English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Security administration is harder in databases that have multiple tiers of derived data, such as federations, warehouses, or systems with many views. Metadata (e.g., security requirements) expressed at each tier must be visible and understood at the other tier. We describe several use cases in which tiers negotiate to reconcile their business requirements. The sources must grant enough privileges for the derived tier to support the applications; the derived tier must enforce enough restrictions so that the sources' concerns are met; and the relationship between the privileges at source and derived tier must be visible and auditable. The guiding principle is that a security policy should primarily govern information; controls over source tables and views from which the information can be obtained are intended to implement such policies. We require a kind of global consistency of policy, based on what information owners assert about tables and views. Deviations are primarily a local affair, and must occur within safe bounds. Our theory examines view definitions, and includes query rewrite rules, differing granularities, and permissions granted on views. Finally, we identify open problems for researchers and tool vendors.

Security Administration for Federations, Warehouses, and Other Derived Data