Cryptography: CIA Services

In cryptographic services, what primary security goals are achieved through authentication, integrity checks, and ensuring confidentiality?

How does hashing contribute to data integrity in cryptographic systems?

What is the purpose of using asymmetric keys for authentication?

What is the main challenge in key exchange that Diffie-Hellman and similar algorithms aim to solve?

Which of the following is a core component of the CIA triad, focusing on preventing unauthorized disclosure of information?

In symmetric encryption, what key management issue is most prominent?

Which security goal is primarily achieved through the use of digital certificates?

How does a Certificate Authority (CA) contribute to the Public Key Infrastructure (PKI)?

What is the purpose of a Registration Authority (RA) in the context of digital certificates?

Which of the following best describes the difference between symmetric and asymmetric encryption?

Which algorithm is considered 'most secure' for integrity?

Which key length is associated with the DES encryption algorithm?

In public key cryptography, what is the purpose of encrypting a message with the recipient's public key?

Confidentiality with symmetric key is achieved with?

What is the purpose of the keyed-hash message authentication code?

What is a digital certificate mainly used for?

Which of the following properties are associated with Digital Signatures?

Between PSK and RSA, which peer authentification method is considered 'Most Secure'?

A certificate authority (CA) has the ability to sign certificates. What is this proving?

In symmetric encryption, the same key is used for both encryption and decryption.

Asymmetric encryption, such as RSA, utilizes the same key for encryption and decryption, simplifying key management.

Authentication provides assurance that data has not been altered in transit.

Integrity ensures the confidentiality of data but does not confirm the sender's identity.

Confidentiality is achieved through hashing algorithms, which scramble the data.

Key exchange protocols are not necessary if both parties already possess pre-shared keys.

Public key cryptography relies on distributing the private key to ensure secure communication.

In a VPN, encryption is only applied to the header of the data packet, leaving the payload unencrypted for faster processing.

Hashing algorithms are reversible, allowing the original data to be recovered from the hash value.

Digital signatures provide integrity, authentication, and non-repudiation for digital communications.

A certificate authority (CA) is responsible for issuing digital certificates to verify the identity of individuals and organizations.

Digital certificates are valid indefinitely and do not require renewal.

The MD5 algorithm produces a 256-bit hash value, making it more secure than SHA-1.

HMAC (Keyed-Hash Message Authentication Code) uses a cryptographic key to provide both integrity and authentication of a message.

In the context of cryptography, non-repudiation means that the sender of a message can deny having sent it.

Diffie-Hellman is a symmetric encryption algorithm used to securely exchange keys over a public channel.

Assuming Alice wants to send an encrypted message to Bob using asymmetric encryption, she would encrypt the message with her private key and Bob would decrypt it using Alice's public key.

The main goal of cryptography is to ensure availability of data, even if it implies sacrificing confidentiality or integrity.

PSK (Pre-Shared Key) is considered a more secure peer authentication method than RSA due to its complex key generation process.

A registration authority (RA) directly issues certificates to end-users, bypassing the need for a certificate authority (CA).