True or False? A keyword mixed alphabet cipher uses a cipher alphabet that consists of a keyword, minus duplicates, followed by the remaining letters of the alphabet.

Group of answer choices

True

False

Flag question: Question $18$

Question $184$ pts

What is the only unbreakable cipher when it is used properly?

Group of answer choices

Rivest$$Shamir$$Adelman $($RSA$)$

Vernam

Elliptic Curve Diffie$$Hellman Ephemeral $($ECDHE$)$

Blowfish

Flag question: Question $19$

Question $194$ pts

Alice would like to send a message to Bob using a digital signature. What cryptographic key does Alice use to create the digital signature?

Group of answer choices

Alice's public key

Alice's private key

Bob's public key

Bob's private key

Flag question: Question $20$

Question $204$ pts

True or False? A product cipher is an encryption algorithm that has no corresponding decryption algorithm.

Group of answer choices

True

False