Tired of memorizing passwords? A Turing Award winner came up with this algorithmic trick

# Tired of memorizing passwords? A Turing Award winner came up with this algorithmic trick

You'll need to practice ahead of time, but the rest is fairly simple

Passwords are a bane of life on the Internet, but one Turing Award winner has an algorithmic approach that he thinks can make them not only easier to manage but also more secure.

The average user has some 20 passwords today, and in general the easier they are to remember, the less secure they are. When passwords are used across multiple websites, they become even weaker.

Manuel Blum, a professor of computer science at Carnegie Mellon University who won the Turing Award in 1995, has been working on what he calls "human computable" passwords that are not only relatively secure but also don't require us to memorize a different one for each site. Instead, we learn ahead of time an algorithm and a personal, private key, and we use them with the website's name to create and re-create our own unique passwords on the fly for any website at any time.

"I don't even have to remember if I have a password" for a given site, Blum explained last week at the Heidelberg Laureate Forum in Germany. Asked recently by his wife for his password on the REI website, for instance, "I could honestly say, I don't know if I'm registered at REI, but if I am, then my password is...."

Essentially, the idea is that your algorithm and key give you an alternate letter or number for each letter in a website's name; that transformed set of values becomes your site-specific password.

Here's an example: One person's key might consist of a six-by-six matrix created from all 26 letters of the alphabet and all 10 digits, but not in the standard order. Rather, the first row consists of the first six letters on a Linotype typesetting machine: E, A, T, O, I and N. The remaining letters are likewise arranged according to the order used in those old devices, followed by the digits 0 through 9.

To transform a website name into a password, the user would use the matrix in combination with an algorithm dictating which letter gets replaced by what. Blum's example used a system following the directions on a compass. Starting with the first letter of the site name, the user goes "north" by one spot on the matrix to find the replacement for that letter. Next, he finds the second letter of the site name on the matrix and moves "east" to find the value to replace that one, followed by moving "south" to find the replacement for the third, "west" for the fourth, and so on until the entire website name has been encoded.

"Amazon," for instance, becomes "5FHX7E" for a password using this scheme, but you don't have to memorize it -- only the scheme itself.

Blum demonstrated his approach with four audience volunteers, who were able to use it successfully after a few minutes of training.

There are many possible algorithms that could be used -- compass directions are just one example. For sites that require special characters, the user could make it a practice to add a few to the algorithmic results. So he might add "!#\$" to the final password each time.

The system would be tough for a hacker to figure out, Blum said.

"As long as you don't give away more than a few passwords, you'll be secure," he said.

The approach clearly requires some upfront work to select and learn your key and algorithm. The point, however, is that you only have to do that once, as opposed to memorizing every password.

For more information, Blum's talk is available online at the Heidelberg Laureate Forum website, and a paper describing the approach was published last fall.

## Slideshows

### IN PICTURES: Ingram Micro Innovation hits Auckland with Hewlett Packard Enterprise

Ingram Micro completed its nationwide roadshow in Auckland last month, kicking off its Innovation Hour series with Hewlett Packard Enterprise. Uncovering the latest in storage, networking and servers, the event outlined key market trends for resellers in 2016 and beyond.

IN PICTURES: Ingram Micro Innovation hits Auckland with Hewlett Packard Enterprise

### IN PICTURES: FireEye celebrates channel at 2016 Partner Conference

FireEye welcomed 143 channel partners and distributors to FireEye's 2016 annual Partner Conference, FireEye A/NZ Momentum - held at Establishment in Sydney. Delegates heard from senior trans-Tasman channel leaders, marketing and the product divisions in the morning, with FireEye customers, incident responders and threat intelligence analysts sharing knowledge during the afternoon.

IN PICTURES: FireEye celebrates channel at 2016 Partner Conference

### ​IN PICTURES: Disruption in the data centre - Can the Kiwi channel capitalise?​

With New Zealand businesses now open to innovation, the industry sits on the cusp of significant disruption in the data centre. Driven by software-defined networking, the future of the data centre is fast becoming reality, as the channel seeks to keep up, keep innovating and keep growing. APC by Schneider Electric, Lenovo and key partners outlined how the channel can capitalise at The Grill restaurant in Auckland.

​IN PICTURES: Disruption in the data centre - Can the Kiwi channel capitalise?​

## Latest News

Sep 23
More than half of PCs don't have Windows 10 AU yet, and no one's quite sure why
Sep 23
Yahoo data breach affects at least 500 million users
Sep 22
A Cisco-Salesforce deal means collaboration will come to you
Sep 22
StorageCraft ramps up cloud, recovery and back-up play with acquisition
More News

View all events