TWI425381B - Mobile device and method for encrypting files thereof - Google Patents

Description

Handheld mobile electronic device and method for encrypting files in the device

The present invention relates to a handheld mobile electronic device and a method of performing file encryption in the device.

At present, mobile mobile devices with actionable features are becoming more and more widely used, and such electronic devices provide great convenience for communication, entertainment and data exchange. The main handheld mobile electronic devices include mobile phones, PDAs (personal digital assistants), handheld game consoles and digital cameras.

With the continuous application of handheld mobile electronic devices, it is becoming more and more common to store data using handheld mobile electronic devices, such as storing transmitted information, captured pictures, and video materials. In order to ensure information security, encrypting stored data can greatly prevent user data leakage and protect user privacy.

In view of the above, it is necessary to provide a method for encrypting files in a handheld mobile electronic device, which can encrypt files stored in the handheld mobile electronic device to ensure user information security.

A handheld mobile electronic device, the handheld mobile electronic device includes: a setting module, configured to set an encrypted password of the file, the set password is a digital password; and the reading module is configured to read the bit that constitutes the file The tuple code, with ten byte codes as one line, so that each line corresponds to one digit password; the search module is used to find out where each password is located in each line of the byte code; the encryption module is used for The digits of the password corresponding to each row of the byte code The position is inserted into the randomly generated byte code to encrypt each line; the generating module is used to combine the encrypted byte codes to generate an encrypted file.

A method for performing file encryption in a handheld mobile electronic device, the method comprising the steps of: setting an encrypted password of a file, the set password is a digital password; reading a byte code constituting the file, and taking ten bits The tuple code is one line, so that each line corresponds to one digit password; find each password in the position of the byte code of each line; insert the randomly generated byte code at the position of the digit password corresponding to each line of the byte code , thus encrypting each line; combining the encrypted byte codes to generate an encrypted file.

Compared with the prior art, the handheld mobile electronic device and the file encryption method in the device can encrypt the file stored in the handheld mobile electronic device to ensure the user's information security.

FIG. 1 is a structural diagram of a handheld mobile electronic device of the present invention. The handheld mobile electronic device 1 refers to a mobile phone, a personal digital assistant (PDA), and the like. The handheld mobile electronic device 1 includes a setting module 20, a reading module 21, a search module 22, an encryption module 23, and a generating module 24.

The handheld mobile electronic device 1 comprises a memory 3. The memory 3 is used for storing various types of materials, such as files, pictures and video materials. The memory 3 may be the memory of the handheld mobile electronic device 1 itself, or may be an external storage card, such as a SIM card (Smart Media Card). Body card), SD card (Secure Digital Card), CF card (ComPact Flash Card, standard flash memory card), MMC card (Mnlti Media Card), MS card (Memory Stick, Memory Stick) ), XD card (Extreme Digital Card), TF card (Trans Flash Card), etc.

The setting module 20 is configured to set an encrypted password of the file, and the set password is a digital password. The file may be an archive (eg, Word material), a picture, and a video material. The set passwords are all digit passwords and the maximum length is no more than 16 digits.

The reading module 21 is configured to read a byte code constituting the file, and use ten byte codes as one line, so that each line corresponds to one digit password. Specifically, files stored inside the computer are composed of Bytes. As shown in FIG. 4, it is a byte code of a file. As can be seen from the figure, when the read module 21 reads the byte code of the file, the ten byte code is one line, and Each byte of each line has a position label, the number is from 0 to 9, assuming that the password set by the user is 650218, and each line corresponds to a digit password. For example, the byte of the first line corresponds to a digit. The password is 6, the digit code corresponding to the byte code of the second line is 5, the byte code corresponding to the digit of the third line is 0, and the byte code of the fourth line corresponds to the digit password of 2, the fifth line The byte code corresponding to the digit code is 1, the byte code of the sixth line corresponds to the digit password of 8, and then every six lines as a loop, followed by the corresponding digit password, that is, the byte code of the seventh row. Also 6, according to this loop, up to the end of the byte code.

The search module 22 is configured to find each password in a corresponding row. location. Specifically, as shown in FIG. 4, taking the first row of the byte code as an example, the corresponding digit password of the row is 6, and the location of the digit password is the position marked with 6, if the third behavior example, If the corresponding digit password of the line is 0, the location of the digit password is the position marked with 0.

The encryption module 23 is configured to insert two randomly generated byte codes at the position of the digital password corresponding to each row of the byte code, thereby encrypting each row. The inserted byte code may be two bytes or more than two bytes. The more the inserted byte, the higher the degree of encryption. In the preferred embodiment, the inserted bit The number of groups is two. The inserted byte code is generated by a random function (Random). Specifically, taking the first row of the byte code in FIG. 4 as an example, the corresponding digit password of the row is 6, and the location is 6, and two byte codes are inserted after the sixth position of the row. As shown in FIG. 5, the process of encrypting the first row of the byte code in FIG. 4 can be seen from the figure, after inserting two randomly generated byte codes (two underlined in FIG. 5) The byte code), which contains 12 byte codes. After encrypting the byte code of each row in FIG. 4, FIG. 6 is a schematic diagram after encryption.

The generating module 24 is configured to combine the encrypted byte codes to generate an encrypted file. After the encrypted file, you need to enter a password to read it.

2 is a flow chart of a preferred embodiment of a method for encrypting files in a handheld mobile electronic device according to the present invention. First, in step S10, the setting module 20 sets an encrypted password of the file, and the set password is a digital password. The file may be an archive (eg, Word material), a picture and a video asset. material. The set passwords are all digit passwords and the maximum length is no more than 16 digits.

In step S11, the reading module 21 reads the byte code constituting the file, and takes ten byte codes as one line, so that each line corresponds to one digit password. Specifically, files stored inside the computer are composed of Bytes. As shown in FIG. 4, it is a byte code of a file. As can be seen from the figure, when the read module 21 reads the byte code of the file, the ten byte code is one line, and Each byte of each line has a position label, the number is from 0 to 9, assuming that the password set by the user is 650218, and each line corresponds to a digit password. For example, the byte of the first line corresponds to a digit. The password is 6, the digit code corresponding to the byte code of the second line is 5, the byte code corresponding to the digit of the third line is 0, and the byte code of the fourth line corresponds to the digit password of 2, the fifth line The byte code corresponding to the digit code is 1, the byte code of the sixth line corresponds to the digit password of 8, and then every six lines as a loop, followed by the corresponding digit password, that is, the byte code of the seventh row. Also 6, according to this loop, up to the end of the byte code.

In step S12, the search module 22 finds out the location of the digit password corresponding to each row of the byte code. Specifically, as shown in FIG. 4, taking the first row of the byte code as an example, the corresponding digit password of the row is 6, and the location of the digit password is the position marked with 6, if the third behavior example, If the corresponding digit password of the line is 0, the location of the digit password is the position marked with 0.

In step S13, the encryption module 23 inserts two randomly generated byte groups at the position of the digital password corresponding to each row of the byte code, thereby encrypting each line. The inserted byte code may be two bytes or More than two bytes, the more the inserted bytes, the higher the degree of encryption. In the preferred embodiment, the number of inserted bytes is two. The inserted byte code is generated by a random function (Random). Specifically, taking the first row of the byte code in FIG. 4 as an example, the corresponding digit password of the row is 6, and the location is 6, and two byte codes are inserted after the sixth position of the row. As shown in FIG. 5, the process of encrypting the first row of the byte code in FIG. 4 can be seen from the figure, after inserting two randomly generated byte codes (two underlined in FIG. 5) The byte code), which contains 12 byte codes. After encrypting the byte code of each row in FIG. 4, FIG. 6 is a schematic diagram after encryption.

In step S14, the generating module 24 combines the encrypted byte codes to generate an encrypted file. Encrypted file, you need to enter a password to read

FIG. 3 is a flow chart of a preferred embodiment of a file decryption method in a handheld mobile electronic device according to the present invention.

First, in step S20, the byte code of the encrypted file is read in a row of twelve byte codes. The file may be an archive (eg, Word material), a picture, and a video material.

In step S21, the password set by the user is input. The set passwords are all digit passwords and the maximum length is no more than 16 digits.

In step S22, it is found that the digit password corresponding to each row of the byte code is located at the row. Specifically, as shown in FIG. 6 , taking the first row of the byte code as an example, the corresponding digit password of the row is 6, and the location of the digit password is the position marked with 6, if the third behavior example, The digital password corresponding to the line If it is 0, the location of the digit password is the position marked with 0.

In step S23, the two byte codes following the position of the digit password in each row are removed, and the file is decrypted. Specifically, taking the first row of the byte code in FIG. 6 as an example, the corresponding digit password of the row is 6, and after the location 6, the two byte codes corresponding to the positions 7 and 8 are taken out, and the row position is The tuple code is restored to the previous byte code to complete the decryption action.

In step S24, the decrypted byte codes are combined and restored to the original byte code of the file. If the password entered by the user is incorrect, the decryption cannot be performed correctly, and the decrypted file is not the original file.

It should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments thereof The technical solutions are modified or equivalently substituted without departing from the spirit and scope of the technical solutions of the present invention.

Handheld mobile electronic device ‧‧1

Memory ‧‧3

Setting up the module ‧‧20

Reading module ‧‧21

Search module ‧‧22

Encryption module ‧‧23

Generating module ‧‧24

1 is a block diagram of a handheld mobile electronic device of the present invention.

2 is a flow chart of a preferred embodiment of a method for encrypting files in a handheld mobile electronic device according to the present invention.

3 is a flow chart of a preferred embodiment of a method for decrypting files in a handheld mobile electronic device according to the present invention.

4 is a schematic diagram of a file byte before file encryption according to a preferred embodiment of the present invention.

FIG. 5 is a schematic diagram of a process of encrypting a file in a handheld mobile electronic device according to the present invention.

FIG. 6 is a schematic diagram of a byte code after file encryption according to the present invention.

Handheld mobile electronic device ‧‧1

Memory ‧‧3

Setting up the module ‧‧20

Reading module ‧‧21

Search module ‧‧22

Encryption module ‧‧23

Generating module ‧‧24

Claims (6)

A handheld mobile electronic device, the handheld mobile electronic device includes: a setting module, configured to set an encrypted password of the file, the set password is a digital password; and the reading module is configured to read the bit that constitutes the file a tuple code, with ten byte codes as one line, so that each line corresponds to one digit password; a search module is used to find out the position of the digit password corresponding to each line of the byte code in the line; a group for inserting a randomly generated byte code at a position of a digit cipher corresponding to each row of the byte code to encrypt each line; and generating a module for combining the encrypted byte code Together, generate an encrypted file. The hand-held mobile electronic device of claim 1, wherein the randomly generated byte code is generated by a Random function. The handheld mobile electronic device of claim 1, wherein the handheld mobile electronic device is a mobile phone or a PDA. A method for performing file encryption in a handheld mobile electronic device, the method comprising the steps of: setting an encrypted password of a file, the set password is a digital password; reading a byte code constituting the file, and taking ten bits The tuple code is one line, so that each line corresponds to one digit password; find the digit password corresponding to each row of the tuple code at the position of the line; A randomly generated byte code is inserted at a position of the digit cipher corresponding to each row of the byte code to encrypt each line; and the encrypted byte code is combined to generate an encrypted file. The method for performing file encryption in a handheld mobile electronic device as described in claim 4, wherein the randomly generated byte code is generated by a Random function. The method for performing file encryption in a handheld mobile electronic device as described in claim 4, wherein the handheld mobile electronic device is a mobile phone or a PDA.