Is the process of encoding information. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Only authorized parties can decipher a ciphertext back to plaintext and access the original information.
Encryption does not itself prevent interference but denies the intelligible content to a would-be interceptor. For technical reasons, an
encryption scheme usually uses a pseudo-random
encryption key generated by an algorithm. It is possible to decrypt the message without possessing the key, but, for a well-designed
encryption scheme, considerable computational resources and skills are required. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients but not to unauthorized users. Historically, various forms of
encryption have been used to aid in cryptography. Early
encryption techniques were often utilized in military messaging. Since then, new techniques have emerged and become commonplace in all areas of modern computing. Modern
encryption schemes utilize the concepts of public-key and symmetric-key. Modern
encryption techniques ensure security because modern computers are inefficient at cracking the
encryption.
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