Title:
Efficiency and Security Trade-Off in Supporting Range Queries on Encrypted Databases
Efficiency and Security Trade-Off in Supporting Range Queries on Encrypted Databases
Author(s)
Omiecinski, Edward
Li, Jun
Li, Jun
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Abstract
The database-as-a-service (DAS) model is a newly emerging computing paradigm,
where the DBMS functions are outsourced. It is desirable to store data on database
servers in encrypted form to reduce security and privacy risks since the server may not
be fully trusted. But this usually implies that one has to sacrifice functionality and
efficiency for security. Several approaches have been proposed in recent literature
for efficiently supporting queries on encrypted databases. These approaches differ
from each other in how the index of attribute values is created. Random one-to-one
mapping and order-preserving are two examples. In this paper we will adapt a prefix-
preserving encryption scheme to create the index. Certainly, all these approaches look
for a convenient trade-off between efficiency and security. In this paper we will discuss
the security issues and efficiency of these approaches for supporting range queries on
encrypted numeric data.
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Date Issued
2005
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342519 bytes
Resource Type
Text
Resource Subtype
Technical Report