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2. Add images to your signature in AOL Mail

   help.aol.com/articles/add-images-to-your...

   After you've added an image to your signature, you can adjust its size in the signature box. In AOL Mail, click the Settings icon | choose More Settings. Click Writing email. Go to the Signature section. Hover your cursor over the image in the signature box | click the three dots. Choose the image size you'd like from the list:-Small-Medium-Large

3. Optical character recognition - Wikipedia

   en.wikipedia.org/wiki/Optical_character_recognition

   Video of the process of scanning and real-time optical character recognition (OCR) with a portable scanner. Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene photo (for example the text on signs and ...

4. Digital signature - Wikipedia

   en.wikipedia.org/wiki/Digital_signature

   A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]

5. Add, edit, or disable your signature in AOL Mail

   help.aol.com/articles/add-edit-or-disable-your...

   Create a personalized email signature to automatically add to each outgoing email. This feature ensures all your AOL messages maintain a consistent, professional look with minimal effort. 1. Click the Settings Menu icon | select More Settings. 2. Click Writing email. 3. Click the Toggle button to enable or disable a signature for your email ...

6. Cryptographic hash function - Wikipedia

   en.wikipedia.org/wiki/Cryptographic_hash_function

   Almost all digital signature schemes require a cryptographic hash to be calculated over the message. This allows the signature calculation to be performed on the relatively small, statically sized hash digest. The message is considered authentic if the signature verification succeeds given the signature and recalculated hash digest over the ...

7. Elliptic Curve Digital Signature Algorithm - Wikipedia

   en.wikipedia.org/wiki/Elliptic_Curve_Digital...

   The signature is valid if , matches Alice's public key. The signature is invalid if all the possible R points have been tried and none match Alice's public key. Note that an invalid signature, or a signature from a different message, will result in the recovery of an incorrect public key.