olemus
digitaalsignatuuri moodustamise kahesammuline protseduur
(Even, Goldreich, Micali, 1990):
esimene samm ei sõltu signeeritavast sõnumist ja
tehakse vallasrežiimis, võib olla arvutusmahukas;
teine samm tehakse sidusrežiimis ning on väikese arvutusmahuga ja kiire
=
a signing algorithm that is divided into two phases: the first is offline phase for pre-computation before the message is given,
and the second is online phase for signature extraction allowing to quickly generate a valid signature using the pre-computed values

ülevaateid
https://en.wikipedia.org/wiki/Server-based_signatures

https://medium.com/asecuritysite-when-bob-met-alice/online-offline-signatures-9b473bacbc8e

näiteid
https://eprint.iacr.org/2010/178.pdf

https://www.iacr.org/archive/pkc2006/39580335/39580335.pdf

https://www.hindawi.com/journals/jhe/2020/6654063/

https://www.sciencedirect.com/science/article/abs/pii/S0304397523002554