>From glancing at the abstract, https://patents.google.com/patent/US5799086 looks like it might be the one? It also says that it is expired, expiration having been anticipated on 2014-01-13.
-Kyle H On Sun, May 24, 2020, 11:54 Salz, Rich <rs...@akamai.com> wrote: > > - In any case, I am unaware of any existing system which meets your > requirement 3. Admittedly, I haven't specifically searched for such. > > > > CertCo (now defunct, don’t know who has the intellectual property) had a > patent that did ALL of the things. RSA keygen, split the key, each key > signs the data, looks like an RSA signature, then when enough have been > done, combine them and it matches the original pre-split public key. That, > and the followon patents, are cool. Don’t know if they’re expired or not. > > > > To answer the main question: OpenSSL doesn’t do anything remotely in this > area. The closest is multi-prime RSA. >
