In this article, as I promised earlier, I will touch on a technique we use on a daily basis to browse sensitive web pages and also to send and receive messages, this task is to maintain the privacy and confidentiality of information, and specifically we will talk about encryption "cryptography".
This science has been developed and integrated into the world of informatics and computing to keep the privacy and confidentiality of mobile data on the Internet, where everyone knows that there are many who can read and know all our movements and movements on the Internet, including governments, hackers and also the Internet service provider Here, we can see how dangerous this is in case the data is transmitted explicitly on the Internet, and for this reason the use of encryption technology and incorporated significantly in the digital world.
What is encryption?
Here dear dear I will use a simplified concept in order to benefit everyone from the subject, whether you are a pioneer in the field of informatics or only amateur important is to benefit.
Encryption in general is the possibility of changing the content of data, whether "message or image or video" from readable and understandable content to content difficult to see. Well, do not rush and to understand more and clearer take a text message as in the picture, in the first message seems clear and easy to read but when it is encrypted, here is difficult to read because the content changed completely, and when it reaches the second party, ie the recipient of the message became clear and easy Reading because the second party knows how to decrypt.
In what will benefit the encryption process?
Here the answer is clear , through the previous article, you will be clear that you will need the encryption process in a lot of sensitive tasks that you do not want any third party to see.
How does encryption work? Or how is encryption?
Here, my dear, in order not to put any complications on you, I will put you a very simplified metal in the form of a game in order to become clear to you the process. Okay let's take the picture down.
You notice that each letter of the foreign language corresponds to a specific number, the letter A corresponds to 1 and the letter M corresponds to 13. Here in this sequence if I told you {encrypt the letter A key 3} Here, direct encryption of the letter A will become the letter D
In order not to confuse you things I will clarify more, but you must take these terms.
Explicit text: is the original text that you want to encrypt and in the sequence is the letter A
Key: The number of digits in which the original number corresponding to the letter A is shifted, ie in Example 3 where the slots are shifted.
Encoded text: is the letter resulting from the offset and in succession is the letter D
Another example, if I told you to encrypt the letter M directly to the key 5, the answer will be R ie you added 5 to the corresponding number of the letter M to give you 18 where it is the letter R
If I understand well I write in the comments encrypt the word hello with key 7. Let's see you understand well. In these examples I encrypted. If you want to decrypt, you just have to reverse the encryption process.
Am I doing the encryption?
It is essentially if you use browsers such as "chrom opera firfox" here does not require you as an Internet user to encrypt your data, the companies that develop the browsers are supporting encryption and decryption technology in their browsers through a certificate to ensure that your connection to a particular site is secure, this certificate is known as a certificate SSL "Secure socket layer"
SSl certificate
In a nutshell, in order not to be too frequent, it is a digital certificate adopted by recognized and trusted companies, to identify its identity, whether you use the site "youtube" What is the evidence that you are using the original site or not, remains your only guide is this digital certificate where the green lock mark It is the proof that you are in the correct website of the company, and also through this digital certificate can encrypt your data and the only one that can decrypt is the company "youtube". It also uses very complex algorithms for encryption, which makes it difficult to decode and know the data content.
Where do I get a certificate? Who produces them?
Here, dear ssl certificate is the only unmovable for a certain company in order to ensure the security of data transmission and impossible to falsify. SSL certificates are awarded by internationally recognized companies with more protection experience than you think and are the only ones that build and modify these certificates to be interoperable.
Is the SSL certificate permanent?
Dear reader, the SSL certificate has a specific expiration period which the company must renew. Why? There is a strong insult that if some hackers have very strong equipment, it is natural they will try to purely decrypt the company data by decrypting the SSL certificate and in order to avoid this change, which is almost impossible, they put the expiration date of the certificate.
How is the certificate validity date determined?
From my humble experience, the validity date of the certificate depends on the strength of its encryption. If you use a small encryption chain, the probability of decryption by the hackers will be shorter, and the longer the length of the encryption chain, the more difficult it is to decrypt.
In conclusion, dear, I hope from the heart that I have served you in a way that facilitates understanding of encryption technology, and if you have any ambiguity, here the staff of the blog at your service to clarify all the mystery. If you like the topic, don't forget to share it with your colleagues.
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