None

  Two related keys, a public key and a private key that are used to perform complementary operations, such as encryption and decryption or signature generation.
Source(s):
CNSSI 4009-2015 under asymmetric key FIPS 201-1, NISTIR 7298 Rev. 2

  Two related keys, a public key and a private key, that are used to perform complementary operations, such as encryption and decryption or signature generation and signature verification.
Source(s):
NIST SP 1800-12b under asymmetric keys
FIPS 201 under Asymmetric Keys [version unknown]

  A cryptographic key used with an asymmetric-key (public-key) algorithm. The key may be a private key or a public key.
Source(s):
NIST SP 800-133 under Asymmetric key
NIST SP 800-133 Rev.1 under Asymmetric key

  Two related keys, comprised of a public key and a private key, which are used to perform complementary operations such as encryption and decryption or signature verification and generation.
Source(s):
NIST SP 800-63-3 under Asymmetric Keys

  Two related keys, a public key and a private key that are used to perform complementary operations, such as encryption and decryption or signature generation and signature verification.
Source(s):
NIST SP 800-63-2 under Asymmetric Keys [Superseded]