Understanding Encryption Concepts

What is symmetric encryption?

• Asymmetric encryption uses the same key for both encrypting and decrypting data.

• Symmetric encryption is a method that only encrypts data without decryption.

• Symmetric encryption requires multiple keys for secure communication.

• Symmetric encryption is a type of encryption that uses the same key for both encrypting and decrypting data.

How does asymmetric encryption differ from symmetric encryption?

• Asymmetric encryption is faster than symmetric encryption for all types of data.

• Asymmetric encryption uses a key pair for encryption and decryption, while symmetric encryption uses a single key.

• Asymmetric encryption uses a single key for both encryption and decryption.

• Symmetric encryption requires a key pair for encryption and decryption.

What is the purpose of a digital signature?

• To verify authenticity and integrity of a message or document.

• To compress the document size for easier sharing.

• To add a watermark to the document for branding purposes.

• To encrypt the message for secure transmission.

Name one common symmetric encryption algorithm.

• AES

• DES

• RSA

• Blowfish

What is the role of a public key in asymmetric encryption?

• The public key encrypts data, allowing secure communication.

• The public key is used to generate random numbers.

• The public key stores user passwords securely.

• The public key decrypts data for secure communication.

Explain the concept of key management in encryption.

• Key management involves the creation of new encryption algorithms.

• Key management is only concerned with the storage of data.

• Key management is the process of deleting old keys without any security measures.

• Key management is the process of handling cryptographic keys securely throughout their lifecycle.

What is the main advantage of using asymmetric encryption?

• Faster data transmission due to smaller key sizes.

• Simplified key management with a single shared key.

• Enhanced security through key pair usage without sharing a secret key.

• Lower computational requirements for encryption and decryption.

How does a digital signature ensure data integrity?

• A digital signature automatically deletes old versions of the data.

• A digital signature encrypts the data to prevent unauthorized access.

• A digital signature compresses the data to save space.

• A digital signature ensures data integrity by allowing verification of the data's authenticity and that it has not been altered.

What is a common use case for symmetric encryption?

• Generating random keys

• Storing passwords securely

• Encrypting data in transit

• Securing data at rest

Describe the process of encrypting a message using a symmetric key.

• Sending the message without any transformation

• The process involves selecting an algorithm, generating a key, converting the message, encrypting it, and encoding the ciphertext.

• Only encoding the message without encryption

• Using a public key to encrypt the message