Tim van de Kamp Andreas Peter 0001 Willem Jonker A multi-authority approach to various predicate encryption types. 363-390 2020 88 Des. Codes Cryptogr. 2 https://doi.org/10.1007/s10623-019-00686-x https://www.wikidata.org/entity/Q123284677 db/journals/dcc/dcc88.html#KampPJ20