TWI237483B - Mobile phone with file encrypting function and method of file encryption thereof - Google Patents

Abstract

A mobile phone with file encrypting function and method of file encryption thereof is disclosed. The host of mobile phone has encrypting software. The encrypting software encrypts/decrypts the file transmitted from the computer base on a key. The method of file encryption mainly comprises the following steps: (a) establish a transmitting channel between the computer and the mobile phone, (b) divide a first file into at least one first packet, (c) proceed a process of packet encryption/decryption to encrypt/decrypt and transform a first packet into a second packet and then transmit to the computer, (d) repeat the process of packet encryption/decryption until all the first packets are encrypted/decrypted, (e) compose all the second packets to form a second file. Certainly, the whole file can be transmitted to the mobile phone at a time and transmitted back to the computer after being encrypted/decrypted.

Description

1237483 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to a mobile phone with a file security function and a method for file security, and more particularly to a mobile phone and a computer through A mobile phone that encrypts / decrypts files stored on your computer. Prior technology In recent years, information technology has been advancing by leaps and bounds. Electronic information products such as Computers, Personal Digital Assistants (PDAs), and Mobile Phones are everywhere in life. In particular, people's dependence on computers is increasing day by day. Many video and audio information, text information, programs, and personal data are stored on computers as electronic files. Among the files stored on the computer, there are many important files that are private to the individual or confidential to the group. Therefore, the need for confidentiality of archives is increasing. At present, many security accessories can be connected to a computer to encrypt / decrypt files stored in the computer. However, these security accessories have only a single function of encryption / decryption. In order to achieve security and convenience, the security accessories need to be stored separately or carried with them, but it will cause a burden on the users of the security accessories. In addition, users who are familiar with security accessories need to memorize a password. When they want to encrypt / decrypt files stored in the computer, enter this password to perform file encryption / decryption. If the user of the security accessory forgets this password, the file stored in the computer cannot be encrypted / decrypted, and the damage caused by it

11813TWF.PTD Page 7 1237483 V. Description of the invention (2) The loss is difficult to estimate. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a mobile phone with a file security function and a file security method thereof, which are suitable for encrypting / decrypting a file stored in a computer by a mobile phone that is carried around without additional Bring confidential accessories and remember passwords. Based on the above object, the present invention proposes a mobile phone with a file security function, which is suitable for encrypting / decrypting a file stored in a computer. Among them, the computer has a first security software, and there is a transmission channel between the computer and the mobile phone. The mobile phone in this embodiment is mainly composed of a host, a mobile communication transceiver, and a human-machine interface. Among them, the host has a second secret software. The second security software system corresponds to the first security software. Moreover, the second security software system is adapted to encrypt / decrypt files stored in the computer based on a key. The mobile communication transceiver is electrically coupled to the host. The human-machine interface is electrically coupled to the host, and is suitable for inputting operation instructions and displaying messages. In addition, the mobile phone in this embodiment has, for example, an identification code, and the key is associated with the identification code. The transmission channel between the computer and the mobile phone is, for example, a wired transmission channel or a wireless transmission channel. The human-machine interface is composed of an output device and an input device, for example. The output device is electrically coupled to the host, and is suitable for displaying messages to be read by the user of the mobile phone. The input device is electrically coupled to the host, and is suitable for users of mobile phones to input operating instructions.

11813TWF.PTD Page 8 1237483 V. Description of Invention (3) Order to mobile phone. Of course, the man-machine interface can also be a touch screen or other integrated man-machine interface. Based on the above objectives, the present invention further proposes a file security method suitable for encrypting / decrypting a first file stored in a computer by a mobile phone. The file security method of this embodiment mainly includes the following steps: (a) establishing a transmission channel between a mobile phone and a computer. (B) Transfer the first case from the computer to the mobile phone. (C) Encrypt / decrypt the first slot case according to a key to form a second file. (D) Transfer the second file to the computer. Based on the above objectives, the present invention further proposes a file security method suitable for encrypting / decrypting a first file stored in a computer by a mobile phone. The file security method of this embodiment mainly includes the following steps: (a) establishing a transmission channel between a mobile phone and a computer. (B) Cut the first file to form a plurality of first packets. (C) Perform a packet encryption / decryption step on the first packet. (D) Repeat the above-mentioned packet encryption / decryption steps until all the first packets have been encrypted / decrypted. (E) Combine all the second packets to form a second file. Among them, the above-mentioned packet encryption / decryption steps include: (1) transmitting one of the first packets from the computer to the mobile phone. (2) Encrypt / decrypt the first packet transmitted to the mobile phone according to a key to form a second packet. (3) Transfer the above second packet from the mobile phone to the computer. In addition, in the file security methods of the above two embodiments, the mobile phone has, for example, an identification code, and the key is associated with the identification code. Electricity

11813TWF.PTD Page 9 1237483 V. Description of the Invention (4) 3 The transmission channel is, for example, a wired transmission channel or a wireless transmission channel of a brain and a mobile phone. According to the case of the file confidentiality combination of this issue, "there is no need for important files and their files, but the methods mentioned above and special mentions have a file security function method, which not only has the security function of mobile phones, but also makes mobile phones It can memorize a password outside the function, and then it can be encrypted / decrypted according to the action plan. Therefore, the real security method enables the mobile phone to encrypt / decrypt important files. Other objects, features, and advantages can be further implemented in conjunction with the accompanying drawings to make the mobile phone and its mobile communication function more comprehensive. In addition, the identification code of the phone is the mobile phone of the embodiment. The user may at any time as needed to make the present invention obvious and easy to understand. The detailed description is as follows. FIG. 1 is a block diagram of a mobile phone with an encryption function according to a preferred embodiment of the present invention. Please refer to Fig. 1. Action 1-〇 is mainly composed of a host 110, a mobile communication transceiver 12 〇, and interface 130. Among them, the mobile communication transceiver 20 is connected to the host 110 to provide the most basic mobile communication of the mobile phone 100 1. The human-machine interface 130 is electrically coupled to the host 丨 丨 〇, and is suitable for instructions and displays messages. The picture of Yu Han_ $ f 1 is shown as the transmission channel between the computer and the brain device of the son-in-law computer 10 according to the preferred embodiment of the present invention. The mobile phone 100 can Via < a file

1237483 V. Description of the invention '--- Encrypt / decrypt. Among them, the computer 50 has a first security software and 110 has a second security software. The second security software system corresponds to the first-security software. Moreover, the second security software system is suitable for encrypting / decrypting files stored in the computer 50 based on a secret key. — In addition, the mobile phone 100 has, for example, an identification code, and the aforementioned male and female trains are associated with the identification code. Since ordinary mobile phones have unique identification codes, users do not need to remember any passwords, they can encrypt / decrypt files based on the keys associated with the identification codes. Therefore, there is no need to worry about being unable to encrypt / decrypt the file due to forgetting the password, especially to avoid the loss caused by the decryption of the helmet when the encrypted file is urgently needed. … ^ In addition, the transmission channel 70 between the computer 50 and the mobile phone 100 is, for example, a wired transmission channel. Among them, the computer 50 is connected to a transmission line, for example, and the transmission line is connected to a computer's RS 2 3 2 port, a universal serial bus (Universal 1 serial bus, USB) port, and a parallel port. Various ports. Of course, the transmission channel 70 between the computer 50 and the mobile phone 100 may also be a line transmission channel. The computer 50 has, for example, a first wireless transceiver, and the mobile phone has, for example, a second wireless transceiver. Between the first transceiver and the first transceiver, for example, various wireless transmission media and transmission protocols such as infrared rays, Bluetooth, and Wireless 1c ^ network WLAN are used as transmission channels. In addition, the human-machine interface 130 shown in FIG. 1 is

1237483 V. Description of the invention (6) The output device and a command input device are composed. Among them, the image output device is electrically coupled to the host, and is suitable for displaying messages to be read by the user of the mobile phone. The command input device is electrically coupled to the host, and is suitable for providing a user of a mobile phone to input operation instructions to the mobile phone. Of course, the man-machine interface 130 may also be a touch screen or other integrated man-machine interface. FIG. 3 shows a flowchart of a file security method according to a preferred embodiment of the present invention. The file security method of the preferred embodiment is suitable for encrypting / decrypting a first file stored in a computer by a mobile phone. Among them, the characteristics of mobile phones and computers have been described above, and will not be repeated here. Referring to FIG. 3, step S310 is to establish a transmission channel between the mobile phone and the computer. Among them, the transmission channel is also the same as described above, including a wireless transmission channel or a wired transmission channel. The first file is selected by the user running the aforementioned first security software on a computer, and the file is selected in the software interface. Then, the method proceeds to step S320, where the first file is transmitted from the computer to the mobile phone. Then, step S330 is performed to encrypt / decrypt the first file transmitted to the mobile phone according to a key to form a second file. Finally, execute step S 3 40 to transfer the second file from the mobile phone to the computer. In step S330, the user executes the aforementioned second security software on the mobile phone, and the second security software completes the encryption / decryption of the first packet according to the key. To prevent file sizes from exceeding the memory space of your mobile phone,

11813TWF.PTD Page 12 1237483 V. Description of the invention (7) It is difficult to implement the foregoing preferred embodiment, and the present invention proposes another preferred embodiment. FIG. 4 is a flowchart of a file security method according to another preferred embodiment of the present invention. The file security method of the preferred embodiment is adapted to encrypt / decrypt a first file stored in a computer by a mobile phone. Referring to FIG. 4, step S410 is to establish a transmission channel between the mobile phone and the computer. Step S 4 2 0 is to cut the first file to form a plurality of first packets. Among them, the transmission channel is also the same as above, including a wireless transmission channel or a wired transmission channel. The first file is selected by the user running the aforementioned first security software on a computer, and the file selection is completed in the software interface. After completing steps S410 and S420, the process proceeds to step S430. Step S430 is transmitting one of the first packets from the computer to the mobile phone. Then step S440 is executed to encrypt / decrypt the first packet transmitted to the mobile phone according to a key to form a second packet. Then step S450 is executed to transmit the second packet from the mobile phone to the computer. In step S440, the user executes the aforementioned second security software on the mobile phone, and the second security software completes the encryption / decryption of the first packet according to the key. After step S 450 is completed, step 4 60 is performed to determine whether all the first packets have been encrypted / decrypted. If there is still no encryption / decryption of the first packet, it returns to step S430. If all the first packets and packets have been encrypted / decrypted, go to step S470. Step S47 0 combines all the second packets to form a second file. Among them, step S470 is performed by the first security software in

11813TWF.PTD Page 13 1237483 V. Description of the invention (8) Completed on a computer. In summary, the mobile phone with file security function and its file security method according to the preferred embodiment of the present invention have the following advantages: (a) Combining the two functions of mobile communication and file security, so that the mobile phone has Greater added value. (b) Encrypt / decrypt important files to avoid losses due to file leakage. (c) Mobile phones are almost a necessity for people nowadays. They do not need to carry extra security accessories, which can reduce the burden on users. (d) The key for file encryption / decryption is related to the identification code of the mobile phone. It is not necessary to remember the password separately to avoid the loss caused by forgetting the password. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application.

11813TWF.PTD Page 14 1237483 Brief Description of Drawings Figure 1 shows a block diagram of a mobile phone with file security function according to a preferred embodiment of the present invention. FIG. 2 is a block diagram of a mobile phone and a computer with a file security function according to a preferred embodiment of the present invention. FIG. 3 is a flowchart of a method for protecting a file I according to a preferred embodiment of the present invention. I FIG. 4 is a flowchart illustrating a method for protecting an i-file according to another preferred embodiment of the present invention. [Illustration of diagrammatic representation] 50: computer | 7 0: transmission channel 1 0 0: mobile phone 1 1 0 · · host 1 2 0: mobile communication transceiver 1 3 0 · · man-machine interface step S310, step 410: establishment A transmission channel between the mobile phone and the computer Step S 3 20: Transfer the first file from the computer to the mobile phone Step S 330: Encrypt / decrypt the first file transmitted to the mobile phone according to a key to form a first file Two file steps S3 40: Transfer the second file from the mobile phone to the computer Step S4 20: Cut the first file to form a plurality of first packets Step S4 3 0 · Transfer one of the first packets from the computer to the mobile phone Step S440: According to The first key pair transmitted to the mobile phone

11813TWF.PTD Page 15 1237483 The diagram briefly explains the packet is encrypted / decrypted to form a second packet. Step S4 50: Transfer the second packet from the mobile phone to the computer. Step S4 6 0: Determine whether all the first packets are. Complete the encryption / decryption steps S 4 7 0 ··· Combine all second packets to form a second file

11813TWF.PTD Page 16

Claims (1)

1237483 VI. Scope of patent application 1. A mobile phone with file security function, suitable for encrypting / decrypting a file stored in a computer, wherein the computer has a first security software, and the computer and the mobile phone There is a transmission channel between them. The mobile phone includes at least: a host computer with a second security software, the second security software system corresponds to the first security software, and the second security software system is adapted to be based on a key. Encrypt / decrypt the file stored in the computer; a mobile communication transceiver electrically coupled to the host; and a man-machine interface electrically coupled to the host, suitable for inputting operating instructions and displaying messages . 2. The mobile phone with file security function described in item 1 of the scope of patent application has an identification code, and the key is associated with the identification code. 3. The mobile phone with file security function as described in item 1 of the scope of patent application, wherein the transmission channel includes a wired transmission channel. 4. The mobile phone with file security function described in item 1 of the scope of patent application, wherein the transmission channel includes a wireless transmission channel. 5. The mobile phone with file security function according to item 1 of the scope of patent application, wherein the man-machine interface includes: an output device electrically coupled to the host, suitable for displaying messages; and an input device, an electronic device Is coupled to the host, suitable for inputting operation instructions. 6. As described in item 1 of the scope of patent application, 11813TWF.PTD Page 17 1237483 6. Scope of patent application Mobile phone, in which the man-machine interface includes a touch screen. 7. A file security method suitable for encrypting / decrypting a first file stored in a computer by a mobile phone, the file security method at least includes: establishing a transmission channel between the mobile phone and the computer Transmitting the first file from the computer to the mobile phone; encrypting / decrypting the first file according to a key to form a second file; and transmitting the second file to the computer. 8. The file confidentiality method described in item 7 of the scope of patent application, wherein the mobile phone further has an identification code, and the key is associated with the identification code. 9. The file security method described in item 7 of the scope of patent application, wherein the transmission channel includes a wired transmission channel. 10. The file security method described in item 7 of the scope of patent application, wherein the transmission channel includes a wireless transmission channel. 11. A file security method adapted to encrypt / decrypt a first file stored in a computer by a mobile phone, the file security method at least comprises: establishing a transmission channel between the mobile phone and the computer Cutting the first file to form a plurality of first packets; performing a packet encryption / decryption step on the first packets, the packet encryption / decryption step including: transmitting one of the first packets from the computer to the mobile phone; 11813TWF.PTD Page 18 1237483 6. Application scope of patent; Encrypt / decrypt the first packet transmitted to the mobile phone according to a key to form a second packet; transmit the second packet from the mobile phone to The computer; repeating the packet encryption / decryption steps until all the first packets are encrypted / decrypted; and combining all the second packets to form a second file. 12 2. The file security method described in item 11 of the scope of patent application, wherein the mobile phone further has an identification code, and the key is associated with the identification code. 1 3. The method for file security described in item 11 of the scope of patent application, wherein the transmission channel includes a wired transmission channel. ^ 1 4. The file security method described in item 11 of the scope of patent application, wherein the transmission channel includes a wireless transmission channel. 11813TWF.PTD Page 19