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Prevent Enumeration/Account testing VISA/Master Card

Prevent Enumeration/Account testing VISA/Master Card

Dear Spotify AB,


As I monitor your Websites and Mobile Application when a Sotify AB and Sotify user want to become premium account by link to  credit cards (VISA/MasterCard/Ammerican Express) at your websites/Spotify Mobile application. But your system did not set up the number of attempts, that why fraudster can try many times to detect VISA/Master Card by using brute forcing attack.


So kindly have a solution:

1/ Block SOTIFY Accounts if they try to use brute force to detect valid credit card 2/ Implement CAPTCHA to prevent them try input different Card Information by automatically or scripting tool.


Link websites 

User can try many times with different cards.



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