Sökning: "Lattice-based"
Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet Lattice-based.
1. Network and lattice based approaches to the representation of knowledge
Sammanfattning : This report is a study of the formal means for specifying properties of network structures as provided by the theory of information management systems. Along with axioms for some simple network structures we show examples of the manner of which intuitive observations on the structures are formulated and proved... LÄS MER
2. Multidimensional Constellation Shaping for Coherent Optical Communication Systems
Sammanfattning : To overcome the increasing demands for Internet traffic, exploiting the available degrees of freedom in optical communication systems is necessary. In this thesis, we study how constellation shaping can be achieved in various dimensions and how various shaping schemes affect the whole performance in real systems. LÄS MER
3. Some Notes on Post-Quantum Cryptanalysis
Sammanfattning : Cryptography as it is used today relies on a foundational level on the assumptionthat either the Integer Factoring Problem (IFP) or the DiscreteLogarithm Problem (DLP) is computationally intractable. In the 1990s PeterShor developed a quantum algorithm that solves both problems in polynomialtime. LÄS MER
4. Multidimensional Modulation Formats for Coherent Single- and Multi-Core Fiber-Optical Communication Systems
Sammanfattning : This thesis covers multidimensional modulation formats for coherent optical communication systems including spatial division multiplexed systems using multicore fibers. The single-mode optical signal has four dimensions which are spanned by the two orthogonal polarizations and the in-phase and quadrature components. LÄS MER
5. Decryption Failure Attacks on Post-Quantum Cryptography
Sammanfattning : This dissertation discusses mainly new cryptanalytical results related to issues of securely implementing the next generation of asymmetric cryptography, or Public-Key Cryptography (PKC).PKC, as it has been deployed until today, depends heavily on the integer factorization and the discrete logarithm problems. LÄS MER