Cryptography Quiz

Cryptography is the practice and study of techniques for securing communication and data from third parties or adversaries.

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Plaintext is the original, readable text or data that is input into a cryptographic algorithm.

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Ciphertext is the encrypted text or data that results from applying a cryptographic algorithm to plaintext.

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A cipher is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed to achieve a secure transformation of data.

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A key is a piece of information used in conjunction with an algorithm to transform plaintext into ciphertext and vice versa.

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Symmetric key cryptography uses the same key for both encryption and decryption of data.

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Asymmetric key cryptography uses a pair of keys—a public key for encryption and a private key for decryption.

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A hash function is a mathematical algorithm that transforms data into a fixed-size string of characters, which is typically a digest that represents the data.

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