Encryption and Key Management

Encryption and Key Management are critical aspects of cybersecurity covered in the CompTIA Security+ certification. Encryption transforms readable data (plaintext) into unreadable format (ciphertext) using mathematical algorithms and keys. This protects confidentiality of data both at rest and in transit. There are two primary types: symmetric encryption uses the same key for encryption and decryption (examples include AES, DES, 3DES), while asymmetric encryption uses public and private key pairs (like RSA, ECC). Key Management involves the entire lifecycle of cryptographic keys and includes: 1. Key Generation: Creating strong, random keys using secure methods 2. Key Distribution: Securely sharing keys with authorized parties 3. Key Storage: Protecting keys from unauthorized access 4. Key Rotation: Periodically changing keys to limit exposure 5. Key Revocation: Invalidating compromised keys 6. Key Destruction: Securely removing keys after their useful life Best practices include: - Using hardware security modules (HSMs) for key storage - Implementing key escrow systems for recovery - Following principle of least privilege for key access - Maintaining separation of duties for key management tasks - Documenting key management procedures - Regular auditing of key usage Certificate management is closely related, involving digital certificates that bind public keys to entities and are managed through Public Key Infrastructure (PKI). Challenges include managing keys across diverse environments, balancing security with usability, and preventing key compromise. For Security+ certification, understand encryption types, key management principles, common protocols (TLS/SSL), and how to implement these technologies to protect organizational assets.

Encryption and Key Management are critical aspects of cybersecurity covered in the CompTIA Security+ certification. Encryption transforms readable data (plaintext) into unreadable format (ciphertext…

Concepts covered: Key Exchange, Certificate Authorities, Elliptic Curve Cryptography, Block Ciphers, Digital Certificates, Key Management, Cryptographic Hardware and HSMs, Cryptographic Key Length, Stream Ciphers, Cryptographic Hash Functions, Cryptographic Protocol, Key Length and Strength