We help IT Professionals succeed at work.
Get Started

one-way data "masking" MD5 sql

1,073 Views
Last Modified: 2016-11-08
Refer to attached sql script which my DBA colleague plan to use to
"mask" sensitive data in the DB (I presume it's Oracle).

Q1:
Is this a 1-way hashing or the 'masked' data can be 'unhashed' back?

Q2:
Is this MD5 the industry practice or there are more secure ways of 'masking' it

Q3:
How do people verify the 'hashed' data?   Do we do 'norows export' & randomly
check the exported tables or is there a way to export out table by table of the
hashed tables?

Q4:
What are the things to look out for in the logs to verify this 'masking' process
completed successfully or how can I amend this script further so that it will
log down its activities for verification?

Q5:
How does the script ensure that the keys that link the various tables are 'hashed'
together so that it does not break the entity relationship & the 'masked' database
can still be used by the vendor we're sending this database to?

Q6:
How do people normally send such a 'masked' Oracle DB out : by encrypted tapes
or USB HDD or slowly via sftp over Internet?
Comment
Watch Question
CERTIFIED EXPERT
Most Valuable Expert 2012
Distinguished Expert 2020
Commented:
This problem has been solved!
Unlock 10 Answers and 25 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE