The security communication protocols are responsible for secure access to a website. In this first article, we will talk about the HTTPS protocol.
It is an acronym for Hyper Text Transfer Protocol Secure and is a derivation of the HTTP protocol over an SSL layer. This layer allows data to be transmitted over an encrypted connection and verification that the client is who he says through digital certificates. The TCP port used for the HTTPS protocol is port 443.
This protocol is used when you want to prevent the information being transmitted to the server is intercepted.
So when a site is HTTPS, you are sure that you are only seeing the information transmitted and that there is no sniffer capturing your data, except for viruses in the used computer.
HTTPS sites, there is always a padlock that appears usually in the right bottom or side of the browser’s address bar.
SSL is the standard security protocol for encoding secret information. SSL creates a shared digital key, allowing only the sender and receiver transmission decode or encode information. For everyone else, the SSL transmission is indecipherable.
SSL encryption can be broken only if the encrypted message is intercepted, recorded, or if you use a computer to try to combine all possible combinations until the key is decrypted. These keys may have 40-1024 bits. That’s over a billion possible combinations!
We meet in the next article!
NUNES, Esdras; ASSIS, Calebe. TCC: Biometria na Web – Porto Alegre/RS [Brazil] – 2009, FATEC SENAI. Pages 12-16.