Learn the principles and techniques of cryptography, from encryption and decryption to modern cryptographic algorithms and attacks.
Start LearningCryptography is the practice of securing information through mathematical techniques like encryption, hashing, and digital signatures to ensure confidentiality, integrity, and authenticity of data.
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cryptography --decrypt --algorithm=aes --key=your_secret_key
Symmetric encryption uses a single key for both encryption and decryption, ensuring confidentiality but requiring secure key management.
Asymmetric encryption uses two keys: a public key for encryption and a private key for decryption, offering secure communication without needing to share the key.
Hash functions are algorithms that convert input data into a fixed-size string, commonly used in data integrity verification and password storage.
Digital signatures use asymmetric encryption to verify the authenticity and integrity of messages or documents, often used in secure communication and authentication.
Cryptanalysis involves analyzing cryptographic systems to break them, either by finding vulnerabilities or by attempting to decrypt information without the key.
OpenSSL is a toolkit for implementing the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, along with tools for working with encryption algorithms.
Hashcat is a powerful password recovery tool that uses various algorithms to perform cryptanalysis and recover encrypted passwords.
John the Ripper is a fast password cracker that supports many different hash algorithms and is commonly used in cryptographic attacks.
Brute force attacks involve systematically trying every possible key or combination until the correct one is found, typically used against weak encryption schemes.
Ciphertext analysis involves studying encrypted data to extract meaningful information, often used in cryptographic attacks to uncover weaknesses in algorithms.
MITM attacks intercept communication between two parties, allowing the attacker to manipulate the communication or steal sensitive data.
Side-channel attacks exploit physical characteristics of a cryptographic device, such as timing or power consumption, to extract secret information like keys.
Quantum cryptography leverages the principles of quantum mechanics to create secure communication channels that are theoretically immune to eavesdropping.