Re: Credit Card encryption

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Billing Address (at least the street number) is used in conjunction
with the zip code for AVS checks.

On 5/31/10, tedd <tedd.sperling@xxxxxxxxx> wrote:
> At 1:38 AM -0400 5/31/10, Paul M Foster wrote:
>>On Sun, May 30, 2010 at 10:50:05AM -0400, tedd wrote:
>>
>>  > Besides, most credit card processing agencies even require that you
>>>  use the customer's data (cc number, expiry date and CCS) to make the
>>>  sale and then immediately dispose of it afterwards, usually within 24
>>>  hours under a signed agreement. Holding that information for more
>>>  than 24 hours can be a criminal offense regardless of what type of
>>>  hashing you use.
>>
>>Not true. It depends on the type of merchant and the situation.
>
> *blink*
>
> "Not true" and "It depends" are conflicts in logic.
>
> Either what I said is "true" or it isn't -- and if what I said is
> "true" for some (as it is and I can prove it) then what I said is
> indeed "true".
>
> I'm curious, why say it's not "true" and then follow with "it
> depends"? It appears to me that you have your mind made-up and don't
> care to listen to our experiences and recommendations.
>
> That's Okay, but I'm simply telling you what I KNOW to be true. You
> may either accept what I have to say, or reject it, but to reply that
> what I say is "Not true" is somewhat offensive and confrontational. I
> hope you didn't mean it that way. :-)
>
>
>>The PCI
>>validation process allows for storage of all data except the 3-4 digit
>>validation number. What I'm asked for at transaction time is the CC
>>number, expiration date, digits for the billing address, and the billing
>>zip code. And I can get the address and zip digits completely wrong and
>>still have the transaction go through.
>
> Party true.
>
> What data are used in credit card transactions are the: name of the
> card holder, credit card number, expiration date, CCV number, and zip
> code. I have not dealt with any credit card processors that require
> the billing address -- they just use the zip code. Additionally, it
> is up to the client to determine the level of security they want.
> They *can* require that *all* information be correct before accepting
> a sale.
>
> The downside of not requiring *all* the data to be correct is that
> the rate the credit processor charges for the transaction rises.
> Simply and logically put, if you don't get all the information
> correct, then there is risk and that risk is passed on to the client
> via an elevated charge for processing -- look it up.
>
> The up-side of getting only the minimal data is getting a sale under
> a higher risk/rate -- that's the clients choice and they usually
> choose it.
>
>>We've been doing it this way for 14 years and using the type of service
>>you suggest would be expensive and impractical. Only in the last two
>>years has PCI become more stringent in their requirements. And
>>consequently, I'm having to re-evaluate how we store this particular
>>information. Otherwise, our physical and other security is more than
>>adequate. Yes, of course, if you have a machine gun or you're Kevin
>>Mitnick, or you have a network of 20,000 bots pounding on my router,
>>you're coming in anyway. Again, this is about *reasonable* security.
>
> You asked for opinions -- do what you want.  :-)
>
> Cheers,
>
> tedd
>
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