Securing your HDFC credit card information online is paramount. When you login your HDFC credit card account online, ensure you're on the legitimate HDFC Bank website. Make sure to double-check the URL and look for the https://applyonline.hdfcbank.com/cards/credit-cards.html?Channel=DSA&DSACode=XTML&SMCode=S47339&LGCode=DGPI&LCCode=XTML&LC2=KPT1746#nbb