What is Elliptic Curve Cryptography (ECC)?
D5 · Crypto · CompTIA Security+ SY0-701ECC (Elliptic Curve Cryptography) is an asymmetric cryptographic approach based on the algebraic structure of elliptic curves. It provides equivalent security to RSA with significantly smaller key sizes.
Comparison: 256-bit ECC ≈ 3072-bit RSA in security strength.
Advantages: smaller keys, faster computation, less battery/bandwidth — ideal for mobile and IoT devices.
Common curves: P-256 (NIST), Curve25519 (modern, high-performance).
Comparison: 256-bit ECC ≈ 3072-bit RSA in security strength.
Advantages: smaller keys, faster computation, less battery/bandwidth — ideal for mobile and IoT devices.
Common curves: P-256 (NIST), Curve25519 (modern, high-performance).
ECC is preferred over RSA for new implementations due to efficiency. ECDSA = ECC for digital signatures. ECDH = ECC for key exchange. TLS 1.3 uses ECDHE (Elliptic Curve Diffie-Hellman Ephemeral) for forward secrecy.