Online retailers are the most at risk for the theft of electronic-based credit card data due to the nature of their business, which involves processing a large volume of transactions over the internet. This exposes them to various cyber threats, includinghacking, phishing, and other forms of cyber-attacks that can compromise credit card information. Traditional market traders, mail delivery businesses, and agricultural producers typically do not handle credit card transactions to the same extent or in the same electronic manner as online retailers, making them less likely targets for this specific type of data theft.

The principles of Information Security Management emphasize the importance of protecting sensitive data, such as credit card information, through technical security controls and risk management practices. Online retailers must implement robust security measures, including encryption, secure payment gateways, and regular security audits, to mitigate the risks associated with electronic transactions12.

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BCS Information Security Management Principles, particularly the sections on Technical Security Controls and Information Risk, provide guidance on protecting electronic data and managing the associated risks1.

Additional insights can be found in the Information Security Management Principles, 3rd Edition by Andy Taylor, David Alexander, Amanda Finch, David Sutton2.