How to protect Sensitive data is accessible from cache

Question

0.00/5 (No votes)

See more:

How Sensitive data is accessible from cache.
I write below code on Page Load

protected void Page_Load(object sender, EventArgs e)
       {
           Response.ExpiresAbsolute = Convert.ToDateTime("1/1/1980");
           Response.AddHeader("cache-control", "no-store, must-revalidate, private");
           Response.AddHeader("Pragma", "no-cache");
           Response.Cache.SetCacheability(HttpCacheability.NoCache);
           Label1.Text = "sddddddddddddddddddddddddd";
       }

But it does not work when i click on work offline in Firfox and click on the Url from history option.
What is the best practice to avoid Sensitive data is accessible from cache in asp.net.
Also when i click on back button then also previos page content show which is more dangerous as sensitive data leakage issue what can be done to handle such situation.

Posted 6-Feb-14 5:33am

vishal_h

Updated 6-Feb-14 18:01pm

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

JoCodes · Answer 1 · 2014-02-06T18:31:00

Solution 1

Thumb Rule is to never Cache any sensitive data.

Refer

http://msdn.microsoft.com/en-us/library/ff650867.aspx#SensitiveData4[^]

http://web.securityinnovation.com/appsec-weekly/blog/bid/96498/Do-Not-Cache-Sensitive-Data[^]

Tips to secure the Page Containing Sensitive data.

writing-secure-asp-net-code[^]

Posted 6-Feb-14 18:31pm

JoCodes

Comments

vishal_h 7-Feb-14 2:06am

Thanks for the reply but above solution not work on Firfox as its showing the content after click on work offline and click on back button.Solution works on IE properly.

vishal_h 7-Feb-14 5:16am

I write below code but still not able to work in firefox 20.0.1

Response.AppendHeader("Cache-Control", "no-cache") '
Response.AppendHeader("Cache-Control", "private") '
Response.AppendHeader("Cache-Control", "no-store") '
Response.AppendHeader("Cache-Control", "must-revalidate") '
Response.AppendHeader("Cache-Control", "max-stale=0") '
Response.AppendHeader("Cache-Control", "post-check=0") '
Response.AppendHeader("Cache-Control", "pre-check=0") '
Response.AppendHeader("Pragma", "no-cache") '
Response.AppendHeader("Vary", "*")
Response.AppendHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT")