Today I'm going to talk about cryptography.
Confidentiality is privacy.The data is only visible for the people who have rights.
We can get confidentiality with "cryptography", that consists is change your information so no one can understand it, except you and the ones who have permissions. In other words, encrypt the data. The opposite is decrypt.
To encrypt something you need an algorithm and a key. An algorithm is the patron you use to encrypt data, and the key is the number you use to do the algorithm.
In this page: http://www.cryptoclub.org/ you can encrypt and decrypt words or phrases.
And example, in the Caesar encryption, with the key 5.
- Hi, how are you doing? ⟶ MN, MTB FWJ DTZ ITNSL?
- My name is Elsa ⟶ RD SFRJ NX JQXF
And that's all!!!!
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