What Is Substitution Cipher?
Do you ever get tired of the same old, same old? Sure, encryption is great, but it can be challenging to use. Sometimes you want something fun and new to make your message stand out from the crowd and get people excited about what you're saying. That's where a substitution cipher comes in! Substitution ciphers are encryption in which characters or units of text are substituted with others to encrypt a text sequence. Substitution ciphers are now relatively obsolete, having been part of early cryptography before computers evolved. We think they're cool too! You'll be surprised at how much more fun you can have with your messages when they're encrypted with. In the old days, when computers were made of gears and bolts, and humans were still trying to figure out how to use them, people used a simple substitution cipher to encrypt information. They would take each letter in plaintext and replace it with another note. For example, A might be replaced by T or E. This is called a simple substitution cipher because it returns every letter with another. The problem with this kind of encryption is that computers can easily decode it. It's too easy for a computer to look at every possible combination of letters and determine which matches the encrypted text. We no longer use simple substitution ciphers today. They're just ineffective enough to keep sensitive information safe from prying eyes and malicious hackers. However, we learned some things from our early attempts at cryptography that continue to live on in modern encryption algorithms today. For example, some current encryption algorithms might use an extensive set of possible substitutions to make it harder for hackers to crack their code. Instead of just replacing A with T or E, they might replace A with any other letter in the alphabet!
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