IGCSE CS Symmetric and Asymmetric Encryption

using the same key to encrypt and decrypt a message

• asymmetric encryption

• symmetric encryption

• plain text

• cipher text

a message before decryption is known as

• cipher text

• encrypted text

• original message

• plain text

a message before encryption is known as

• cipher text

• encrypted text

• original message

• plain text

Using asymmetric encryption, Jeff uses this to send a message to Ali:

• Jeff's public key

• Jeff's private key

• Ali's public key

• Ali's private key

Using asymmetric encryption, Jeff uses this to open a message from Ali:

• Jeff's public key

• Jeff's private key

• Ali's public key

• Ali's private key

This type of encryption makes use of a public and a private key.

• Symmetric Encryption

• Asymmetric Encryption

• Phishing

• Pharming

SSL protocol makes use of encryption

• True

• False

If an encrypted message is hacked, it can easily be read without the key

• True

• False

The part of an asymmetric encryption key freely given to other computers to allow them to encrypt data.

• Public key

• Private key

The part of an asymmetric encryption key that must remain secret. Needed to decrypt data.

• public key

• private key