Cryptography

A security team is implementing a PKI for a large enterprise. Which TWO of the following are commonly used methods for certificate revocation checking? (Select TWO.)

A company is deploying a VPN using IPsec. They want to ensure that even if the private key of the server is compromised, past session keys cannot be derived. Which key exchange method should they use?

An organization is migrating from 3DES to AES-256 for encrypting data at rest. Which mode of AES is recommended for authenticated encryption?

Which of the following protocols is used to securely transfer files over SSH and is considered a replacement for FTP?

An organization is implementing a digital signature solution to ensure non-repudiation of documents. Which combination of keys is used during the signing process?

A certificate authority (CA) issues a certificate with the extended key usage (EKU) extension specifying 'serverAuth'. Which of the following is this certificate allowed to do?

An organization wants to implement a key exchange mechanism that provides forward secrecy. Which of the following should be used?

An organization is configuring a VPN using IPsec. To ensure forward secrecy, which key exchange method should be used?

Which of the following is a method to check the revocation status of a digital certificate in real-time without the client downloading a full list?

A company is migrating from 3DES to a modern encryption algorithm. Which of the following are acceptable choices? (Select TWO)

Which of the following best describes the difference between HMAC and a simple hash function like SHA-256 when used for message authentication?

A company is implementing a PKI for internal use. What is the primary purpose of a Certificate Revocation List (CRL)?

An organization is moving away from legacy encryption and wants to avoid stream ciphers due to known vulnerabilities. Which of the following algorithms should be avoided because it is a stream cipher with known weaknesses like the BEAST attack?

A security analyst is evaluating the cryptographic settings for a new application that requires both confidentiality and integrity for data in transit. The analyst needs to choose a symmetric cipher that provides authenticated encryption. Which of the following is the best choice?

In X.509 certificate format, which field is used to specify the fully qualified domain name(s) for which the certificate is valid?

An organization is designing a secure email system using S/MIME. Which of the following are essential components of the PKI that must be in place? (Select THREE)

A security analyst is reviewing a digital signature implementation. The signer uses their private key to encrypt the hash of a message. What does the recipient use to verify the signature?

A security auditor reviews a system that uses HMAC-SHA256 for message authentication. Which property does HMAC provide that a simple hash of the message does not?

Which of the following best describes the purpose of a Hardware Security Module (HSM) in key management?

Which of the following hash algorithms is considered cryptographically broken and should be avoided due to collision attacks?

A security engineer needs to choose an asymmetric algorithm for a system with limited computational resources, such as an IoT device. The algorithm must provide equivalent security to RSA 2048-bit while using smaller key sizes. Which algorithm should they choose?

A security administrator is setting up a public key infrastructure (PKI) for internal use. Which two of the following components are essential for establishing a chain of trust from the root CA to end-entity certificates?

A PKI administrator needs to check the revocation status of a digital certificate without requiring the client to download the entire CRL. Which method is designed for online, real-time certificate status checking?

A company wants to implement a key management system. They need to generate cryptographic keys that are unpredictable. Which source of randomness should be used?

A security analyst is evaluating encryption modes for a new system that requires authenticated encryption to ensure both confidentiality and integrity of data in transit. Which AES mode should the analyst recommend?

Which of the following is a secure hash algorithm currently recommended by NIST?

A security engineer is designing a key management system for a large enterprise. Which two of the following practices are essential for securing cryptographic keys throughout their lifecycle?

A company is upgrading its legacy systems to use modern cryptographic standards. Which two of the following algorithms should be avoided due to known weaknesses or deprecation?

Which of the following is a secure protocol for remote administration of a server, replacing insecure protocols like Telnet?

Which TWO of the following are considered secure cryptographic hash functions as of current standards? (Select TWO.)

A company is selecting a cryptographic algorithm for digital signatures. Which THREE of the following algorithms can be used for digital signatures? (Select THREE.)

A security administrator is configuring a web server to use TLS. They want to optimize performance while maintaining strong security. Which cipher suite should they prioritize?

A security professional is designing a key management system and needs to ensure that keys are generated using a truly random source. Which of the following is the most appropriate method for generating cryptographic keys?

An organization is implementing a digital signature solution to ensure non-repudiation and integrity of documents. Which three of the following are true regarding digital signatures?

An organization uses a PKI with a root CA that issues certificates to intermediate CAs, which then issue end-entity certificates. A client receives an end-entity certificate signed by an intermediate CA. During validation, which certificates are required to build the chain of trust?

A security analyst is recommending a symmetric encryption algorithm for a new application that requires both confidentiality and authentication. Which algorithm and mode combination should they select?