Did you know? The American government maintained serious restrictions on the export of encryption in various software, such as Microsoft Office 2000, which was prohibited from using keys longer than 40 bits!
How does encryption work?
In the beginning, encryption was done on texts so simply that it could be solved with attention. A classic example in wars.
A couple exchanges passionate letters (excerpt): "I miss you so much! Today I spent the afternoon at House Lous beach looking at the sea, I saw two dolphins, and I remembered you." [The dolphins here are submarines].
Other methods were developed to exercise the mind, such as writing backward, done by Leonardo da Vinci, and the substitution of characters with others.
Example: ésT-oaL .ossap ocinú mu moc açemoc megaiv agnol amU
If we reverse it: Uma longa viagem começa com um único passo. Lao-Tsé (A long journey begins with a single step. Lao Tzu)
Another method is the substitution of individual characters with letters:
When substituted: Quarenta anos é a velhice dos jovens; cinqüenta anos é a juventude dos velhos. (Victor Hugo) (Forty years is the old age of youth; fifty years is the youth of the old. - Victor Hugo)
One can think of substituting characters with others in an inverted phrase. Human creativity knows no bounds!
But with the computer age, a book of hundreds of pages can be decrypted in milliseconds. Furthermore, today we don't just talk about encrypting texts, but also images, sounds, and program codes. Information has great value, so how do you protect it?
In very simple terms, I will decode the mysteries of encryption in the Encryption Special in the coming days. Come back often, there's something new every day!
