The security level of a cryptographic algorithm indicates how resistant it is to computational attacks. This article outlines how security levels are defined, how different evaluation approaches are used, and how security levels influence the selection of cryptographic algorithms.

The emergence of quantum computers introduces new risks for modern cryptography. This article explains how quantum adversaries threaten today’s encryption through attacks such as Harvest-now, Decrypt-later and quantum algorithms like Shor’s and Grover’s, and why organisations must act early to protect long-term sensitive data.

Quantum computers fundamentally challenge today's cryptography. Many established cryptographic methods will lose their security in the long term. In order to continue protecting data in the future, it is crucial to understand the differences between classical cryptography, post-quantum cryptography (PQC), and quantum cryptography (QC).