Plaintext and encrypted messages The difference between digitally signed messages

Plaintext delivery refers to the ordinary way of transmitting email content, which is basically the original data sent and received, and the content can be seen directly without any processing after receipt; Encrypted email means that the content you send is encrypted and calculated, and then the recipient needs the same encryption method to decrypt the content before the content can be read. Digital signatures.

It just means that the email was sent by your computer, which is equivalent to a signature, but electronically.

Summary. This description can be used to describe a public key infrastructure (PKI) system. PKI is a security framework used to secure network communications and data transmission.

It includes security mechanisms such as digital certificates, digital signatures, and encryption technologies to ensure the confidentiality, integrity, and authentication of data. A digital signature is a digital proof that verifies the authenticity and integrity of a document or message. The document is signed with a private key, and then the public key is distributed to the person who needs to verify the document.

This way, the receiver can use the public key to verify that the document has not been tampered with. Encryption technology is used to convert data into an unreadable form so that only authorized users can access it. The sender encrypts the data with the receiver's public key, while the receiver uses its private key to decrypt it.

Therefore, PKI systems that support digital signatures and encryption functions can be used to protect the confidentiality, integrity, and authentication of messages and documents.

What supports both digital signature and signature verification of messages and can also be used to encrypt files.

This description can be used to describe the Public Key Infrastructure (PKI) system. PKI is a security framework used to secure network communications and data transmission. It includes security mechanisms such as digital certificates, digital signatures, and encryption technologies to ensure the confidentiality, integrity, and authentication of data.

A digital signature is a digital proof that verifies the authenticity and integrity of a document or message. The document is signed with a private key, and then the public key is distributed to the person who needs to verify the document. This way, the receiver can use the public key to verify that the document has not been tampered with.

Cryptography is used to convert data into an unreadable form so that only authorized users can access it. The sender encrypts the data with the receiver's public key, while the receiver uses its private key to decrypt it. Therefore, PKI systems that support digital signatures and encryption functions can be used to protect the confidentiality, integrity, and authentication of messages and documents.

Can you add, I don't quite understand it.

A PKI system typically consists of the following components:1Digital Certificates:

Electronic stumbling files used to verify identities and encrypt communications. 2.Public and private key branches:

Used for digital signatures, encryption, and decryption. 3.Certificate Authority (CA):

Responsible for issuing digital certificates and verifying their validity. 4.Certificate Revocation List (CRL):

Contains information about digital certificates that have become invalid so that other users can no longer trust them. By using the PKI system, users can digitally sign and verify the signature of the email to ensure that the content of the email has not been tampered with and that the identity of the sender is verified. At the same time, the PKI system can also be used to encrypt files and protect the content of files from being stolen or tampered with during transmission.

When the receiver receives an encrypted file, only the person with the correct private key can decrypt the file. It should be noted that using the PKI system requires certain technical knowledge and operating procedures. If you need to use the PKI system, please learn the relevant knowledge or ask a professional to help you operate it.