How does data encryption?

Unfortunately, in a small post, we will not be able to answer this big question of the title. But understand one of the most important algorithms used in cryptography - easily.

The problem of preservation and protection of private data by listening to internet channels costs now more than ever, perhaps even more acutely than a similar problem during the Cold War. Every day you exchange information with different people communicate and get information. I am sure you least want someone else listen in on your conversations and read your posts.

Today we look at the so-called Diffie - Hellman. Imagine a simple scenario: you and your companion the ocean need to exchange secret messages. But listen to your channel, for example, your Internet service provider has access to everything that you send and receive. There are many ways to encrypt a message, but the problem is that the encryption key should be reported to your friend, and you can not physically meet, only on the internet. And if you send the key on the internet, the whole essence of it is lost: listening villains also get it.