From https://en.wikipedia.org/wiki/NSA_Suite_B_Cryptography
The Suite B algorithms have been replaced by Commercial National Security Algorithm (CNSA) Suite algorithms:
- Advanced Encryption Standard (AES), per FIPS 197, using 256 bit keys to protect up to TOP SECRET
- Elliptic Curve Diffie-Hellman (ECDH) Key Exchange, per FIPS SP 800-56A, using Curve P-384 to protect up to TOP SECRET.
- Elliptic Curve Digital Signature Algorithm (ECDSA), per FIPS 186-4 Secure Hash Algorithm (SHA), per FIPS 180-4, using SHA-384 to protect up to TOP SECRET.
- Diffie-Hellman (DH) Key Exchange, per RFC 3526, minimum 3072-bit modulus to protect up to TOP SECRET
- RSA for key establishment (NIST SP 800-56B rev 1) and digital signatures (FIPS 186-4), minimum 3072-bit modulus to protect up to TOP SECRET
[0]: https://www.nsa.gov/Resources/Commercial-Solutions-for-Class...