CN112367323B - Text end-to-end encryption and decryption system and method of intelligent terminal - Google Patents

Abstract

The invention discloses a text end-to-end encryption and decryption system and method of an intelligent terminal, wherein the system comprises an input monitoring module, a decryption module and an encryption module, and the text encryption and decryption system interacts with a screen, a keyboard/input method and a text selector in the intelligent terminal through the input monitoring module; the input monitoring module captures the input of the keyboard/input method, transmits the captured plaintext data to the encryption module for text encryption, receives the encrypted text data returned by the encryption module, and replaces the plaintext input by the keyboard/input method with the encrypted text; the input monitoring module receives ciphertext text data of the text selector as input, transmits the ciphertext text data to the decryption module, receives a decryption result returned by the decryption module, and displays the decryption result on a screen of the intelligent terminal device; the system and the method of the invention are independent of specific communication application, and can be used by users in any communication application.

Description

An end-to-end text encryption and decryption system and method for an intelligent terminal

technical field

The invention relates to the technical field of intelligent terminals, in particular to an end-to-end text encryption and decryption system and method for intelligent terminals.

Background technique

As smart terminals such as smart phones and tablet computers are more and more widely used in daily life, smart terminals are inseparable from people's lives. Among them, the most widely and frequently used are various instant messaging applications, and text messages are the most commonly used communication methods. However, during the use of instant messaging applications, the user's private information, especially chat information, may be stolen or collected. The built-in end-to-end encryption of the communication application cannot technically guarantee the user that the application will not collect user privacy, and the use of an encryption and decryption scheme independent of the communication application requires the user to switch between different applications.

Contents of the invention

In order to overcome the above-mentioned problems in the prior art, the object of the present invention is to provide a convenient and easy-to-use system and method for end-to-end encryption and decryption of text information in an intelligent terminal, which does not depend on specific communication applications, and users can It can be used under any communication application.

In order to achieve the above object, the present invention adopts following technical scheme:

An end-to-end text encryption and decryption system for an intelligent terminal, including an input monitoring module 111, a decryption module 112, and an encryption module 113. The text encryption and decryption system 11 communicates with the screen 101 and keyboard/input method in the intelligent terminal 10 through the input monitoring module 111 102. Interact with the text selector 103;

The input monitoring module 111 captures the input of the keyboard/input method 102, transmits the captured plain text data to the encryption module 113 for text encryption, and receives the encrypted text data returned by the encryption module 113, replaces the keyboard/input method with the encrypted text The plaintext text that input method 102 inputs; Input monitoring module 111 receives the ciphertext data of text selector 103 as input, and ciphertext data is transmitted to decryption module 112, receives the deciphering result that deciphering module 112 sends back, and deciphering result displayed on the screen 101 of the smart terminal device;

The decryption module 112 stores the public keys of other encryption and decryption systems input by the user, receives the encrypted text information input into the monitoring module 111, and uses the public keys of other encryption and decryption systems stored in the decryption module 112 to decrypt the encrypted text information to obtain plaintext Text set, and the plaintext text set is scored, and the decryption result is returned to the input monitoring module 111;

The encryption module 113 is used to generate and store the private key/public key pair of the system, and provide the public key of the system to the user, so that the user passes it to the encryption and decryption system in other terminals; the encryption module 113 receives the input monitoring module 111 Captured plaintext data, and use the local private key stored in the encryption module 113 to encrypt the received plaintext data, and return the encryption result to the input monitoring module 111 .

The encryption and decryption method of the text end-to-end encryption and decryption system of the intelligent terminal comprises the following steps:

Step 1: Before text encryption and decryption, the two smart terminals that communicate need to prepare:

1) Two smart terminals respectively use the encryption module 113 to generate the private key/public key pair of their respective encryption and decryption systems;

2) The users of the two smart terminals respectively transmit the public key of the terminal to the terminal user of the other party through a trusted channel;

3) The users of the two terminals respectively input the public key of the opposite end into the decryption module 112 of the terminal;

Step 2: The text end-to-end encryption process of the smart terminal, as follows:

1) When text encryption is enabled, when the keyboard/input method 102 is awakened, the input monitoring module 111 captures user input and transmits the input plain text data to the encryption module 113;

2) The encryption module 113 encrypts the received plain text using the stored private key, and returns the encryption result to the input monitoring module 111;

3) The input monitoring module 111 replaces the plaintext text input by the keyboard/input method 102 with the ciphertext text, and now the plaintext text in the input box seen by the user has been replaced with the ciphertext text for display;

4) The user can directly send the cipher text information;

Step 3: The end-to-end decryption process of the text of the smart terminal, as follows:

1) After receiving the ciphertext information sent by other encryption and decryption systems, the user uses the text selector 103 to select to decrypt the ciphertext information;

2) The decryption module 112 uses the public keys of other encryption and decryption systems stored therein, and collects each public key to decrypt the cipher text information respectively to obtain the plaintext text set;

3) The decryption module 112 uses the common character set of the current system language to score each plaintext text in the plaintext text set, and examines whether it is the result of successful decryption;

4) Judging whether the score of plain text exceeds the set value;

5) If there is, it is considered that the decryption is successful, and the plain text information with the highest score is the correct result, which is directly displayed on the screen 101 for the user to check;

6) Otherwise, it is considered that the public key that can decrypt the ciphertext text is not stored in the decryption module of this system, and the decryption fails, and the user is prompted to fail to decrypt on the screen 101;

7) When the decryption fails, or it is not necessary after the decryption is successful, ask the user whether to specify the public key to decrypt the ciphertext;

8) When the user chooses to use the specified public key for decryption, the plain text information decrypted by the specified public key is displayed on the screen 101 .

Compared with the prior art, the present invention has the following advantages:

Compared with the built-in end-to-end encryption and decryption method of the communication application, the present invention is independent of the communication application and eliminates the risk of the communication information being collected by the communication application.

Compared with an independent encryption and decryption system, the present invention is easy to use and can be embedded in any communication application for implementation, so that users do not have to switch back and forth between the encryption and decryption system and the communication application.

Description of drawings

FIG. 1 is a structural diagram of an end-to-end text encryption and decryption system for an intelligent terminal.

Fig. 2 is a flow chart of exchanging public keys in the encryption and decryption method of the smart terminal in the embodiment.

Fig. 3 is a flow chart of the information sending end encrypting and sending information in the smart terminal encryption and decryption method in the embodiment.

Fig. 4 is a flow chart of decrypting information at the information receiving end in the encryption and decryption method of the smart terminal in the embodiment.

Detailed ways

The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 , the present invention is an end-to-end text encryption and decryption system for smart terminals. The text encryption and decryption system 11 includes an input monitoring module 111, a decryption module 112 and an encryption module 113. The text encryption and decryption system 11 passes through the input monitoring module. 111 interacts with the screen 101 , the keyboard/input method 102 and the text selector 103 in the smart terminal 10 .

The screen 101 is a common hardware device of an intelligent terminal device, and is used to display terminal information and data processing results to the user.

The keyboard/input method 102 is an input component of an intelligent terminal, which may be a soft keyboard or an input method, or may be a hardware keyboard.

The text selector 103 is a software component of the smart terminal, which is used to select a text segment and pop up options to operate on the text.

The input monitoring module 111 captures the input of the keyboard/input method 102, transmits the captured plain text data to the encryption module 113 for text encryption, and receives the encrypted text data returned by the encryption module 113, and replaces the keyboard/input method with encrypted text 102 input plain text; input monitoring module 111 receives the cipher text data of text selector 103 as input, and cipher text data is transmitted to deciphering module 112, receives the deciphering result that deciphering module 112 returns, and deciphering result is displayed on on the screen 101 of the smart terminal device.

The decryption module 112 stores the public keys of other encryption and decryption systems input by the user, receives the encrypted text information input into the monitoring module 111, and uses the public keys of other encryption and decryption systems stored in the decryption module 112 to decrypt the encrypted text information to obtain a plain text set , and score the plaintext text set, and return the decryption result to the input monitoring module 111 .

The encryption module 113 is used to generate and store the private key/public key pair of this system, and provide the public key of this system to the user so that the user can pass it to the encryption and decryption system in other terminals; the encryption module 113 receives the input monitoring module 111 to capture and encrypt the received plaintext data with the local private key stored in the encryption module 113, and return the encryption result to the input monitoring module 111.

Figure 2 shows the preparatory work required for two intelligent terminals to communicate before text encryption and decryption.

Step 1: The two smart terminals respectively use the encryption module 113 to generate the private key/public key pair of their respective encryption and decryption systems.

Step 2: The users of the two smart terminals respectively transmit the public key of the terminal to the terminal user of the other party through a trusted channel.

Step 3: The users of the two terminals respectively input the public key of the opposite terminal into the decryption module 112 of the terminal.

Fig. 3 is the flow chart of the text end-to-end encryption method of the smart terminal provided by the embodiment, which mainly includes the following steps:

Step 301 , when text encryption is enabled, when the keyboard/input method 102 is woken up, the input monitoring module 111 captures user input and transmits the input plain text data to the encryption module 113 .

Step 302 , the encryption module 113 uses the stored private key to encrypt the received plaintext, and returns the encryption result to the input monitoring module 111 .

Step 303 , the input monitoring module 111 replaces the plain text input by the keyboard/input method 102 with the cipher text, and at this time, the plain text in the input box seen by the user has been replaced with the cipher text for display.

Step 304, the user can directly send the ciphertext information.

Fig. 4 is the flow chart of the end-to-end decryption method of the smart terminal text provided by the embodiment, mainly including the following steps:

Step 401 , after receiving the ciphertext information sent by other encryption and decryption systems, the user uses the text selector 103 to choose to decrypt the ciphertext information.

Step 402 , the decryption module 112 uses the public keys of other encryption and decryption systems stored therein, and collects each public key to decrypt the cipher text information respectively to obtain a plain text set.

Step 403 , the decryption module 112 uses the common character set C of the current system language L to score each plaintext text in the plaintext text set, and examines whether it is the result of successful decryption.

Step 404, judging whether the score of any plain text exceeds the set value S.

Step 405 , if yes, it is considered that the decryption is successful, and the plaintext information with the highest score is the correct result, which is directly displayed on the screen 101 for the user to view.

Step 406, otherwise, it is considered that the decryption module of the system does not store a public key capable of decrypting the ciphertext, and the decryption fails, and the user is prompted on the screen 101 that the decryption fails.

Step 407: When the decryption fails, or it is not necessary after the decryption is successful, ask the user whether to specify the public key to decrypt the ciphertext.

Step 408 , when the user chooses to use the specified public key for decryption, the plaintext information decrypted by the specified public key is displayed on the screen 101 .

Claims (1)

1. A text end-to-end encryption and decryption system of an intelligent terminal, characterized in that: comprising an input monitoring module (111), a decryption module (112) and an encryption module (113), the text encryption and decryption system (11) passes through the input monitoring module (111) interact with the screen (101), keyboard/input method (102), and text selector (103) in the smart terminal (10); The input monitoring module (111) captures the input of the keyboard/input method (102), transmits the captured plain text data to the encryption module (113) for text encryption, and receives the encrypted text returned by the encryption module (113) Data, replace the plaintext text of keyboard/input method (102) input with encrypted text; Input monitoring module (111) receives the ciphertext data of text selector (103) as input, and ciphertext data is transmitted to deciphering module (112) ), receive the decryption result returned by the decryption module (112), and display the decryption result on the screen (101) of the intelligent terminal device; The decryption module (112) stores the public keys of other encryption and decryption systems input by the user, receives the encrypted text information input into the monitoring module (111), and encrypts it with the public keys of other encryption and decryption systems stored in the decryption module (112) The text information is decrypted to obtain a plaintext text set, and the plaintext text set is scored, and the decryption result is returned to the input monitoring module (111); The encryption module (113) is used to generate and store the private key public key pair of the system, and provides the public key of the system to the user, so that the user passes it to the encryption and decryption system in other terminals; the encryption module (113) receives the input The plain text data captured by the monitoring module (111), and the received plain text data encrypted using the local private key stored in the encryption module (113), and the encryption result is returned to the input monitoring module (111); The encryption and decryption method of the text end-to-end encryption and decryption system of the intelligent terminal comprises the following steps: Step 1: Before text encryption and decryption, the two smart terminals that communicate need to prepare: 1) Two smart terminals respectively use the encryption module (113) to generate the private key and public key pair of their respective encryption and decryption systems; 2) The users of the two smart terminals respectively transmit the public key of the terminal to the terminal user of the other party through a trusted channel; 3) The users of the two terminals respectively input the public key of the opposite end into the decryption module (112) of the terminal; Step 2: The text end-to-end encryption process of the smart terminal, as follows: 1) When text encryption is enabled, when the keyboard/input method (102) is awakened, the input monitoring module (111) captures user input and transmits the input plain text data to the encryption module (113); 2) The encryption module (113) encrypts the received plaintext text using the stored private key, and returns the encryption result to the input monitoring module (111); 3) The input monitoring module (111) replaces the plaintext text input by the keyboard/input method (102) with ciphertext text, and now the plaintext text in the input box seen by the user has been replaced with ciphertext text for display; 4) The user can directly send the cipher text information; Step 3: The end-to-end decryption process of the text of the smart terminal, as follows: 1) After receiving the ciphertext information sent by other encryption and decryption systems, the user uses the text selector (103) to select to decrypt the ciphertext information; 2) The decryption module (112) uses the public keys of other encryption and decryption systems stored therein, and collects each public key to decrypt the cipher text information respectively to obtain the plaintext text set; 3) the decryption module (112) uses the common character set of the current system language to score each plaintext text in the plaintext text set, and examines whether it is the result of successful decryption; 4) Judging whether the score of plain text exceeds the set value; 5) If there is, it is considered that the decryption is successful, and the plain text information with the highest score is the correct result, which is directly displayed on the screen (101) for the user to check; 6) Otherwise, it is considered that the public key that can decrypt the cipher text is not stored in the decryption module of this system, and the decryption fails, and the user is prompted to fail to decrypt on the screen (101); 7) When the decryption fails, or after the decryption succeeds, ask the user whether to specify the public key to decrypt the ciphertext; 8) When the user chooses to use the specified public key for decryption, the plain text information decrypted by the specified public key is displayed on the screen (101).

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