GCSE Encryption

What is symmetric encryption?

• Symmetric encryption is a type of encryption where a different key is used for the encryption and decryption processes.

• Symmetric encryption is a type of encryption that only uses numbers as the encryption key.

• Symmetric encryption is a type of encryption that can only be used for text-based data.

• Symmetric encryption is a type of encryption where the same key is used for both the encryption and decryption processes.

What is asymmetric encryption?

• A cryptographic method that uses two different keys, a public key and a private key, to encrypt and decrypt data.

• A cryptographic method that uses the same key to encrypt and decrypt data.

• A method of encryption that does not use any keys.

• A method of encryption that uses a combination of letters and numbers to encrypt data.

What is the main difference between symmetric and asymmetric encryption?

• Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption uses different keys for encryption and decryption.

• Symmetric encryption is faster than asymmetric encryption.

• Symmetric encryption is more secure than asymmetric encryption.

• Symmetric encryption uses different keys for encryption and decryption, while asymmetric encryption uses the same key for both encryption and decryption.

What is public key cryptography?

• A cryptographic system that uses a single key to encrypt and decrypt data.

• A cryptographic system that uses a pair of keys, a public key and a private key, to encrypt and decrypt data.

• A method of encrypting data that does not involve keys.

• A system that uses a public key to encrypt data and a private key to decrypt data, but cannot be used for encryption without the private key.

How does public key cryptography work?

• Using a pair of keys: a public key and a private key

• Using a password for encryption and decryption.

• Using a single key for encryption and decryption.

• Using a symmetric key for encryption and decryption.

What is the purpose of a private key in public key cryptography?

• To encrypt messages with the corresponding public key.

• To authenticate the sender of a message.

• To generate a digital signature for a message.

• To decrypt messages encrypted with the corresponding public key.

What are the advantages of using public key cryptography?

• The advantages of using public key cryptography are slow communication, lack of authentication, difficult key distribution, repudiation, and lack of scalability.

• The advantages of using public key cryptography are insecure communication, lack of authentication, difficult key distribution, repudiation, and lack of scalability.

• The advantages of using public key cryptography are fast communication, lack of authentication, easy key distribution, repudiation, and lack of scalability.

• The advantages of using public key cryptography are secure communication, authentication, key distribution, non-repudiation, and scalability.

What are the disadvantages of using public key cryptography?

• Slower encryption and decryption speeds, higher computational and storage requirements, and the need for a trusted PKI.

• Limited key size options, vulnerability to quantum computing attacks, and potential for key loss or theft.

Which of these are NOT examples of the 4 main network security methods

• Authentication

• IP address filtering

• Encryption

• Firewall

What is encryption?

• The process of converting cyphertext into plaintext

• The process of converting plaintext into ciphertext

• The process of converting plaintext into a human-readable format

• The process of compressing plaintext into a ciphertext