Which is a type of encryption that uses two keys, i.e., a public key and a private key pair for data encryption?

Question

Options

• AAsymmetric encryption
• BSEAL
• CEncrypt command
• DSymmetric encryption

• A
  82% (40)
• B
  10% (5)
• C
  4% (2)
• D
  4% (2)

Explanation

Asymmetric encryption is a type of encryption that uses two keys, i.e., a public key and a private key pair for data encryption. The public key is available to everyone, while the private or secret key is available only to the recipient of the message. For example, when a user sends a message or data to another user, the sender uses the public key to encrypt the data. The receiver uses his private key to decrypt the data. Answer: D is incorrect. Symmetric encryption is a type of encryption that uses a single key to encrypt and decrypt data. Symmetric encryption algorithms are faster than public key encryption. Therefore, it is commonly used when a message sender needs to encrypt a large amount of data. Data Encryption Standard (DES) uses the symmetric encryption key algorithm to encrypt data. Answer: B is incorrect. SEAL is an alternative encryption algorithm to software-based DES, 3DES, and AES. It uses a 160-bit encryption key. SEAL provides less impact to the CPU than other software-based encryption algorithms. In Cisco IOS IPSec implementations, SEAL supports the SEAL algorithm. It can be configured through the command-line interface using the crypto ipsec transform-set command and the esp-seal transform option. Answer: C is incorrect. The encrypt command is used to encrypt files or stdin with a symmetric cipher. The encrypt-l command is used to record and list the algorithms, that are available in Solaris. Those Mechanisms in Solaris, that are listed under a user-level library are available to the encrypt command. For user encryption, the framework provides AES, DES, 3DES (Triple- DES), and ARCFOUR mechanisms.

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