Where parties do not have a shared secret and large quantities of sensitive information must be passed, the most efficient means of transferring information is to use Hybrid Encryption Methods. What…

Question

Options

• AUse of public key encryption to secure a secret key, and message encryption using the
• BUse of the recipient's public key for encryption and decryption based on the recipient's
• CUse of software encryption assisted by a hardware encryption accelerator.
• DUse of elliptic curve encryption.

• A
  91% (30)
• C
  6% (2)
• D
  3% (1)

Explanation

Hybrid encryption combines the strengths of both asymmetric and symmetric cryptography. Asymmetric (public key) encryption is computationally expensive, making it impractical for encrypting large data payloads directly. In a hybrid scheme, a random symmetric (secret) key - often called a session key - is generated, used to encrypt the bulk data efficiently, and then that session key itself is encrypted using the recipient's public key. The recipient decrypts the session key with their private key, then uses it to decrypt the data. This gives the key-exchange security of asymmetric cryptography with the speed of symmetric encryption. Option B describes only asymmetric encryption; C and D are unrelated to 'hybrid' methods.

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