please let me know if there's any digital signature scheme for the following problem. Thanks in advance!
- I want to have a token that's somehow signed (or granted) by multiple 3rd parties for a certain document. The token then can be used to access resources managed by the parties.
- 3rd parties just need to use their private keys to validate the token
I find the Wiki article about Multisignature, but really I don't know how to apply it into my case.