The Caesar cypher is The most uncomplicated and earliest recognised encryption methods, the place each letter within the plaintext is shifted a hard and fast range of places down or up the alphabet.
a lot of in America https://macktechbiz.com/blogs/news/unleashing-the-power-of-micro-appliance-pc-firewalls-a-revolution-in-open-source-firewall-solutions-with-zenarmor-and-opnsense-support