An effective directory service system -- Oracle Internet Directory is used to build a campus uniform identity authentication system based on directory service to solve the problem.

Oracle Internet Directory and its Security Analysis;

Application of the Life Sciences Platform Based on Oracle to Biomedical Informations;

The Backup and Recovery for ORACLE of HIS;

Study of Technique on DICOM Medical Images Management System with Oracle;

Research of Oracle Database Application Security Problems;

Extending of Spatial Data Types and Spatial Functions in Oracle;

Using XSU to exchange data between Oracle and XML;

We show that when the attacker has access to an electronic codebook(ECB)oracle,the plaintext cipher block chaining mode(PCBC) can be easily attacked;when the attacker has access to an PCBC oracle,then ECB;cipher block chaining mode(CBC);cipher feedback mode(CFB);output feedback mode(OFB)can be attacked with ease.

In the process of Diffie-Hellman key agreement, if there was an oracle OF,∈ and a polynomial F(X) such that given rx and ry, it output F(rxy)with probability at least ε (0), otherwise it gave the wrong messages, then one could compute the secrete keys in all cases.