Authentication and Encryption Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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What does authentication mean?

Checking that a user is who they claim to be.

Authentication checks identity. Authorisation decides what you are allowed to do.

Passwords and fingerprints.

At least 12 characters, mixed types, and unique for each account.

Logging in with two checks, such as a password and a phone code.

To tell humans from bots and block automated attacks.

Scrambling data with a key so only authorised people can read it.

Plaintext is readable data. Ciphertext is the scrambled result of encryption.

A secret value used to encrypt and decrypt data.

Symmetric uses one shared key. Asymmetric uses a public key and a private key.

Use their public key to encrypt; they use their private key to decrypt.

It means only the sender and the receiver can read the messages.