Symmetric Key Cryptography

Symmetric key cryptography is a cryptographic method where the same secret key is used for both encryption and decryption of data. It ensures confidentiality by transforming plaintext into ciphertext that can only be read by parties sharing the key. This approach is widely used for securing data at rest and in transit due to its efficiency and speed.

Also known as: Secret Key Cryptography, Private Key Cryptography, Symmetric Encryption, Shared Key Cryptography, Conventional Cryptography

Why learn Symmetric Key Cryptography?

Developers should learn symmetric key cryptography when building systems that require fast and efficient encryption for large volumes of data, such as file encryption, database security, or secure communication protocols like TLS. It is essential for applications where performance is critical and key management can be handled securely, such as in closed systems or with hardware security modules.

Learning Resources

• docs: Symmetric-key cryptography - Wikipedia
• course: Cryptography I - Coursera
• tutorial: Symmetric Encryption Explained in 5 Minutes or Less - Geekflare
• video: Introduction to Cryptography - Khan Academy
• book: Applied Cryptography by Bruce Schneier