Spot the false claim

Exercise and reference answers

Questions

1. False statement

   A hash can be reversed by key

   Statements

   1. Plaintext is not encrypted
   2. Encryption gives confidentiality
   3. A hash can be reversed by key

2. False statement

   A MAC proves who signed to others

   Statements

   1. A MAC needs a shared key
   2. A MAC proves who signed to others
   3. A MAC spots accidental edits

3. False statement

   The private key is published

   Statements

   1. A key pair has two keys
   2. The private key signs
   3. The private key is published

Instructions

Two claims are true and one is false. Tap the false one.

Explanation