What are the five principle services provided by PGP?

PGP – Authentication and Confidentiality

• PGP – Authentication and Confidentiality.
• RC4 Encryption Algorithm.
• Data Compression With Arithmetic Coding.
• LZW (Lempel–Ziv–Welch) Compression technique.
• Shannon-Fano Algorithm for Data Compression.
• RC5 Encryption Algorithm.
• Playfair Cipher with Examples.
• Hill Cipher.

How many services are provided by PGP?

PGP offers five basic services. Two of those are authentication and confidentiality; these can be combined.

What are PGP functions?

Pretty Good Privacy (PGP) is an encryption system used for both sending encrypted emails and encrypting sensitive files. Since its invention back in 1991, PGP has become the de facto standard for email security.

What are the services provided by IPSec?

Three security services that can be provided by IPSec are: message confidentiality, message integrity and traffic analysis protection. Briefly explain the type of mechanism used to provide each of these services. c. Briefly describe the three major VPN architectures supported by IPSec.

What is S mime used for?

S/MIME (Secure/Multipurpose internet Mail Extensions) is a widely accepted protocol for sending digitally signed and encrypted messages. S/MIME in Exchange Online provides the following services for email messages: Encryption: Protects the content of email messages.

What is S mime Geeksforgeeks?

S/MIME is a security-enhanced version of Multipurpose Internet Mail Extension (MIME). In this, public key cryptography is used for digital sign, encrypt or decrypt the email. User acquires a public-private key pair with a trusted authority and then makes appropriate use of those keys with email applications.

What are the services provided by IP security?

What is PGP format?

A PGP file is a security key or digital signature that verifies a user’s identity. It is used to decrypt a file encrypted by Pretty Good Privacy software. When encrypting and decrypting files, Pretty Good Privacy uses a variety of public and private security keys. Private keys are saved in PGP files.

Which compression algorithm is used in PGP?

The compression algorithm used is called ZIP which is described in the recommended text. Many electronic mail systems only permit the use of blocks consisting of ASCII text. When PGP is used, at least part of the block to be transmitted is encrypted.

Which Internet protocol provides the security layer?

The Transport Layer Security (TLS) protocol adds a layer of security on top of the TCP/IP transport protocols. TLS uses both symmetric encryption and public key encryption for securely sending private data, and adds additional security features, such as authentication and message tampering detection.

What services are provided by IPsec Give difference between transport mode and tunnel mode?

In transport mode, the IP addresses in the outer header are used to determine the IPsec policy that will be applied to the packet. In tunnel mode, two IP headers are sent. The inner IP packet determines the IPsec policy that protects its contents.