Heydari Beni, EmadEmadHeydari BeniLagaisse, BertBertLagaisseZhang, RenRenZhangDe Cock, DannyDannyDe CockBeato, FilipeFilipeBeatoJoosen, WouterWouterJoosen2021-10-242021-10-242017https://imec-publications.be/handle/20.500.12860/28498A voucher-based security middleware for secure Business Process OutsourcingProceedings paperhttps://www.springer.com/gp/book/9783319621043