Which of the following is defined as a digitally signed statement used to authenticate and to secure
information on open networks?

A.
Kerberos

B.
Public certificate

C.
Single sign-on (SSO)

D.
SEAL

Explanation:

A public certificate is defined as a digitally signed statement used to authenticate and to secure
information on open networks
Answer C is incorrect. Single sign-on (SSO) is defined as a mechanism
in which a single action of user authentication and authorization is used to allow a user to access all
computers and systems where he got a access permission, without entering passwords for multiple
times.

Answer A is incorrect. Kerberos is defined as a secure method used for authenticating a request for
a service in a computer network.

Answer D 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 softwarebased 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.