Perimeter
9/21/2011
12:34 PM
Taher Elgamal
Taher Elgamal
Commentary
Connect Directly
RSS
E-Mail
50%
50%

Identity Federation: Waiting On Access Control

Separate authentication by websites will remain the reality until access control is done right in Web apps

Identity federation has been talked about lately as the ultimate solution to user authentication on the Web. The basic idea of enabling one site to provide an authentication assertion to another is a good idea, and will likely work in some circumstances. The issue that needs elaboration is what the authentication enables a user to do.

In the Web application space, access control is almost always an immediate result of a successful user login. The question is whether knowledge of a certain website password entitles a user to get access to a financial, healthcare, or some other site. Would your bank ever trust that the some-other site did enough checking on a customer's identity to enable a successful login? And if that is not the case, then how many passwords are we going to have to remember?

It is good to remember that everything we might be able to assert on a user identity is a point on a continuum: There really is no black and white here. So until access control is done correctly in Web applications, I believe that most of the websites will have to provide somewhat separate authentication criteria.

Recognized in the industry as the "inventor of SSL," Dr. Taher Elgamal led the SSL efforts at Netscape. He also wrote the SSL patent and promoted SSL as the Internet security standard within standard committees and the industry. Dr. Elgamal invented several industry and government standards in data security and digital signatures area, including the DSS government standard for digital signatures. In addition to serving on numerous corporate advisory boards, Dr. Elgamal is the Chief Security Officer at Axway, a global provider of multi-enterprise solutions and infrastructure. He holds a Ph.D. and M.S. in Computer Science from Stanford University. View more of his blog posts here.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Flash Poll
Current Issue
Cartoon
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2009-5142
Published: 2014-08-21
Cross-site scripting (XSS) vulnerability in timthumb.php in TimThumb 1.09 and earlier, as used in Mimbo Pro 2.3.1 and other products, allows remote attackers to inject arbitrary web script or HTML via the src parameter.

CVE-2010-5302
Published: 2014-08-21
Cross-site scripting (XSS) vulnerability in timthumb.php in TimThumb before 1.15 as of 20100908 (r88), as used in multiple products, allows remote attackers to inject arbitrary web script or HTML via the QUERY_STRING.

CVE-2010-5303
Published: 2014-08-21
Cross-site scripting (XSS) vulnerability in the displayError function in timthumb.php in TimThumb before 1.15 (r85), as used in multiple products, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to $errorString.

CVE-2014-0965
Published: 2014-08-21
IBM WebSphere Application Server (WAS) 7.0.x before 7.0.0.33, 8.0.x before 8.0.0.9, and 8.5.x before 8.5.5.3 allows remote attackers to obtain sensitive information via a crafted SOAP response.

CVE-2014-3022
Published: 2014-08-21
IBM WebSphere Application Server (WAS) 7.0.x before 7.0.0.33, 8.0.x before 8.0.0.9, and 8.5.x before 8.5.5.3 allows remote attackers to obtain sensitive information via a crafted URL that triggers an error condition.

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Three interviews on critical embedded systems and security, recorded at Black Hat 2014 in Las Vegas.