L17-Encryption

Encryption

The process of converting plaintext into ciphertext to prevent unauthorized access.

Plaintext

The original message before it is encrypted.

Ciphertext

The coded message which is the result of encryption.

Key

Information used in a cipher, known only to the sender and receiver, to encrypt and decrypt messages.

Symmetric Encryption

A type of encryption where the same key is used for both encrypting and decrypting the message.

Cryptography

The study of methods for protecting information by transforming it into a secure format.

Cryptanalysis

Techniques used for deciphering a message without prior knowledge of the enciphering details.

Brute-force Attack

An attack method where an attacker tries every possible key until the correct key is found.

Advanced Encryption Standard (AES)

A symmetric encryption standard established in 2001, with a block size of 128 bits and key sizes of 128, 192, or 256 bits.

Public Key Cryptography

A cryptographic system that uses pairs of keys: a public key for encryption and a private key for decryption.

Digital Signature

A mathematical scheme for verifying the authenticity and integrity of a message, using a pair of keys.

Integrity

The assurance that a message has not been altered during transmission.

Authentication

The process of proving the identity of a person or entity.

RSA Algorithm

An asymmetric cryptographic algorithm used for secure data transmission.

Confidentiality

The property that information is not made available or disclosed to unauthorized individuals.