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  2. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    Alice signs a message—"Hello Bob!"—by appending a signature computed from the message and her private key. Bob receives both the message and signature. He uses Alice's public key to verify the authenticity of the signed message. A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A ...

  3. Authentication - Wikipedia

    en.wikipedia.org/wiki/Authentication

    When authentication is required of art or physical objects, this proof could be a friend, family member, or colleague attesting to the item's provenance, perhaps by having witnessed the item in its creator's possession. With autographed sports memorabilia, this could involve someone attesting that they witnessed the object being signed.

  4. Digital Signature Algorithm - Wikipedia

    en.wikipedia.org/wiki/Digital_Signature_Algorithm

    The digital signature provides message authentication (the receiver can verify the origin of the message), integrity (the receiver can verify that the message has not been modified since it was signed) and non-repudiation (the sender cannot falsely claim that they have not signed the message).

  5. Major League Baseball Authentication Program - Wikipedia

    en.wikipedia.org/wiki/Major_League_Baseball...

    Baseball autographed by Juan Lagares. Usually the MLB Authentication Program authenticates items used during baseball games, with baseballs and baseball bats being the most common. Other game-used items which are authenticated include "player jerseys, locker tags, lineup cards, the pitching rubber, home plate, broken bats", and base pads.

  6. 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:

  7. Professional Sports Authenticator - Wikipedia

    en.wikipedia.org/wiki/Professional_Sports...

    Getting a card graded by a third-party entity offered the assurance that an image displayed in an eBay listing represented an authentic card. Moreover, this practice provided a clear understanding of the card's condition, eliminating the need to rely on potentially subpar image quality in the listing.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Find and remove unusual activity on your AOL account

    help.aol.com/articles/find-and-remove-unusual...

    • Recent activity - Devices or browsers that recently signed in. • Apps connected to your account - Apps you've given permission to access your info. • Recent account changes - Shows the last 3 password changes. Click show all to see all changes. IP addresses in Recent activity