Posts Tagged ‘Security

30
Apr
10

Credit Card VANs

This was the question I was asked on Aadvark. This was the explanation I found on Citi Banks website.

By using Virtual Account Numbers, you get peace of mind knowing that your actual credit card number is never revealed to merchants, so it can’t be stolen from their files. Plus, each number can only be used with a single merchant, so it will be void if someone tries to use it elsewhere.

How does it work?

With this service, you never have to give out your real credit card number when shopping online. Instead, a substitute credit card number is generated to take the place of your real account number. Every purchase you make with Virtual Account Numbers will appear on your card statement, just like any other transaction. It’s the safe way to shop online.

How to use?

Step 1

First, you’ll need to log into your credit card account online. Most credit card companies put their virtual account number option in their “Tools” or “Services” menu.

Step 2

Click on the “Tools” menu and click on the link to “Generate a Virtual Account Number.”

Step 3

Most companies offer two options. Users may download a program that runs from their computers and is stored for later use or they may use the browser option, which runs directly from the credit card website.

Step 4

Choose whichever option suits your needs, then run the program following the instructions on the website. You may need to disable pop-up blockers to see the account number.

Step 5

The next window will display a virtual account number, an expiration date and the CVV (Card Verification Value) for use online. Write this information down.

Step 6

Now go shopping! When you are ready to checkout, enter the virtual card number at checkout instead of your actual account number. Be sure to use the expiration date and CVV assigned to the virtual number.

Step 7
If you are finished with the account number, you can log back into your credit card account and delete it. If not, check the expiration date provided and keep shopping!

Source: eHow

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12
Apr
10

Power Doors

This article was triggered by a read that one can unlock the car using a mobile phone. The mobile signal frequency might just match with the frequency of the “unlock wave” and hence. Lets see how they work.

Here are some of the ways that you can unlock car doors:

  • With a key
  • By pressing the unlock button inside the car
  • By using the combination lock on the outside of the door
  • By pulling up the knob on the inside of the door
  • With a keyless-entry remote control
  • By a signal from a control center

In some cars that have power door locks, the lock/unlock switch actually sends power to the actuators that unlock the door. But in more complicated systems that have several ways to lock and unlock the doors, the body controller decides when to do the unlocking.

The body controller is a computer in your car. It takes care of a lot of the little things that make your car friendlier — for instance, it makes sure the interior lights stay on until you start the car, and it beeps at you if you leave your headlights on or leave the keys in the ignition.

In the case of power door locks, the body controller monitors all of the possible sources of an “unlock” or “lock” signal. It monitors a door-mounted touchpad and unlocks the doors when the correct code is entered. It monitors a radio frequency and unlocks the doors when it receives the correct digital code from the radio transmitter in your key fob, and also monitors the switches inside the car. When it receives a signal from any of these sources, it provides power to the actuator that unlocks or locks the doors.

And if one can replicate this signal, this frequency, things can work!




So what’s this blog about?

Another attempt? Well yes. Attempting to figure out another sustainable model (there are some other attempts going on parallel-ly). Well, we have a lot of questions in mind. we read up stuff, we do some research to find answers to these questions. This is an attempt to publish that little 15-20 minute research.
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