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  2. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    Informally, a message authentication code system consists of three algorithms: A key generation algorithm selects a key from the key space uniformly at random. A MAC generation algorithm efficiently returns a tag given the key and the message. A verifying algorithm efficiently verifies the authenticity of the message given the same key and the tag.

  3. ssh-keygen - Wikipedia

    en.wikipedia.org/wiki/Ssh-keygen

    ssh-keygen is a standard component of the Secure Shell (SSH) protocol suite found on Unix, Unix-like and Microsoft Windows computer systems used to establish secure shell sessions between remote computers over insecure networks, through the use of various cryptographic techniques.

  4. Mutual authentication - Wikipedia

    en.wikipedia.org/wiki/Mutual_authentication

    The message is then decrypted with Bob's secret key, giving Alice's ID. Bob checks if the message matches a valid user. If not, the session is aborted. Bob sends Alice a message back to show that Bob is a valid user. Alice verifies the message: Alice checks the format and timestamp. If either is incorrect or invalid, the session is aborted.

  5. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    If you're caught in a loop where the sign-in screen keeps reappearing after you click "Sign in," you'll need to reset the "sign-in" cookie. After entering your username on the sign-in page, click Not you? Enter your username and password. Click Sign in. If that doesn't fix the problem, try these steps and attempt to sign in after each one:

  6. Secure Shell - Wikipedia

    en.wikipedia.org/wiki/Secure_Shell

    For example, it introduces new key-exchange mechanisms like Diffie–Hellman key exchange, improved data integrity checking via message authentication codes like MD5 or SHA-1, which can be negotiated between client and server.

  7. Fix sending and receiving issues with third-party email apps

    help.aol.com/articles/cant-send-or-receive-email...

    If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem.

  8. Key exchange - Wikipedia

    en.wikipedia.org/wiki/Key_exchange

    Key exchange (also key establishment) is a method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic algorithm.. In the Diffie–Hellman key exchange scheme, each party generates a public/private key pair and distributes the public key.

  9. AOL Help

    prod.origin.help.aol.com

    Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.