If you end up needing to make online transactions or purchases while on your travels, only enter credit card information on sites including an «s» (for «secure»). (ordinarytraveler.com)
Sign up for the rewards program and then enter your credit or debit card information in the system's secured website. (rewardexpert.com)
To avoid the temptation, I've deleted the apps from my phone and no longer store credit card information on my laptop. (policygenius.com)