brainpoolP512r1

brainpoolP512r1 is a 512-bit Brainpool curve providing 256-bit security, the highest security level among Brainpool curves. It offers security comparable to secp521r1 but with different curve parameters designed for transparency. brainpoolP512r1 is extremely slow and has virtually no adoption outside specialized government/military contexts. The curve is specified in RFC 5639 and may be required for certain European security certifications. However, for most applications, X448 or secp384r1 provide better performance at equivalent or higher security levels. brainpoolP512r1 is almost never encountered in real-world TLS traffic.