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How does encryption work? Explain the need for authentication.

To secure data, encryption uses mathematic functions known as cryptography algorithms, aka ciphers, some example of well known and trusted cryptography algorithms are AES, Blowfish, Twofish and Serpent, these ciphers can be subcategorized with a number indicating its strength in bits.

An encryption algorithm key length indicates its size measured in bits, the length indicating the algorithm strength in bits will always be even (bit is binary unit composed of zeros and ones), these keys are used to control the operation of a cipher.

Authentication is the process which allows a sender and receiver of information to validate each other. If the sender and receiver of information cannot properly authenticate each other, there is no trust in the activities or information provided by either party. Authentication can involve highly complex and secure methods or can be very simple. The simplest form of authentication is the transmission of a shared password between entities wishing to authenticate each other. Today’s authentication methods uses some of the below factors.


  1. Useful amount of information about encryption process is shared above. In so many applications and tools designed for securing information this technique is used. Thanks for sharing this detail.
    electronic signatures


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