# What is NIST p256?

## What is NIST p256?

What is NIST p256? The NSA recommends the random curve for government use. It is also known as NIST P-256. Or rather it did recommend P-256 as part of its Suite B of cryptography recommendations. In August 21015 the NSA announced its concern that in the future, quantum computing could render the Suite B methods insecure.

### What is a p256 block cipher?

P256. An elliptic curve that enables NIST P-256 signatures and key agreement. Secondly, is ECC a block cipher? ECC is a form of asymmetric cryptography and is usually used for things such as key exchange or message signing. For encrypting the actual audio data you should probably look into a symmetric encryption algorithm such as AES or Chacha20.

**What is Curve25519 used for?**

Curve25519. In cryptography, Curve25519 is an elliptic curve offering 128 bits of security and designed for use with the elliptic curve Diffie–Hellman (ECDH) key agreement scheme. It is one of the fastest ECC curves and is not covered by any known patents.

**What is sec2 secp256r1?**

It’s instantiation with curve P-256 is specified in FIPS 186-4 (or equivalently in SEC2 under the name secp256r1 ), and tells that it must use the SHA-256 hash defined by FIPS 180-4.