Data Encryption Techniques NDE Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A remote workforce needs to securely access internal applications over the internet. The company wants to ensure that all traffic between employees' laptops and the corporate network is encrypted. Which technology should be deployed?

   • AA VPN using IPsec or TLS.
   • BSSL/TLS on the internal web servers only.
   • CA firewall with deep packet inspection.
   • DFull-disk encryption on the laptops.
   Reveal Solution Discussion Select an answer first
2. 27application · medium

   A database administrator must encrypt a column of customer records in a relational database. The column contains fixed-length 128-bit values. The requirement is that identical plaintext values must not produce identical ciphertext, to prevent an attacker from inferring patterns. Which block cipher mode of operation should the administrator choose?

   • ACBC (Cipher Block Chaining) with a random IV
   • BCTR (Counter) with a fixed nonce
   • CGCM (Galois/Counter Mode) without an IV
   • DECB (Electronic Codebook)
   Reveal Solution Discussion Select an answer first
4. 28expert · hard

   A company is deploying a new web application that will handle sensitive customer data. The application will be accessed over the internet. The security team wants to ensure that data is encrypted in transit and that the server's identity is authenticated to the client. Which technology should be implemented?

   • AFull-disk encryption on the server.
   • BA VPN between the client and the server.
   • CTLS with a certificate signed by a trusted CA.
   • DA digital signature on each HTTP response.
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   How does a stream cipher encrypt data?

   • AIt uses a public key to encrypt each bit.
   • BIt requires padding to handle partial blocks.
   • CIt encrypts data bit-by-bit or byte-by-byte.
   • DIt encrypts data in fixed-size blocks.
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   Which statement best describes how symmetric encryption works?

   • AIt uses a key derived from the data being encrypted.
   • BIt uses a single shared key for both encryption and decryption.
   • CIt uses a public key to encrypt and a private key to decrypt.
   • DIt uses a different key for each block of data.
   Reveal Solution Discussion Select an answer first