2026-09-19T22:00:47Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/81880 2023-07-11 col_2142_5131 col_2142_10761 com_2142_5130 com_2142_10755 com_2142_234

2015-09-25T20:20:50Z 10000-01-01 1997 1997 This thesis shows how to obtain efficient, fine-grained (object-level) control over user access to ODB data. We present a target access control model for ODB applications and delineate the trust assumptions required for providing such access control in client-server environments. The prototype implementations of our approach achieve very low overhead while providing object-level access control. By implementing our approach to access control for two major ODB architectures and measuring the resulting prototype's performance on standard ODB benchmarks, we show that when an application is entitled to access all the data it attempts to access, fine-grained access control is achievable with a run-time performance penalty of less than 15%. As the number attempts to access data the application is unauthorized to access increases, performance degrades gracefully. These results demonstrate that fine-grained access controls in ODBs are feasible without the order of magnitude performance degradation--effectively a functional difference--anticipated by the ODB community. Winslett, Marianne Jones, Vicki Ellen 2015-09-25T20:20:50Z Made available in DSpace on 2015-09-25T20:20:50Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9737149.pdf: 5679439 bytes, checksum: a3fa431318b6c51d5c8c0514f281e2e6 (MD5) Previous issue date: 1997 Embargo set by: Seth Robbins for item 83161 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 150 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1997. http://hdl.handle.net/2142/81880 (MiAaPQ)AAI9737149 eng Computer Science Access Control for Client-Server Object Databases text Computer Science Computer Science University of Illinois at Urbana-Champaign Dissertation Ph.D.