Exploring Cryptography Concepts

What is the primary purpose of cryptography?

• To secure communication and protect information.

• To enhance data storage efficiency.

• To create complex algorithms for data analysis.

• To facilitate faster internet connections.

What is asymmetric encryption and how does it differ from symmetric encryption?

• Asymmetric encryption uses a single shared key, while symmetric encryption uses a key pair.

• Symmetric encryption requires two different keys for encryption and decryption.

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

• Asymmetric encryption uses a key pair (public and private), while symmetric encryption uses a single shared key.

Explain the concept of a cryptographic hash function.

• A cryptographic hash function is a one-way function that converts input data into a fixed-size string, ensuring data integrity and security.

• A cryptographic hash function generates random strings without any relation to the input data.

• A cryptographic hash function is a reversible function that allows data to be decrypted.

• A cryptographic hash function is used to encrypt data for secure transmission.

What role do keys play in cryptography?

• Keys are primarily used for user authentication.

• Keys are used to store data securely in databases.

• Keys are only relevant in symmetric encryption.

• Keys are used to encrypt and decrypt data in cryptography.

Describe the process of digital signatures.

• Digital signatures are created by scanning a document and sending it via email.

• Digital signatures are made by printing a document and signing it with a pen.

• Digital signatures are generated by copying a document and pasting it into a digital format.

• Digital signatures are created by hashing a document and encrypting the hash with a private key, allowing verification with a public key.

What is the significance of the RSA algorithm in cryptography?

• The RSA algorithm provides secure data transmission through public-key cryptography.

• RSA is primarily used for symmetric key encryption.

• The RSA algorithm is only applicable to digital signatures.

• RSA is a type of hashing algorithm.

What is a certificate authority (CA) and its function?

• A CA is a hardware device that stores passwords securely.

• A certificate authority (CA) is a trusted entity that issues digital certificates to verify identities and secure communications.

• A CA is a software application that encrypts data on a server.

• A CA is a type of firewall that blocks unauthorized access.

Explain the concept of public key infrastructure (PKI).

• A method for managing physical keys in a secure facility.

• A framework for managing user passwords and access control.

• Public Key Infrastructure (PKI) is a system that manages digital certificates and public-key encryption to secure communications.

• A type of software used for data backup and recovery.

What are the main types of cryptographic attacks?

• Brute Force, Ciphertext-only, Known-plaintext, Chosen-plaintext, Side-channel, Man-in-the-Middle

• Digital Signature, Certificate

• Hashing, Salting

• Public Key, Private Key

Define the term 'ciphertext'.

• Ciphertext is a type of encryption key.

• Ciphertext is the original plaintext message.

• Ciphertext is the encrypted output of a cryptographic algorithm.

• Ciphertext is the process of decrypting data.