INFORMATION NETWORK AND SECURITY - PART 2
Q. Write a short note on Kerberos.
A. Kerberos provides a centralized authentication server whose function is to
authenticate users to servers and servers to users. In Kerberos Authentication
server and database is used for client authentication. Kerberos runs as a third-
party trusted server known as the Key Distribution Center (KDC). Each user and
service on the network is a principal. The main components of Kerberos are:
Authentication Server (AS)
Database
Ticket Granting Server (TGS)
Q. Explain the concept of Digital Certificate in detail.
A. A digital certificate, also known as a public key certificate, is used to
cryptographically link ownership of a public key with the entity that owns it.
Digital certificates are for sharing public keys to be used for encryption and
authentication.
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, Digital certificates include the public key being certified, identifying information
about the entity that owns the public key, metadata relating to the digital
certificate and a digital signature of the public key the certificate issuer created.
Q. Explain PGP with different services offered by it.
A. PGP stands for Pretty Good Privacy (PGP) which is invented by Phil
Zimmermann. PGP was designed to provide all four aspects of security, i.e.,
privacy, integrity, authentication, and non-repudiation in the sending of email.
PGP is an open source and freely available software package for email security.
PGP provides authentication through the use of Digital Signature.
It provides confidentiality through the use of symmetric block encryption.
It provides compression by using the ZIP algorithm, and EMAIL compatibility using
the radix-64 encoding scheme.
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Q. Write a short note on Kerberos.
A. Kerberos provides a centralized authentication server whose function is to
authenticate users to servers and servers to users. In Kerberos Authentication
server and database is used for client authentication. Kerberos runs as a third-
party trusted server known as the Key Distribution Center (KDC). Each user and
service on the network is a principal. The main components of Kerberos are:
Authentication Server (AS)
Database
Ticket Granting Server (TGS)
Q. Explain the concept of Digital Certificate in detail.
A. A digital certificate, also known as a public key certificate, is used to
cryptographically link ownership of a public key with the entity that owns it.
Digital certificates are for sharing public keys to be used for encryption and
authentication.
1
, Digital certificates include the public key being certified, identifying information
about the entity that owns the public key, metadata relating to the digital
certificate and a digital signature of the public key the certificate issuer created.
Q. Explain PGP with different services offered by it.
A. PGP stands for Pretty Good Privacy (PGP) which is invented by Phil
Zimmermann. PGP was designed to provide all four aspects of security, i.e.,
privacy, integrity, authentication, and non-repudiation in the sending of email.
PGP is an open source and freely available software package for email security.
PGP provides authentication through the use of Digital Signature.
It provides confidentiality through the use of symmetric block encryption.
It provides compression by using the ZIP algorithm, and EMAIL compatibility using
the radix-64 encoding scheme.
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