Open Problems in Mathematics and Computational Science

About Open Problems.- The Past, Evolving Present, and Future of the Discrete Logarithm.- Isogenies in Theory and Praxis.- Another Look at Security Theorems for 1-Key Nested MACs.- Non-extendable Fq-Quadratic Perfect Nonlinear Maps.- Open Problems for Polynomials over Finite Fields and Applications.- Generating Good Span n Sequences Using Orthogonal Functions in Nonlinear Feedback Shift Registers.- Open Problems on the Crosscorrelation of m-Sequences.- Open Problems on With-Carry Sequence Generators.- Open Problems on Binary Bent Functions.- On Semi-bent functions and Related Plateaued Functions over the Galois field F2n.- True Random Number Generators.- How to Sign Paper Contracts? Conjectures and Evidence Related to Equitable and Efficient Collaborative Task Scheduling.- Theoretical Parallel Computing Models for GPU Computing.- Membrane Computing: Basics and Frontiers.- A Panorama of Post-quantum Cryptography.