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One of the standout contributions of PQC 2020 was the emphasis on diversity in algorithm design. The conference showcased several candidates for standardization that leverage different mathematical problems. These include lattice-based cryptography, code-based cryptography, multivariate quadratic equations, and hash-based signatures. Each of these approaches offers unique advantages and weaknesses, which are crucial for establishing a secure post-quantum cryptographic landscape.
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Cationic polymers are positively charged macromolecules that can interact with negatively charged particles, including contaminants, organic matter, and colloids present in water. This charge-based interaction is fundamental to their effectiveness in water treatment processes. The positive charge of cationic polymers allows them to bind with negatively charged surfaces, facilitating the aggregation and removal of suspended solids and organic impurities.