Exploring Cryptography Concepts

What is symmetric key cryptography?

• Symmetric key cryptography uses the same key for encryption and decryption.

• It requires a public key for encryption.

• It is only used for digital signatures.

• It uses different keys for encryption and decryption.

How does asymmetric key cryptography differ from symmetric key cryptography?

• Asymmetric key cryptography is only used for data encryption, while symmetric key cryptography is used for both encryption and decryption.

• Asymmetric key cryptography uses a single key, while symmetric key cryptography uses two keys.

• Symmetric key cryptography is slower than asymmetric key cryptography.

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

What role do hash functions play in data integrity?

• Hash functions encrypt data to enhance security.

• Hash functions are used to compress data for storage.

• Hash functions create backups of data automatically.

• Hash functions ensure data integrity by providing a unique fingerprint for data, allowing detection of any alterations.

Explain the purpose of digital signatures in secure communications.

• Digital signatures are used to encrypt messages only.

• Digital signatures are primarily for aesthetic purposes in documents.

• Digital signatures are a form of digital watermarking.

• Digital signatures ensure authenticity, integrity, and non-repudiation in secure communications.

What is cryptanalysis and how is it used in cryptography?

• Cryptanalysis is a method for creating new encryption algorithms.

• Cryptanalysis is the process of encrypting messages to secure them.

• Cryptanalysis is the study of breaking cryptographic systems and is used to evaluate and strengthen encryption methods.

• Cryptanalysis is the study of computer viruses and malware.

What role do certificate authorities play in the realm of online security?

• Certificate authorities are responsible for issuing software licenses.

• Certificate authorities are involved in the creation of user accounts.

• Certificate authorities validate the identities of entities and provide digital certificates that enable secure online communications.

• Certificate authorities manage the distribution of physical security tokens.

Describe the importance of key management in cryptographic systems.

• Ensures the encryption algorithms remain secure

• Manages the secure generation, distribution, storage, and destruction of cryptographic keys

• Determines the strength of the cryptographic algorithms.

• Provides user authentication for the system

What are cryptoprocessors and how do they enhance security?

• Cryptoprocessors enhance security by increasing the processing speed of regular CPUs.

• Cryptoprocessors are specialized hardware that enhance security by securely managing cryptographic keys and operations, isolating sensitive data from the main system.

• Cryptoprocessors are software applications that run on standard operating systems.

• Cryptoprocessors are used primarily for data storage without any security features.

What is a secure enclave and how does it protect sensitive data?

• An encrypted storage solution for securely saving sensitive files on a network.

• A software-based firewall that blocks unauthorized access to data

• A virtual machine that runs encrypted applications to protect data

• A secure enclave is a hardware-based isolated environment that protects sensitive data by encrypting it and restricting access to authorized applications only.

How does file encryption differ from disk encryption?

• File encryption is faster than disk encryption.

• Disk encryption only protects files in use.

• File encryption is used for system boot processes.

• File encryption secures individual files; disk encryption secures the entire storage device.