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Our approach to protecting sensitive information in directory services is to encrypt
that information using user-controlled keys and to provide access to that
data using user-controlled delegation. This user-centric approach follows current
trends in computer security and privacy, but should not interfere with more
traditional approaches to access control. Our approach also maintains usability
with existing client applications and source directories. To better understand the
overall picture of our solution, it is first important to understand various key
components.
However, this approach presents several computer diagrams usability and security problems. First
of all, the confidentiality of the data relies entirely on the shared key. If a malicious
user were to obtain this key, or if an authorized user were to share it with
an unauthorized party, the information could be compromised. Data confidentiality
could be provided by using an asymmetric encryption algorithm, such as
RSA, but this still does not protect the data from unauthorized access
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