What Is an Authentication Key?
An authentication key is a series of unique characters that are generated based on some unique information provided. This can include a time-stamp, a key purchased with a unique product like a video game, or any other identifying factor.
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Software Authentication Keys
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Software will often be packaged with a unique authentication key. When you start to install the software you will be prompted for the key in order to install the software and will later be requested to register the key to your name for security.
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Public-key Cryptography
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Public-key cryptography (PKC) uses uniquely generated keys to verify the identity of someone when certain types of information are requested.
PKC and Encryption
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One of the most common uses of PKC is to verify the identity of a party attempting to decrypt certain information. The party must posses the unique authentication key in order to decrypt the information.
PKC and Secure Transactions
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Many secured connections, for example, connections used to purchase things online, also require the purchaser to provide the proper authentication key in order to process the request.
Authentication Keys as Simple Passwords
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Perhaps the most basic use of authentication keys is as generic passwords. Whether referring to the combination of a lock or the correct string of digital characters to access a computer, the process is the same--if the input is correct, access is granted.
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Resources
- Photo Credit "RustyPadlock" is Copyrighted by Flickr user: david.nikonvscanon (David Blaikie) under the Creative Commons Attribution license.
