Cyber & IT Supervisory Forum - Additional Resources

TLP:GREEN

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Telephone Numbers And Text Messages Our cell phone numbers are a single point of failure as we use them to sign up to sites and services, log into an apps, reset our account if we forget our passwords as well as for two-factor authentication to securely login to our accounts. Just think of every site and service that has your phone number. That is why you need to protect your phone number. With your phone number, a threat actor can start hijacking your accounts and spoof your identity. 250 Telephone Number Safety Recommendations There are many ways your phone number is exposed, and you might not be aware how many ways your data is shared online. 251  Your phone number could be linked to your social media or other online account. Check the settings on your social media profiles to make sure personal information like your phone number is made private.  You overshared your phone number. You may have entered your information for a free trial, contest, or other online form, which potentially opened you up to receiving unwanted calls.  You accepted the terms and conditions without reading the entire Terms of Service. Make sure to read the terms and conditions to see exactly where your information is being shared.  You supplied your phone number for a product you bought. You also may supply your phone number to retailers for loyalty points or discounts.  Your phone number was part of a data breach, making you easily accessible to scammers. Companies involved in data breaches must show what information was exposed. If you are unsure whether your information was included, call the company directly and inquire. 12.13.1 Block Unwanted Robocalls The major wireless providers offer various tools and solutions that you can engage or may be built into your device to block or flag calls. 252

AT&T Call Protect 253 Verizon Call Filter 254

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 T-Mobile Scam ID, Scam Block, Name ID 255  U.S. Cellular Call Guardian 256

12.13.1.1 Use Built In Mobile Phone Features Use features built into your phone to block unwanted calls. To learn more, check out guides for iOS 257 and Android 258 or visit your device manufacturer’s website. 12.13.1.2 Do-Not-Call Registry Adding your number to the Do-Not-Call Registry 259 prohibits telemarketers from calling your registered number.

12.13.1.3 Reporting Robocalls to the FCC or FTC You can file a complaint with the FCC 260 or FTC 261 if you receive robocalls you believe to be spam. 262

TLP:GREEN