We discuss the problem of semantic integrity enforcement from two points of view. First we describe three approaches to decrease the overhead of SI enforcement. Second we analyze the cost of several SI enforcement methods in centralized and distributed database systems based on slow and fast (...
[25] formulated attacks as search problems (e.g., identifying protection guards in the application can be formulated as a search problem). To the best of our knowledge, no study has addressed the difficulty of discovering protection techniques. In our survey, however, we found four techniques ...
The problem of enforcing confidentiality in the presence of integrity constraints in secure and, in particular, in multi level databases is still open. To enforce confidentiality the majority of previous works either advocates a violation of integrity or proposes pragmatically its preservation or restorat...
If one of the computer centers is destroyed physically, the bank may lose a few transactions updated in the destroyed computer center and not yet propagated to the other center. However, this is not a problem in a bank, as all transactions may be logged in the branch office server for ...
In capability of CSP: Managing big cloud storage may create a data loss problem for CSP due to lack of insufficient computational capacity, sometimes cannot meet user’s requirement, missing a user-friendly data serialization standard with easily readable and editable syntax, due to changes of a ...
Oracle introduces two new diagnostic concepts in Oracle Database 11: problems and incidents. These concepts are crucial to the understanding of the new fault diagnosability infrastructure Any critical error in the database is called a problem for example, a critical error such as the one manifested...
DTS_W_PROBLEMOCCURREDWITHFOLLOWINGMESSAGE 欄位 DTS_W_PROCESSCONFIGURATIONFAILEDSET 欄位 DTS_W_READEXTMAPFAILED 欄位 DTS_W_REDIRECTWITHNOATTACHEDERROROUTPUTS 欄位 DTS_W_REGISTRYCONFIGURATIONTYPENOTFOUND 欄位 DTS_W_REGISTRYCONFIGURATIONVALUENOTFOUND 欄位 DTS_W_SENDMAILTASK_AT_MISSING_IN_FROM 欄位 DTS...
Define the problem in your own words using examples from the case. What are the two basic functions used in encryption algorithms? What is data security compliance? List at least four sources of risk in a systems analysis and design project, ...
In a multilevel database, certain integrity and clas- sification constraints create a secrecy problem since data additions, deletions or modifications require accessing data at higher levels. In many cases, however, these constraints may be approximated by a series of simpler constraints, called ...
Inserting a row in a parent table never gives this problem because it simply becomes a parent without children. Updating the foreign key in a child record is a different form of this problem. If the foreign key is modified by an UPDATE statement, the new value must match some primary key...