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Nov
09
2009
Password Protection ของ Oracle database 11g
Written by Administrator   

บทความนี้จะพูดถึง วิธีการเตรียมการป้องกัน Password ของ Oracle ให้มีความปลอดภัยได้อย่างไร

 

1. Enforce case sensitivity passwords :

          สำหรับ  Oracle database 11g คุณสามารถเลือกให้ Password เป็นแบบ Case – Sensitive   ได้  โดยสามารถกำหนดได้ที่ พารามิเตอร์   SEC_CASE_SENSITIVE_LOGON   ด้วยการใช้ คำสั่ง ALTER   

    ถ้ากำหนดเป็น TRUE หมายความว่า  password เป็นแบบ  Case – Sensitive  

  แต่ถ้ากำหนดเป็น FALSE หมายความว่า password  ไม่เป็นแบบ  Case – Sensitive 

 

ตัวอย่างคำสั่ง

 

Alter system set sec_case_sensitive_logon = TRUE

 

 

2.Password complexity checking  :  

       เป็นการทำให้ password มีความซับซ้อนเพิ่มขึ้น เพื่อป้องกันการใส่ password โดยการเดาสุ่มจากผู้ไม่ประสงค์ดี 

  ไม่สามารถใช้คำในดิกชันนารี มาเป้น password ได้ 

      สำหรับ Oracle database 11g  คุณสามารถกำหนดให้ User ต้องสร้าง password ที่มีความปลอดภัยมากพอ

   ถึงจะสามารถใช้เป็น password ได้

 

    Oracle เตรียมฟังก์ชันการตรวจสอบ password  โดย PL/SQL สคริปต์ที่ชื่อว่า UTPLWDMG.SQL  (อยู่ใน in      $ORACLE_HOME/ORACLE_HOME/RDBMS/ADMIN )

 

  UTPLWDMG.SQL Script ตรวจสอบเงื่อนไขต่อไปนี้  เมื่อ User ทำการสร้างหรือแก้ไข password

   

     -         ประกอบด้วย ตัวอักษร อย่างน้อย 8 ตัวอักษร และ ไม่มากกว่า 30 ตัวอักษร

     -         ไม่ตรงกันกับชื่อ User

     -         ไม่ตรงกันกับชื่อเครื่อง

     -         ไม่ตรงกันกับคำที่อยู่ใน Dictionary  หรือ  เช่น  welcome1 , oracle123 , oracle user1234 เป็นต้น

     -         ต้องประกอบด้วย ตัวเลขอย่างน้อย 1 ตัวและ ตัวอักษร 1 ตัว

     -         กรณีเปลี่ยน password  password ใหม่ต้องไม่ตรงกับ password เดิมอย่างน้อย 3 ตัว

 

 

Ref: OracleDatabase Security Guide 11g Release 1 (11.1)

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