KHOOR was encrypted with a Caesar cipher that shifted every letter 3 places forward. What was the original message?

Encrypt CODE with a Caesar cipher that shifts every letter 3 places forward.

YMNX was made by shifting every letter in an original word 5 places forward. What was the original word?

What ciphertext results when ZOO is encrypted with a Caesar cipher shift of 2 places forward?

UDQJHU was encrypted by shifting every letter 3 places forward. What plaintext does it represent?

A Caesar cipher shifts each letter 4 places forward. How is MATH encrypted?

TUBSU was encrypted with a Caesar cipher that shifted letters 1 place forward. What was the original word?

Encrypt FISH using a Caesar cipher that shifts every letter 7 places forward.

QEB NRFZH was encrypted by shifting every letter 3 places backward. What was the original message?

What is the ciphertext when SAFE is encrypted with a Caesar cipher shift of 1 place forward?

DOG becomes JUM using a Caesar cipher. Using the same key, what does CAT become?

MAP becomes QET using a Caesar cipher. With the same key, what does SUN become?

FROG becomes IURJ using a Caesar cipher. Apply the same key to LION.

BLUE becomes GQZJ using a Caesar cipher. With the same key, what does PINK become?

Bob posts his public key online. Mei wants to encrypt a report so that only Bob can read it. Which key should Mei use?

A message was encrypted with Nia's public key. Which key can decrypt that message?

Francisco publishes a public key, and Kira uses it to lock a message for him. An attacker later steals Francisco's private key. What can the attacker now do?

Sam adds a digital signature to a contract so recipients can check that Sam signed it. Which key does Sam use to create the signature?

Ava receives a file carrying a digital signature made with Leo's private key. Which key lets Ava verify the signature?

A store posts its public key on its website so customers can send it encrypted orders. Why is it safe for anyone to see this key?

In HTTPS, a browser and a website use public-key methods to agree on a shared secret key. Which kind of encryption then protects the rest of the data they send?

Members of a band use one shared secret key to encrypt and decrypt a concert draft. What system are they using?

Mina publishes one key for anyone to use and keeps its matching key secret. What type of encryption system is this?

A school encrypts internal files with one shared secret key. Families encrypt messages to the school using its published key. Which systems are used, in order?

Which statement correctly compares symmetric and public-key encryption?

Which arrangement is an example of symmetric encryption?

When a user signs in, a site applies the same one-way function to the typed password and compares its result with a stored result. What is the site doing?

A program converts binary data to Base64 so it can be included in a text-only message, and any program can reverse the conversion. What process is this?

When Casey sends a form over HTTPS, the browser changes the form data into ciphertext so an interceptor cannot read its contents. What protection is being used?

A site requires a password and a one-time code before it grants access to an account. What is the main purpose of this check?