P-384 is the elliptic curve currently specified in Commercial National Security Algorithm Suite for the ECDSA and ECDH algorithms. It is a 384-bit curve over a finite field of prime order approximately 394×10113. Its binary representation has 384 bits, with a simple pattern. The curve is given by the equation y2 = x3 − 3x + b, where b is given by a certain 384-bit number. The curve has order less than the field size. The bit-length of a key is considered to be that of the order of the curve, which is also 384 bits.
Notes
External links FIPS 186-4 standards where the curve is defined [1] Commercial National Security Algorithm (CNSA) Suite Factsheet [2]