Excuse me, who are you?

--Originally published at Don't Trust Humans, Trust Computers

Each person in this planet has something that identifies him/her. It could be a physical characteristic, like nose shape, eye color, hair, a scar, etc., or it could be a non-physical thing like voice tone, name, the way you speak, and so on. We even have legal documents that verify who we are in a society. No matter in what part of the world we are, we are someone and we can probe that we are the person we say we are. But if the pass from the physical world into the digital one. In the digital world, we can be any one and there’s no one that is checking if we are really who we say we are, or maybe there is? The truth is it depends on how you see it. Because there are websites, like Tumblr that ask you for a user and a password, so there is really someone checking that the user and password match, but once inside Tumblr is another story. If you came to realize, there are many places in the digital environment that ask for a user and password, and that is important matter in the security aspect.

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Authentication and access control are two complementary topics that go on hand in hand. Most of the time you want this type of security in any system you are in to protect the information that is inside a system. And of course, it affects which user access the system. Authentication is the process of verifying if you are really the user you say you are. This process there are two key elements: the identifier and the authenticator. By identifier we mean the user, that tells who you are and the identifier is commonly known as the password that verifies that is truly you who is

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