2.3 · Lesson 2 of 3
Asymmetric encryption
Syllabus 2.3.3
What this lesson covers
- Describe asymmetric encryption with public and private keys
Key vocabulary
- Asymmetric encryption
- Encryption that uses two keys: a public key to encrypt and a private key to decrypt. Also called public key encryption.
- Public key
- The key used to encrypt data. It's created by the receiver and can be shared with anyone.
- Private key
- The key used to decrypt data. It's kept secret by the receiver and never sent.
- Key pair
- A matching public key and private key, created together by the receiver.
- Decryption
- Turning ciphertext back into plaintext using the key.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 5 terms
- Activity 1: Which key? · 8 scenarios
- Activity 2: Asymmetric encryption quiz · 8 questions
- Activity 3: Sending a message with asymmetric keys · drag and drop