Gnu Privacy Guard (GPG) is

Question

Question

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Kerala Police SI 2015 Official Paper

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An intrusion detection system
A cryptographic protocol providing communications security over the internet
A firewall
A cryptographic software which provides for key-based asymmetric cryptography for encryption and authentication

Answer 1

The Correct answer is A cryptographic software which provides for key-based asymmetric cryptography for encryption and authentication.

Key Points

Gnu Privacy Guard (GPG):
- The GNU Privacy Guard is an encryption tool that allows easy access to certain symmetric and asymmetric functions.
- It can be used primarily for encryption of documents and email.
- GPG implements the Pretty Good Privacy (PGP) protocol.
- For asymmetric encryption, each individual has a publicly known encryption key and a private key known only to them. One encrypts a message to send to someone else using their public key, who then decrypts it using their private key.

Additional Information

PGP Protocol:
- It stands for Pretty Good Privacy Protocol.
- It was invented by Phil Zimmermann.
- It is the encryption method used for secure and meaningful communication.
- PGP was designed to provide all four aspects of security, i.e., privacy, integrity, authentication, and non-repudiation in the sending of email.
- PGP uses a digital signature (a combination of hashing and public key encryption) to provide integrity, authentication, and non-repudiation.
- PGP is an open source and freely available software package for email security.