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  1.  Home
  2. PCTECH
  3. April 2019

Re: Email blocking inbound credit card numbers

So an encrypted file does not count as file/folder encryption?

-----Original Message-----
From: PcTech <pctech-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of John Jones
Sent: Wednesday, April 17, 2019 9:04 PM
To: PC Technical Discussion for IBM i (AS/400 and iSeries) Users <pctech@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PCTECH] Email blocking inbound credit card numbers

Short answer is no. PCI data stored in production databases needs to be encrypted at rest. Typically that involves disk encryption, file/folder encryption, or column encryption within tables (transparent data encryption or similar).

Also, PCI data in transport needs to be encrypted when sent over public networks.

PCI also requires encryption key management so sending something encrypted without a key management process to rotate the keys, have assigned key custodians, etc. is only a partial pass of the controls.

On Wed, Apr 17, 2019 at 1:33 PM Rob Berendt <rob@xxxxxxxxx> wrote:

Kind of curious. If the sensitive information is in an encrypted
attachment does that exclude tossing in the whole email system for review?

-----Original Message-----
From: PcTech <pctech-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of John
Jones
Sent: Wednesday, April 17, 2019 2:14 PM
To: PC Technical Discussion for IBM i (AS/400 and iSeries) Users <
pctech@xxxxxxxxxxxxxxxxxx>
Cc: David Gibbs <david@xxxxxxxxxxxx>
Subject: Re: [PCTECH] Email blocking inbound credit card numbers

If you're a merchant, service provider, or other processor in the PCI
chain and you take CCs via email then your entire email system may be
considered in-scope by your PCI assessor and the full DSS applies.
Which means encryption everywhere, physical access reviews, etc.
Generally, even if you use Office365, G Suite, or some other hosted
solution, this is non-trivial and non-cheap.

Also, rejecting CCs sent via email might, just might, slowly train a
few people to think before they send sensitive information via
insecure channels.

Downside is that a lot of numbers can match the Luhn check so false
positive rate can be high unless the logic looks for other things.

(I own the PCI compliance program for a Level 1 service provider)

On Wed, Apr 17, 2019 at 10:41 AM Jim Oberholtzer <
midrangel@xxxxxxxxxxxxxxxxx> wrote:

I would not want the liability of getting onto my system in the
first place....


--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: PcTech <pctech-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of David
Gibbs via PcTech
Sent: Wednesday, April 17, 2019 10:39 AM
To: pctech@xxxxxxxxxxxxxxxxxx
Cc: David Gibbs <david@xxxxxxxxxxxx>
Subject: [PCTECH] Email blocking inbound credit card numbers

I've noticed something kind of interesting on the mailing lists recently.

Some mail servers are blocking inbound email that appear to contain
credit card numbers.

I can understand restrictions on filtering outbound mail that might
contain credit card numbers. While it's obviously not a good idea to
send a credit card number in email, why would a company block mail
that
does contain one?

david

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History has taught us that we don't learn from the past.
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History has taught us that we don't learn from the past.
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