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TJX Problem Happened A Lot Sooner Than Announced

Written by Evan Schuman
January 23rd, 2007
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TJX is learning that the trickling out of bad news is a great way to keep a negative story alive and to send distrust as high as possible. Remember that mid-December unauthorized access that it didn’t report until mid-January? Turns out it had taken place almost seven months earlier, back in May 2006. I guess they wanted to make sure the thieves had plenty of time before the public was alerted.

“We had said in our press release that we had discovered the breach in mid-December but we did not put in when it occurred,” TJX spokeswoman Debra McConnell was quoted as saying in a Computerworld story.

Meanwhile, in Pennsylvania, regulators there have decided that the credit card theft was, ironically, too big to require consumer disclosure. “Under a new state law that took effect in June, businesses are required to notify Pennsylvania consumers by letter, telephone or e-mail if sensitive personal data is lost or stolen, exposing them to the risk of identity theft,” reported the Pittsburgh Post-Gazette. “But the AG’s office, which enforces the statute, said yesterday that personal notice is not required if more than 175,000 consumers are involved or if the cost of notification would exceed $100,000.”


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Kill All The Passwords

This article does mention, but does not give enough attention to, the fact that the attacks discussed are only feasible when the encrypted password file can be copied and subjected to an offline attack. The trick is to have authentication performed on a separate, much more strongly secured host - such as an Active Directory Domain Controller, or a Kerberos server, or a NIS+ server, or even using something as banal as an LDAP-over-SSL authentication dialog. In these environments, the odds of the "password file" being stolen and subjected to an offline attack go to near zero, and only online attacks may be carried out by the attacker. With sensible exponential backoff between failed password attempts, lockout after a modest number of failed attempts on a single account, and pattern detection, that minimum 7 character password is quite secure enough. Passwords aren't dead yet for security purposes, and they will be with us for a very long while to come for practical purposes. The trick is to employ them correctly. Read more...
The possibilities you describe are years away from being implemented at best, so for the moment passwords are an ugly reality. Luckily, password managers can easily manage hundreds of passwords of any length. The only thing a user needs to remember is the master password. It seems like an easier task to educate users on how to use password managers rather than implement complex security technology on a global basis. Read more...