CN109756331B

CN109756331B - Mail communication method for realizing decentralized distributed encryption based on mail server

Info

Publication number: CN109756331B
Application number: CN201910113220.8A
Authority: CN
Inventors: 唐伯春
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-13
Filing date: 2019-02-13
Publication date: 2021-11-12
Anticipated expiration: 2039-02-13
Also published as: CN109756331A

Abstract

The invention discloses a mail communication method for realizing decentralized distributed encryption based on a mail server, which comprises the steps that a set user comprises a receiver user and a sender user, a plurality of mailbox addresses filled by the user are received, and the mailboxes are stored in a registration server; if an instruction for registering or changing mailbox configuration by a user is received, corresponding operation is carried out; regularly sending mailbox configurations of a receiver user and a sender user in a registration server to an opposite mailbox; generating a key pair between a receiver user and a sender user, and exchanging keys; dividing the information to be sent according to the number of the mailboxes of the receiver user, and sending the information to a plurality of mailboxes of the receiver user; the information that is split and sent to several mailboxes is merged and decrypted according to the exchanged key to obtain plaintext information. The invention ensures that the communication is more convenient and efficient, ensures the information safety and ensures the privacy safety of users.

Description

Mail communication method for realizing decentralized distributed encryption based on mail server

Technical Field

The invention relates to the technical field of instant messaging, in particular to a mail communication method for realizing decentralized distributed encryption based on a mail server.

Background

In a traditional instant messaging mode, data exchange is generally carried out by adopting one server, and sent or received information is not divided, so that the information is easy to steal, and the security cannot be guaranteed.

The traditional distributed information transmission method has high cost and needs regular maintenance and updating, and the distributed transmission is performed through a plurality of servers, so that the transmission efficiency is low, and the instant communication cannot be realized; and the encryption process is complicated, which not only affects the information transmission speed, but also cannot ensure the information security.

Disclosure of Invention

Therefore, in order to solve the above problems, it is necessary to provide a mail communication method for implementing decentralized distributed encryption based on a mail server, which is convenient and efficient in communication and ensures information security.

The technical scheme of the invention is as follows:

a mail communication method for realizing decentralized distributed encryption based on a mail server sets users capable of registering a mailbox to comprise a receiver user and a sender user, and comprises the following steps:

a. receiving a plurality of mailbox addresses filled by a user, and storing the mailboxes into a registration server;

b. after a plurality of mailbox addresses filled by a user are stored in a registration server, if an instruction of registering or changing mailbox configuration by the user is received, corresponding operation is carried out;

c. regularly sending mailbox configurations of a receiver user and a sender user in a registration server to an opposite mailbox;

d. generating a key pair between a receiver user and a sender user, and exchanging keys;

e. dividing the information to be sent according to the number of the mailboxes of the receiver users, and sending the divided information to a plurality of mailboxes of the receiver users according to the mailboxes of the sender users;

f. the information that is split and sent to several mailboxes is merged and decrypted according to the exchanged key to obtain plaintext information.

In the technical scheme, the information to be sent is divided into a plurality of mailboxes through a plurality of mailbox addresses registered by the user, distributed communication of the information is achieved, the receiver user obtains the plaintext through the asymmetric encryption algorithm and the symmetric encryption algorithm, the communication safety is improved, the mailbox addresses of the user are adopted, the maintenance and use cost is reduced, and the communication efficiency is improved.

Preferably, the step a comprises the following steps:

a101, defining a registered mailbox group, and sending a test mail to each registered mailbox in the registered mailbox group after receiving a plurality of mailbox addresses filled by a user;

a102, judging whether a mail replied by a registration mailbox is received within a specified time, if so, marking the registration mailbox as an available registration mailbox; if not, not marking;

a103, determining the priority of available register mailboxes according to the time sequence of receiving the mails replied by the register mailboxes;

and a104, storing a plurality of mailboxes filled by the user into the registration server through available registration mailboxes.

And testing a plurality of mailboxes registered by the user, and confirming the mailbox with high feedback speed as the preferred mailbox, so that the validity of information transmission can be ensured.

Preferably, the step b comprises the following steps:

b101, generating an asymmetric key pair when receiving a registration request mail with user ID information sent to a registration server;

b102, sending the public key of the key pair to an available mailbox of a relevant user;

b103, packaging the registration information of the user, and encrypting and sending the registration information to a registration server based on a public key;

and b104, after the encrypted registration information is obtained, decrypting based on a private key related to the user ID information to finish registration.

The user registration is finished in an asymmetric encryption mode, so that the safety of user information is ensured; and a plurality of mailbox addresses registered by the users are all stored in the registration server, at the moment, registered mailboxes of different users are recorded in the registration server, so that the mailbox address groups of the users of the other side are acquired by the registration server among the communication users when the users communicate with each other, and further, the information is conveniently split and transmitted.

Preferably, the step b further comprises the following steps:

b201, if receiving a mailbox update request mail initiated by a user to a registration server, generating an asymmetric key pair;

b202, sending the public key of the key pair to an available mailbox of a relevant user;

b203, packing the mailbox configuration changed by the user, and encrypting and sending the mailbox configuration to a registration server based on a public key;

and b204, after the encrypted mailbox configuration is received, decrypting based on a private key related to the user ID information, and recording and storing.

If the mailbox configuration needs to be changed (mailbox is increased, decreased or deleted) after the user registration is finished, updating is also carried out in the registration server, and the synchronization of the user registration information is realized.

Preferably, the method further comprises the following steps:

receiving a test mail sent to a self mailbox by a sender user through different SMTP servers;

the server which completes the SMTP mail transmission most quickly is defined as a priority SMTP server.

And the sending rate is tested, and a preferred SMTP server is defined, so that the efficiency of information communication between users is higher, and the response rate is ensured.

Preferably, the step d comprises the following steps:

d101, generating an asymmetric key pair based on the receiver user, and sending the mail containing the public key to one mailbox of the receiver user through a preferred SMTP server;

d102, after receiving the mail containing the public key, the receiver user generates a symmetric encrypted key, and signs and encrypts the symmetric encrypted key through the acquired public key;

d103, sending the encrypted symmetric encrypted key to the sender user;

and d104, after receiving the encrypted symmetric encrypted key, the sender user decrypts the key through a private key to obtain the symmetric encrypted key.

In the technical scheme, the exchange of the symmetric key is carried out between the communication users, and the specific flow is as follows:

1. the user A generates a specific asymmetric key pair of the user B and generates a public key mail to the user B;

2. user A sends the key mail to one of user B's mailboxes through the fastest SMTP mail server;

3. after receiving the public key, the user B uses the public key to sign and encrypt the generated symmetric encrypted secret key;

4. the user B sends the mail to the user A;

5. after receiving the mail, the user A uses a private key to solve the symmetrically encrypted key information obtained by the information interface;

through the above mode, the exchange of the symmetric keys of the user A and the user B is realized, and the guarantee is provided for the information instant messaging.

Preferably, the step e comprises the following steps:

e101, encrypting the information to be sent based on the symmetric encryption key acquired by the sender user;

e102, dividing the information to be sent according to the number of the mailboxes of the receiver users;

e103, the divided information is sent to a plurality of mailboxes of the receiving users through the prior SMTP server.

The information to be sent is segmented, fragmentation processing of the information is achieved, information is prevented from being stolen, and privacy safety among communication users is protected.

Preferably, the step f comprises the following steps:

f101, after receiving the divided information, merging the information;

and f102, decrypting the information based on the symmetric encryption key to obtain plaintext information.

After the information is divided and transmitted to the mailboxes, the information divided in each mailbox is subjected to labeling processing, so that a receiver user can conveniently combine the divided information, and then the information is decrypted according to the exchanged symmetric key, so that distributed instant messaging is realized, the information safety is ensured, the communication efficiency and the response rate are improved, communication can be carried out between communication users in real time or at any time, and information leakage or packet drop is avoided.

The invention has the beneficial effects that:

the method comprises the steps of segmenting and transmitting information to be transmitted into a plurality of mailboxes in a decentralized and distributed mode, and meanwhile encrypting and decrypting the information through the combination of an asymmetric encryption algorithm and a symmetric encryption algorithm to obtain plaintext information; in the communication process, information is completely transmitted, and the transmission efficiency is improved; information leakage is avoided, and privacy and safety of users are protected; moreover, the mailbox is used as a carrier for information transmission, so that the maintenance and use cost is saved.

Drawings

FIG. 1 is a flow chart of a mail communication method for implementing decentralized distributed encryption based on a mail server according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating registering a mailbox and changing mailbox configuration according to an embodiment of the present invention;

fig. 3 is a flowchart of exchanging keys between the receiver user and the sender user according to an embodiment of the present invention;

fig. 4 is a schematic diagram of exchanging communication keys and communications between users according to the embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, a mail communication method for implementing decentralized distributed encryption based on a mail server, where users who set registrable mailboxes include a receiver user and a sender user, includes the following steps:

In the embodiment, the information to be sent is divided into a plurality of mailboxes through a plurality of mailbox addresses registered by the user, distributed communication of the information is realized, and then the receiver user obtains the plaintext through the asymmetric encryption algorithm and the symmetric encryption algorithm, so that the safety of instant messaging is improved.

Example 2

In this embodiment, on the basis of embodiment 1, as shown in fig. 1, the step a includes the following steps:

Example 3

In this embodiment, on the basis of embodiment 2, as shown in fig. 2, the step b includes the following steps:

The user registration is finished in an asymmetric encryption mode, so that the safety of user information is ensured; and a plurality of mailbox addresses registered by the users are all stored in the registration server, at the moment, registered mailboxes of different users are recorded in the registration server, and the users can conveniently communicate with each other by acquiring a mailbox address group of the other user, so that the information can be conveniently split and transmitted.

Example 4

In this embodiment, on the basis of embodiment 3, as shown in fig. 2, the step b further includes the following steps:

Example 5

On the basis of embodiment 1, as shown in fig. 3, the present embodiment further includes the following steps:

Example 6

In this embodiment, on the basis of embodiment 5, as shown in fig. 3, the step d includes the following steps:

d103, sending the encrypted symmetric encrypted key to the sender user;

and d104, after receiving the encrypted symmetric encryption key, the sender user decrypts the key through a private key to obtain the symmetric encryption key, so that the subsequent communication encryption of the user is facilitated.

In this embodiment, the specific process of exchanging the symmetric key between the communication users is as follows:

4. the user B sends the mail to the user A;

Example 7

In this embodiment, on the basis of embodiment 6, as shown in fig. 1, the step e includes the following steps:

Information to be sent is segmented, fragmentation processing of the information is achieved, information is prevented from being stolen, privacy safety between communication users is protected, and a specific flow is shown in fig. 4:

1. the user A encrypts the information to be sent by using a symmetric encryption key;

2. the user A divides the information (pictures, audio and video are packed into attachments for division) according to the number of the available mailboxes of the opposite side (3 are set here), and sends 3 mails to 3 mailboxes of the user B through an SMTP mail group (two paths of concurrent transmission);

3. the user B combines the information of the received 3 mails;

4. the user B decrypts the information by using the symmetric key to obtain plaintext information;

5. similarly, user B can reply to the message using the above method.

Example 8

In this embodiment, on the basis of embodiment 6, as shown in fig. 1, the step f includes the following steps:

f101, after receiving the divided information, merging the information;

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A mail communication method for realizing decentralized distributed encryption based on a mail server sets users capable of registering a mailbox to comprise a receiver user and a sender user, and is characterized by comprising the following steps:

f. combining the information which is divided and sent to a plurality of mailboxes, and decrypting the information according to the exchanged key to obtain plaintext information;

the step a comprises the following steps:

a104, storing a plurality of mailboxes filled by a user into a registration server through available registration mailboxes;

the step b comprises the following steps:

b104, after the encrypted registration information is obtained, decrypting based on a private key related to the user ID information to finish registration;

the step b further comprises the following steps:

b204, after the encrypted mailbox configuration is received, decrypting based on a private key related to the user ID information, and recording and storing;

further comprising the steps of:

defining a server which completes SMTP mail sending fastest as a preferred SMTP server;

the step d comprises the following steps:

d103, sending the encrypted symmetric encrypted key to the sender user;

d104, after receiving the encrypted symmetric encrypted key, the sender user decrypts the key through a private key to obtain the symmetric encrypted key;

the step e comprises the following steps:

e103, the segmented information is sent to a plurality of mailboxes of the receiver users through the preferred SMTP server;

the step f comprises the following steps:

f101, after receiving the divided information, merging the information;