As the pioneers in phone-based verification, TeleSign knew exactly how to provide a comprehensive SMS based verification solution to help OfferUp. OfferUp indeed implemented a three-pronged solution to increase their security and ensure they could maintain its mission of being the most trusted market place in the industry. The first step was to add SMS verify, a product that leverages 2-factor authentication (2FA) by utilizing a person’s cell phone. While creating an account a six-digit one-time passcode (OTP) is sent to the user’s phone proving that they are indeed the person they say they are. Furthermore, that number is then stored and in the case of a password reset, another OTP is sent to the number on file to help prevent account takeover.
Perhaps most interestingly though OfferUp wanted to know what type of device their customers were using, so they implemented a TeleSign data solution, specifically the Phone ID Device Info API which will return to a business a type of device. This can be helpful for UX reasons. For example the user experience could be optimized differently whether a user is on an iPhone or an Android, but also if a user is customarily using one or the other and a foreign device pops up this can be a red flag for fraud.
All in, OfferUp saw ATO drop dramatically with the implementation of a comprehensive TeleSign security solution. As they move toward universal adoption by their millions of monthly active users the OfferUp platform literally becomes more secure by the day.