What type of devices does PCI PTS address in its security measures?

The PCI PTS (Payment Card Industry PIN Transaction Security) standard specifically focuses on cardholder-interface devices, which include equipment like point-of-sale terminals and ATMs that interact directly with consumers during the process of card transactions. These devices play a crucial role in ensuring secure payment transactions by safeguarding sensitive cardholder data, such as PINs and card numbers, which are entered during a payment.

The standard outlines security requirements for the design and management of these devices to protect against threats such as skimming, tampering, and data breaches. By emphasizing the security of cardholder-interface devices, PCI PTS aims to enhance overall transaction security at the physical touchpoints where consumers interact with payment systems.

The other choices refer to different components of the payment ecosystem that may have their own security requirements but do not fall under the specific scope of PCI PTS. Server-based applications, wireless payment processing tools, and online transaction systems handle transaction processing and management but do not directly interface with cardholders in the same manner as the devices identified in the correct answer.