The following are the services offered by PGP: 1. Authentication 2. Confidentiality 3. Compression 4. Email Compatibility 5.
Full Answer
What are the two principal services provided by PGP?
Regardless of that, PGP provides encryption and authentication, those are the two and only principal services. Encryption can be symm... > What are the five principal services provided by PGP? Not sure why you would want five services. This question has the smell of a homework assignment.
What is PGP and how does it work?
Regardless of that, PGP provides encryption and authentication, those are the two and only principal services. Encryption can be symmetric and asymmetric and authentication will include secure hashing, key exchange and identification among the communicating parties.
What is confidentiality in PGP?
Confidentiality − It is a service supported by PGP is confidentiality which is provided by encrypting messages to be transmitted or to be saved locally as files. In some cases, the user has a best of CAST-128, IDEA or 3DES in 64 bit cipher feedback (CFB) mode.
Which are the five principal services provided by PGP?
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.
How many services are provided by PGP?
PGP offers five basic services.
What are the four PGP services?
It provides Authentication through the use of digital signature, • The confidentiality through the use of symmetric block encryption, • Compression using the ZIP algorithm, and • E-Mail compatibility using the radix-64 encoding scheme. 3. PGP has grown very quickly and is now widely used.
How does PGP provide authentication and confidentiality?
PGP achieves confidentiality and authentication by the following steps:The sender creates a message M.SHA-1 is used to generate a 160-bit hash code of the message.The hash code is then encrypted with RSA using sender's private key.The result is concatenated with the original message.More items...
What is PGP used for?
Pretty Good Privacy Definition. Pretty Good Privacy (PGP) is a security program used to decrypt and encrypt email and authenticate email messages through digital signatures and file encryption. PGP was first designed and developed in 1991 by Paul Zimmerman, a political activist.
What are the different types of encryption algorithm PGP supports?
At a basic level, PGP encryption uses a combination of two forms of encryption: symmetric key encryption, and public-key encryption.
What is a PGP and describe the role in application layer?
Pretty Good Privacy (PGP) is an e-mail encryption scheme. It has become the de-facto standard for providing security services for e-mail communication. As discussed above, it uses public key cryptography, symmetric key cryptography, hash function, and digital signature. It provides − Privacy.
How does PGP provide security in email transmission?
To do this, PGP combines private-key and public-key encryption. The sender encrypts the message using a public encryption algorithm provided by the receiver. The receiver provides their personal public-key to whomever they would like to receive messages from. This is done to protect the message during transmission.
What are the three classes of intruders?
Intruders are of three types, namely, masquerader, misfeasor and clandestine user.
How does PGP verification work?
Verifying PGP signatures allows us to verify that the file or message came from a trusted source, since it has been signed with the author's private key. The private key is something that only the author alone should have access to. In order to verify it's authentic, we would only need the signer's public key.
What is PGP quizlet?
Pretty Good Privacy (PGP) widely used de facto secure email.
What is segmentation in PGP?
Pretty Good Privacy (PGP) To accommodate this restriction, PGP automatically subdivides a message that is too large into segments that are small enough to sent via e-mail. The segmentation is done after all the other processing, including the radix-64 conversion.