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Symmetric vs Asymmetric Encryption: Key Differences Learn how symmetric and asymmetric encryption work, compare their strengths, and see which one fits your security needs in 2025. Encryption explained Encryption is one of the most important concepts in the world of cybersecurity. It lays the foundation for secure communication between two systems, and ensures that the content cannot be read by unwanted parties. Think of encryption as locking your diary with a key before leaving it on a park bench. Anyone can see the diary, but only those with the correct key can read what’s inside. Encryption protects messages, files, and even entire hard drives from prying eyes - whether those eyes belong to cyber-criminals, nosy co-workers, or rogue Wi-Fi hotspots. ...

How to use SSH to connect to a machine behind firewall SSH is usually used to connect to servers with open ports, accessible from anywhere in the world. But what about machines behind firewalls, or behind a NAT? This guide will show you an SSH trick that you can use to achieve this reverse connection, where you can connect from a server to a client behind a firewall. Note: You do still need a server/machine accessible through ssh over the internet. ...