A botnet which targets shopping tills has been discovered - and it could be responsible for stealing a "titanic volume" of credit card details.
A botnet is a distributed network of computers infected with viruses or malware, which are used to harvest data and send it back to scammers.
But in this instance the viruses also compromised 'point of sale' (PoS) machines, or shopping tills, and managed to send back details of payments taken by unwitting staff.
Up to 20,000 payment cards since August may have been compromised by the botnet, researchers said, though the number could be much higher.
The difference is that the latest scam appears to be much more advanced, researchers said. It uses a more elegant software set-up, in which hackers can monitor individual machines in real time, across a wide area. They can also issue commands to individual machines, sending back data on demand.
In a separate finding, Arbor Networks reported finding a botnet set up to steal credit and debit cards from PoS machines, including in the UK.
It is thought that while the software used to run the botnets is relatively advanced, installing it on machines relies on the same old simple vulnerabilities: poor passwords, a lack of timely security updates and unpatched software.
Travelon Anti-Theft Tote
Travellers looking to carry more than their wallet or purse while abroad may want to look into this tote. Travelon's bag is made of a slash-proof material and featured padded pockets for a tablets and slots that protect traveller's cards and passports from radio frequency identification. The shoulder straps are also made of the same slash proof material as the bag and can lock to chairs or tables thanks to a built-in carabiner. Price: $100 at <a href="http://www.travelonbags.com/" target="_hplink">www.travelonbags.com</a>
Secrid Card Protector
Like Travelon's tote, Secrid's card protector uses a metal casing that reflects radio frequencies attempting to glean your personal information. Price: $89.95
Cactus Creek Subrosa Scarves
Most thieves will aim for the back pockets of traveller's pants or the straps of a purse when pickpocketing, but a scarf? Not as likely. For travellers looking to give thieves the slip, this garment features hidden pockets to stow away credit cards, phones or cash in compartments lined with a material that will also protect against those looking to steal personal information via RFID. Price: $44.95 at <a href="http://www.cactuscreek.ca/" target="_hplink">www.cactuscreek.ca</a>
PacSafe's Anti-Theft Backpack
<strong>PacSafe's Anti-Theft Backpack</strong> On the outside, it's an unassuming backpack but where this accessory shines is in its RFID blocking pockets, turn and lock security hook and "smart Zipper" security designed to prevent zipper tampering. Price: $279 at <a href="http://pacsafe.com/" target="_hplink">www.pacsafe.com</a>
Mancini RFID Secure Mens' Wallet
<strong>Mancini RFID Secure Mens' Wallet </strong> It's leather on the outside and RFID blocking technology on the inside for this classic bi-fold wallet. Price: $45.00 at <a href="http://www.mancinileather.com/home.html" target="_hplink">mancinileather.com</a>
Samsonite RFID Neck Pouch
<strong>Samsonite RFID Neck Pouch</strong> It doesn't look like much but Samsonite designed this pouch to hang from a traveller's neck to foil any attempts from a pickpocket that targets a traveller's pockets or purse. Like the other accessories, it uses a RFID-blocking material to ward off signals that seek a traveller's personal information. Price: $14.97 at <a href="http://www.samsonite.com/" target="_hplink">www.samsonite.com</a>