## computationally infeasible

computationally intractable Look at other dictionaries: cryptology

## Making eclipse attacks computationally infeasible in …

Making eclipse attacks computationally infeasible in large-scale DHTs Abstract: The security aspect of Distributed Hash Tables (DHT-s), the principal model for structured P2P networks, has received considerable attention from research community, and the eclipse attack is …

## Making eclipse attacks computationally infeasible in …

In this paper we present a novel approach to address eclipse attacks — making such attacks computationally infeasible. The backbone of our approach is a scheme for generating node IDs, which requires a user to solve a computational puzzle generated by her network parameters together with time-related information, in order for him to obtain a valid ID.

Public Key Cryptography

· PDF 檔案4.Computationally infeasible to determine private key (KR b) knowing public key (KU b) 5.Computationally infeasible to recover message M, knowing KU b and ciphertext C 6.Either of the two keys can be used for encryption, with the other used for decryption: M=

## Why a Bitcoin transaction that refers its own output as an …

It’s computationally infeasible because an input MUST exist before an output. The tricky part is the terminology, input vs output. They are both outputs but in different states. Essentially everything is an output existing in the ever-changing Unspent

COMPUTATIONALLY INFEASIBLE

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## CS 465 Computer Security

· PDF 檔案1. H can be applied to a block of data of any size 2. H produces a ﬁxed-length output 3. H(x) is relatively easy to compute for any given x 4. For any given value h, it is computationally infeasible to ﬁnd x such that H(x) = h 5. For any given block x, it is computationally infeasible to ﬁnd y ≠ x

## Collapsed Variational Inference for Sum-Product Networks

Exact Bayesian posterior inference for SPNs is computationally intractable. Even approximation techniques such as standard variational inference and posterior sampling for SPNs are computationally infeasible even for networks of moderate size due to the large number of …

## The Adaptive Lasso and Its Oracle Properties

· PDF 檔案large, it is computationally infeasible to do subset selection. Second,subset selectionis extremely variable becauseof its in-herentdiscreteness(Breiman1995;FanandLi 2001).Stepwise selection is often used as a computational surrogate to subset

Overview of Reinforcement Learning Algorithms

In most cases, the MDP dynamics are either unknown, or computationally infeasible to use directly, so instead of building a mental model we learn from sampling. In all the following reinforcement learning algorithms, we need to take actions in the environment to collect rewards and estimate our objectives.

Asymmetric Key Ciphers

is considered to be computationally infeasible for large enough keys). The elliptic-curve cryptography (ECC) cryptosystem is based on the math of the on the algebraic structure of the elliptic curves over finite fields and the elliptic curve discrete

computationally infeasible problem

вычислительно неразрешимая задача

Configuring Network Data Encryption

The purpose of a secure cryptosystem is to convert plaintext data into unintelligible ciphertext based on a key, in such a way that it is very hard (computationally infeasible) to convert ciphertext back into its corresponding plaintext without knowledge of the

## Recommendation for key derivation using pseudorandom …

· PDF 檔案(One-way) It is computationally infeasible to find any input that maps to any pre-specified output, and 2. (Collision resistant) It is computationally infeasible to find any two distinct inputs that map to the same output. Approved hash functions are specified in FIPS

## Merkle-Damgård Construction Method and Alternatives: A …

· PDF 檔案computationally infeasible to find an input M such that h(M) H. (2) Second preimage resistance: it is computationally infeasible to find any second input which has the same output as any specified input.

Digital Signatures (Emergency Regulations)

It is computationally infeasible to derive the private key from knowledge of the public key. California Government Code Section 16.5 requires that a digital signature be ‘capable of verification.’ A public key-based digital signature is capable of verification if:

Chapter 8 Public Key Cryptography

· PDF 檔案Chapter 8 Public Key Cryptography 4. It is computationally infeasible for an opponent, knowing the public key KU b, to determine the private key KR b. 5. It is computationally infeasible for an opponent, knowing KU b and C to recover the plaintext message M. 6. A