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Hemanshu Nigam

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LinkedIn Reminds Us: A Different Password for Every Site Is Critical

Posted: 06/13/2012 9:00 am

Recent attacks on LinkedIn and eHarmony highlight the importance of different passwords for different sites. LinkedIn confirmed that there had been a breach in their security whereby hackers stole approximately 6.5 million encrypted passwords. eHarmony also announced a breach in their security where 1.5 million passwords were stolen in the attack. Large-scale attacks such as these are becoming more common. Epsilon and a number of other companies, as we have discussed in previous blogs, fell victim to theft as well. In all of this hacking activity, there is one simple lesson -- if all your passwords are the same on each site you use and someone fraudulently obtains your login info for one site, they will have obtained access to all your sites in one small coup.

Case in point. A colleague of mine recently learned a difficult lesson when her computer was stolen from her car. At first, she was mostly concerned about having lost all of the work (she's a writer) that was stored on her machine. Sadly, there was a lot more than poetry at stake: her entire identity was at risk.

While using one password for all the secure sites she visited seemed smart at the time, it turned out to be a disaster. It was anything but smart. One little password gave the thief access to literally every aspect of her life: banking records, bills, medical records, emails, social networks and more. A simple trick of creating a new password for every important, secure site you visit can keep you from this kind of tragedy.

To put this in perspective, think of what we already do in the real world. We have a different key for everything that matters -- house, car, safe-deposit box, gym locker, work, file cabinet, desk drawers, etc. And yet, many of us do what my colleague did -- use the same password across multiple websites.

The good news is that creating a more secure cyber life for yourself is not that hard. Exercise caution in choosing passwords by selecting passwords that can't easily be connected to you, like names of loved ones or important dates. If you have a laptop you frequently take out of the house, consider turning off your browser's password storage function. You'll likely find this function in the Tools or Preferences menus.

Most importantly, use a different password for every site that matters, just like you do with your keys. Examples of sites that matter are sites for banking, mortgage payments, bill pay services, online shopping and social media sites. Choosing passwords with combinations of letters and numbers is a good idea.

As I said in a recent Washington Post article talking about the LinkedIn breach, companies also have a role to play in protecting user information. Companies must think about security and privacy from the moment they begin designing their products to better head-off hacker attacks, particularly as policy-makers push for data breach legislation. If they can make accessing their data too difficult, criminals will head elsewhere.

Thanks to mobile apps, websites and add-ons, tracking so many passwords doesn't have to be daunting. For example, try using software like Password Locker and the app SecureSafe are great examples of methods to save passwords.

Choosing hack-proof passwords and different log-ins for different sites have saved thousands of people money, time, and hassle by making their personal and financial information that much more secure.

And we can all appreciate a little more security and peace of mind online.

For more of Hemu's thoughts on safety, security, and privacy, please visit www.hemunigam.com.

 

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04:50 PM on 06/14/2012
I closed my LinkedIn account as soon as the news broke.
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05:27 AM on 06/14/2012
I find it easier to have different levels of passwords. One for social media / forum logins, where there is no security whatsoever, and I can expect that it might easily be hacked but the consequences aren't too dire. Something completely different (and stronger) for anything related to payment systems or confidential information.
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08:03 PM on 06/13/2012
Yeah, I'll get right on that. One thousand unique passwords, coming up!
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10:57 AM on 06/14/2012
Use a password manager. They are free.
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01:26 PM on 06/13/2012
Personally I have a list of 6 3-letter and/or number sequences that I use in random ways to make a 6 character password. That way even if I forget a password I can usually brute force it and try all the permutations, and if someone cracks one it cannot possibly lead to the others (unless he can somehow read my mind and know all the 3-letter sequences that I use)
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05:22 PM on 06/13/2012
A 6 letter and number password combination is actually really bad. Here's why. Numerous tools exist to brute force passwords. For online passwords, the most common scenario of an attacker getting a hold of them is via an SQL injection nowadays. Many sites still use vanilla MD5 for their hash. With the use of my videocard and something like oclhashcat, I can personally get about 6,000,000,000 password guesses per second against an MD5 hashed password. Your password method only results in a total of 2,238,976,116 different possible passwords, which means I could brute force any of your passwords in less than a second.

Most people don't know this and, to be fair, I don't blame them. People have been horribly miseducated about password security. But, in the end, what you really want is a relatively long password which uses a mix of numbers, lowercase, uppercase and symbols. Using a password locker application is great for this, as most will generate them for you and store it in an encrypted file. Then, all you have to do is remember the password for the actual app.
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01:39 PM on 06/14/2012
Ha, very cool. I have never been a software person to be honest, more hardware (and even at that I am no genius), so this is very very interesting to me.
I didn't realize you could brute force it like that, I wonder how come anyone has an untempered with account on anything if that's the case.....
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12:46 PM on 06/13/2012
I remain frankly unconvinced that LinkedIn would not automatically know to store a hashed (hence, unrecoverable) version of any password in their database. It is such a standard practice in our industry that I simply am not ready to accept that they in fact stored their passwords "in the clear."
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07:51 AM on 06/14/2012
The passwords were hashed with MD5, but not salted - i.e. adding a known series of characters to the password to increase the uniqueness of the hash. There are ways to minimize the time it takes to guess a hashed MD5 password - it is widely considered to be broken. If the salt is long and complicated enough, however, it will take an unreasonably long time and resources to guess the correct password - months instead of seconds.