Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 209 for “"Hash"”.
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A distributed Hash table
DHash is a new system that harnesses the storage and network resources of computers distributed across the Internet by providing a wide-area storage service, DHash. DHash frees applications from re-implementing mechanisms common to any system that stores data on a collection of machines: it …
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Design and analysis of hash functions
… fixed small size ‘message digest’ is known as a hash function. For the last two decades, many types of hash functions have been defined but, the most widely used in many of the cryptographic applications currently are hash functions based on block ciphers and the dedicated hash functions. Almost …
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Generic attacks on iterated hash functions
We survery the existing generic attacks on hash functions based on the MerkleÂDamgard construction: that is, attacks in which the compression function is treated as a black box.
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Algorithms for Hash Coding and Document Classification
Made available in DSpace on 2014-12-10T20:13:34Z (GMT). No. of bitstreams: 1 7309906.pdf: 2761825 bytes, checksum: f4f94c482f7e19eb6fad9964ab40f0be (MD5) Previous issue date: 1972
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Hash code learning for large scale similarity search
… thesis we explore methods which learn compact hash coding schemes to encode image databases such that relevant images can be quickly retrieved when a query image is presented. We here present three contributions. Firstly, we improve upon the bit allocation strategy of Signal-to-Noise Ratio …
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MicroCuckoo Hash Engine for High-Speed IP Lookup
… methodology that comprises of MicroCuckoo-hash technique, to route packets. This approach alleviates the memory requirements significantly, by completely eliminating the need for TCAM cells. Cuckoo hash is used to achieve very high speed, hardware accelerated table lookups and also are …
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Product Authentication Using Hash Chains and Printed QR Codes
… handled differently. An algorithm that utilizes hash chains to secure such simple tags while still keeping cost low is discussed. The security characteristics of this scheme as well as other product authentication schemes that use RFID tags are compared. Arguments for static tags being at least …
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Storing and managing data in a distributed hash table
Distributed hash tables (DHTs) have been proposed as a generic, robust storage infrastructure for simplifying the construction of large-scale, wide-area applications. For example, UsenetDHT is a new design for Usenet News developed in this thesis that uses a DHT to cooperatively deliver Usenet …
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CPHASH : a cache-partitioned hash table with LRU eviction
In this thesis we introduce CPHASH - a scalable fixed size hash table that supports eviction using an LRU list, and CPSERVER - a scalable in memory key/value cache server that uses CPHASH to implement its hash table. CPHASH uses computation migration to avoid transferring data between cores. …
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A fast concurrent and resizable Robin Hood hash table
Concurrent hash tables are among the most important primitives in concurrent programming and have been extensively studied in the literature. Robin Hood hashing is a variant of linear probing that moves around keys to reduce probe distances. It has been used to develop state of the art serial hash …
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Isolierung und Charakterisierung des testisspezifisch exprimierten Gens HASH der Maus
… möglichst detaillierte Charakterisierung des HASH-Gens der Maus. Das HASH-Gen besteht aus 2678 Bp und beinhaltet einen offenen Leserahmen von 1290 Bp. Northern-Bot-Analysen zeigten, daß das HASH-Gen im Testis exprimiert ist, und zwar mit drei Transkripten (2.6 Kb, 1.8 Kb und 1.2 Kb). Es konnte …
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Robust and efficient data management for a distributed hash table
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Security proofs for the MD6 hash function mode of operation
… cryptanalytic attacks on several commonly-used hash functions, such as MD4, MD5, SHA-0, and SHA1 [13, 38]. These culminated with the celebrated work of Wang, Yin, and Yu from 2005, which demonstrated relatively efficient methods for finding collisions in the SHA-1 hash function [37]. Although …
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Scaled: Scalable Federated Learning via Distributed Hash Table Based Overlays
… Scalable Federated Learning via Distributed Hash Table Based Overlays for network (Scaled) to conduct multiple concurrently running FL-based applications over edge networks. Specifically, Scaled adopts a fully decentral- ized multiple-master and multiple-slave architecture by exploiting …
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Design and applications of a secure and decentralized Distributed Hash Table
Distributed Hash Tables (DHTs) are a powerful building block for highly scalable decentralized systems. They route requests over a structured overlay network to the node responsible for a given key. DHTs are subject to the well-known Sybil attack, in which an adversary creates many false identities …
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High Level Synthesis and Evaluation of the Secure Hash Standard for FPGAs
Secure hash algorithms (SHAs) are important components of cryptographic applications. SHA performance on central processing units (CPUs) is slow, therefore, acceleration must be done using hardware such as Field Programmable Gate Arrays (FPGAs). Considerable work has been done in academia using …
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G-hash: Towards Fast Kernel-based Similarity Search in Large Graph Databases
… graph data management. In our method we use a hash table to support efficient storage and fast search of the extracted local features from graph data. Using the hash table, we have developed a graph kernel function to capture the intrinsic similarity of graphs and for fast similarity query …
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Proposta de implementação dos algoritmos de hash MD5 e SHA-1 em hardware reconfigurável
This work proposes two Application Specific System Processor (ASSP), one to the MD5 algorithm and other to the SHA-1 algorithm implemented on Field Programmable Gate Array (FPGA) Xilinx Virtex 6 xc6vlx240t-1ff1156. The throughput and the occupied area were analyzed for several implementations on …
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A Physical Hash for Preventing and Detecting Cyber-Physical Attacks in Additive Manufacturing Systems
… (AM) systems. The method makes use of a physical hash, which links digital data to the manufactured part via a disconnected side-channel measurement system. The disconnection ensures that if the network and/or AM system become compromised, the manufacturer can still rely on the measurement system …
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