Key Features

• Confidentiality – Keeps data secret from unauthorized users.
• Integrity – Ensures data is not altered during transmission.
• Authentication – Verifies the identity of users or systems.
• Non-repudiation – Prevents denial of sending or receiving data.
  Covers both symmetric and asymmetric cryptography.
  Symmetric: Same key for encryption and decryption (e.g., AES).
  Asymmetric: Public key for encryption, private key for decryption.
  Real-world applications in secure communications, digital signatures, and data protection.