- "In cryptography, encryption is the process of encoding information."
A set of rules or instructions that are used to decrypt or decode an encrypted message in a specific way.
Cryptography Principles: Understanding the basic concepts and principles of cryptography is the foundation for learning about decryption algorithms.
Symmetric-Key Cryptography: A type of encryption where a single key is used for both encryption and decryption. This topic covers the principles and implementation of symmetric-key cryptography.
Asymmetric-Key Cryptography: A type of encryption where two different keys are used for encryption and decryption. This topic covers the principles and implementation of asymmetric-key cryptography.
Block Ciphers: A type of encryption that works on fixed-size blocks of plaintext. This topic covers the principles and implementation of block ciphers.
Stream Ciphers: A type of encryption that works on individual bits or bytes of plaintext. This topic covers the principles and implementation of stream ciphers.
Hash Functions: A type of one-way encryption that converts data of any size to a fixed-size output. This topic covers the principles and implementation of hash functions.
Public-Key Infrastructure (PKI): A set of protocols and services that enable secure communication using public-key cryptography. This topic covers the principles and implementation of PKI.
Cryptanalysis: The study of cryptographic systems with the goal of breaking them. This topic covers the various techniques and methods used in cryptanalysis.
Quantum Cryptography: A type of cryptography that is based on the principles of quantum mechanics. This topic covers the principles and implementation of quantum cryptography.
Side-Channel Attacks: A type of attack that exploits weaknesses in a cryptographic system that are not related to the cryptographic algorithms themselves. This topic covers the various types of side-channel attacks and how they can be mitigated.
Symmetric Key Encryption: This encryption algorithm involves a shared pre-agreed key that is used for both encryption and decryption. It is fast, efficient, and easy to understand, but sharing the key securely can be challenging.
Asymmetric Key Encryption: In this algorithm, two different keys are used for encryption and decryption. Public key encryption is an example of asymmetric key encryption, which involves sharing a public key with anyone who wants to communicate with you while keeping the private key protected.
Advanced Encryption Standard (AES): This is a widely used symmetric key encryption algorithm that uses 128-bit, 192-bit or 256-bit key sizes. It is the basis for data encryption standards used in secure communication such as SSL, VPNs, and wireless networks.
RSA Algorithm: This is a commonly used asymmetric key encryption algorithm that uses prime numbers as the basis for key generation. RSA is highly secure due to the complexity of large prime numbers but can be relatively slow for encryption and decryption.
Data Encryption Standard (DES): This is a symmetric key algorithm that uses a 56-bit key size. However, its small key size makes it vulnerable to brute force attacks, which is why it is now considered less secure and less commonly used.
Blowfish: This is a symmetric key encryption algorithm that uses variable length key sizes up to 448 bits. Blowfish is highly secure, efficient, and reliable, and it is often used by financial institutions for secure communication.
ChaCha20: This is a widely used symmetric key algorithm that uses a 256-bit key size. It is a fast and highly secure algorithm developed by Google for use in secure communications such as network traffic encryption.
- "This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext."
- "Ideally, 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."
- "Early encryption techniques were often used in military messaging."
- "Modern encryption schemes use the concepts of public-key and symmetric-key."
- "Modern encryption techniques ensure security because modern computers are inefficient at cracking the encryption."