# Signing

From MgmtWiki

## Full Title or Meme

A signature on a digital document is designed to show that the document has not be altered and the identity of the key used to make the signature.

## Solutions

- RSA signing with 3072 bit keys is good enough for TOP SECRET om 2015-08-19, but might not be included in post-quantum cryptography suites.
- See the wiki page Quantum Computing Threat for current status on post-quantum Cryptography.
- Curves Supported by OpenSSL can be discovered by keying (there will typically be many more that shown here)

openssl ecparam -list_curves

IETF name | NIST name | SSL | Description |

secp256k1 | default | Koblitz curve 256 bit SEC | |

secp256r1 | P-256 | default | random curve 256 bit SEC SUITE B |

secp384r1 | P-384 | default | random curve 386 bit SEC SUITE B -OK for TOP SECRET |

secp521r1 | P-521 | default | random curve 521 bit SEC - not worth the extra work |

sect283r1 | Weierstrass curve 283-bit | ||

brainpoolP256r1 | default | ||

brainpoolP384r1 | default | ||

brainpoolP521r1 | default | ||

brainpoolP256t1 |

## References

- Standards for Efficient Cryptography SEC 2: Recommended Elliptic Curve Domain Parameters
- IBM MQ SSL curves supported
- On 2022-08-19 the NSA Commercial National Security Algorithm Suite replaced SUITE B