secp384r1

secp384r1 (P-384) is a NIST curve providing 192-bit security, suitable for highly sensitive government and military applications. It is required for TOP SECRET data in U.S. government systems (NSA Suite B). The increased key size provides security margins against future quantum computers and cryptanalysis advances. However, secp384r1 is significantly slower than secp256r1 and X25519, with performance penalties of 2-3x. Most commercial applications do not require this security level and prefer faster curves. Browser support is universal but rarely used in practice except for government sites.