20
July
online scratch cards
Dan B asked:


I am trying figure out how to make gift cards for my company that can be redeemed on a website. My primary concern is that someone will be able to generate a valid card code, effectively getting the item for free. I know that B&N has that scratch off on the card, but I’m not sure how that makes it more secure. I’d love to understand this type of security technology better and what companies provide solutions.
I am talking about gift cards that have a redemption code on the back..
Even if we limit the number of attempts that one computer gets to enter an activated card code, someone might still be able to potentially buy a card and generate similar number based off it and find it to be active. I am playing devils advocate because our scale will be fairly large. I am seeing if I can reduce the chances of being cracked to a near impossibility.

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Category : Security

Comments

ForensicGirl July 24, 2008

Welp… if you are talking about a printable gift card that you would redeem later online.. then you are not talking about encryption.

Encryption is using a mathematical algorithm to “encrypt” information. I suggest you look up the term on wikipedia.com for more on encryption.

For paper… you would be talking more about something like watermarking where a unique coding system is embedded into the card that cannot be faked. That’s a whole different animal than encryption.

Good Luck

Agent July 25, 2008

Manually enter the codes into a system. When they enter the code, it needs to be an “activated” code. I don’t really think you need encryption.

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