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  2. Tax Deduction and Collection Account Number - Wikipedia

    en.wikipedia.org/wiki/Tax_Deduction_and...

    Each tax deductor is uniquely identified by a TAN. The first three characters represent the city or state where the TAN was issued. The fourth character represents first character of the name (company, firm, individual, etc) of the deductor. And the next 5 characters are numerics. And Last character is a letter.

  3. Transaction authentication number - Wikipedia

    en.wikipedia.org/wiki/Transaction_authentication...

    ChipTAN generator (optical version) with bank card attached. The two white arrows mark the borders of the barcode on the computer screen. ChipTAN is a TAN scheme used by many German and Austrian banks. [13] [14] [15] It is known as ChipTAN or Sm@rt-TAN [16] in Germany and as CardTAN in Austria, whereas cardTAN is a technically independent ...

  4. What's a six-digit verification code — and why you should ...

    www.aol.com/whats-six-digit-verification-code...

    Never give a verification code to a stranger. No one should ever ask you for a six-digit verification code — not a stranger on social media, not tech support, not even your bank.

  5. How to stop scammers from coming after your verification ...

    www.aol.com/stop-scammers-coming-verification...

    Our goal with Wallet Warnings remains the same - to help you safeguard your money. If you have any questions or need any additional information about anything discussed here, please call (901) 222 ...

  6. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    We'll send you a text or call you with a new code that needs to be entered at sign-in. The phone number we contact you with may be different each time. Enable 2-step for phone. 1. Sign in to your Account Security page. 2. Next to "2-Step Verification," click Turn on. 3. Select Phone number for your 2-step verification method. 4.

  7. What is a credit card security code? - AOL

    www.aol.com/credit-card-security-code-024109725.html

    Card Verification Code number (CVC) Card Identification number (CID) This number is printed on your card and can’t be found through your online credit card account or on any of your credit card ...

  8. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    Formally, a message authentication code (MAC) system is a triple of efficient [4] algorithms (G, S, V) satisfying: G (key-generator) gives the key k on input 1 n, where n is the security parameter. S (signing) outputs a tag t on the key k and the input string x. V (verifying) outputs accepted or rejected on inputs: the key k, the string x and ...

  9. Why am I asked to verify my account after signing in?

    help.aol.com/articles/why-am-i-asked-to-verify...

    You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following reasons: ... If you've received a ...