Sökning: "Cryptography"
Visar resultat 6 - 10 av 45 avhandlingar innehållade ordet Cryptography.
6. Some Words on Cryptanalysis of Stream Ciphers
Sammanfattning : In the world of cryptography, stream ciphers are known as primitives used to ensure privacy over a communication channel. One common way to build a stream cipher is to use a keystream generator to produce a pseudo-random sequence of symbols. LÄS MER
7. Cryptographic Tools for Privacy Preservation and Verifiable Randomness
Sammanfattning : Our society revolves around communication. The Internet is the biggest, cheapest and fastest digital communication channel used nowadays. Due to the continuous increase of daily communication among people worldwide, more and more data might be stolen, misused or tampered. LÄS MER
8. On the Design and Analysis of Stream Ciphers
Sammanfattning : This thesis presents new cryptanalysis results for several different stream cipher constructions. In addition, it also presents two new stream ciphers, both based on the same design principle. The first attack is a general attack targeting a nonlinear combiner. LÄS MER
9. On Some Symmetric Lightweight Cryptographic Designs
Sammanfattning : This dissertation presents cryptanalysis of several symmetric lightweight primitives, both stream ciphers and block ciphers. Further, some aspects of authentication in combination with a keystream generator is investigated, and a new member of the Grain family of stream ciphers, Grain-128a, with built-in support for authentication is presented. LÄS MER
10. Some Notes on Code-Based Cryptography
Sammanfattning : This thesis presents new cryptanalytic results in several areas of coding-based cryptography. In addition, we also investigate the possibility of using convolutional codes in code-based public-key cryptography. The first algorithm that we present is an information-set decoding algorithm, aiming towards the problem of decoding random linear codes. LÄS MER