0,1}n and the probability is also over the internal coin flips of A ...
STAT 225 – Fall 2014 EXAM 2 NAME _____________________________ Patrick (7:30 am)
... 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. ...
... 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
... 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. ...
... 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
... 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 ...
... 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 ...