Cryptography
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Summary #
Cryptography is the study of secure communications techniques that allow only the sender and intended recipient of a message to view its contents. with added benefit of being able to prove the correctness of the message and the identity of sender. Very valuable indeed.
The term is derived from the Greek word kryptos, which means hidden.
It is closely associated to [[][encryption ]], which is the act of scrambling ordinary text into what’s known as ciphertext and then back again upon arrival
Advantageous properties (how it is different than ) #
confidentiality messages are impossible to read for everyone except the intended recipients.
integrity impossible to modify content without detection.
non-repudiation authenticity of the message can be validated.
repudiate✌️ refuse to accept; reject.
Symmetric key cryptography #
A shared secret is exchanged privately and the messages are decrypted(understood) on by the bearers of the secret.
Efficient and decryption: less computation resources needed.
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Hash Function #
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is the that implements crytography in .