Cryptography

Cryptography Cryptography is the art and science of protecting sensitive information and communications through various techniques. It encompasses a wide ra...

Cryptography

Cryptography is the art and science of protecting sensitive information and communications through various techniques. It encompasses a wide range of methods and tools used to conceal data, ensure its integrity, and prevent unauthorized access or disclosure.

Encryption

Encryption is a fundamental technique in cryptography. It involves transforming plaintext (readable data) into ciphertext (unreadable data) using an encryption algorithm. Only authorized parties possess the decryption key necessary to transform ciphertext back into the original plaintext.

Decryption

Decryption is the opposite of encryption. It involves using the same encryption key to transform ciphertext back into its original plaintext.

Symmetric and Asymmetric Encryption

There are two main types of encryption: symmetric and asymmetric. In symmetric encryption, both the sender and receiver use the same encryption key. In asymmetric encryption, two different keys are used: a public key for encrypting data and a private key for decrypting it.

Hashing

Hashing is a mathematical function that converts an input message into a fixed-length output digest. It ensures that any changes to the input message result in a different digest, preventing malicious users from modifying the message and changing the digest to gain unauthorized access to the original message.

Digital Signatures

A digital signature is a digital document that contains a hash of the message and the sender's public key. This ensures that the message was sent by the intended sender and that the signature can be verified using the sender's private key.

Cryptanalysis

Cryptanalysis is the study of breaking cryptographic systems and algorithms. It involves analyzing weaknesses in encryption schemes, searching for vulnerabilities, and developing new encryption methods to enhance security