Media type: E-Article Title: Security of tzeng's time-bound key assignment scheme for access control in a hierarchy Contributor: Xun Yi; Yiming Ye Published: Institute of Electrical and Electronics Engineers (IEEE), 2003 Published in: IEEE Transactions on Knowledge and Data Engineering, 15 (2003) 4, Seite 1054-1055 Language: English DOI: 10.1109/tkde.2003.1209023 ISSN: 1041-4347 Origination: Footnote: