TWI788240B - Electronic device and data transmission method thereof - Google Patents

Abstract

This invention relates to an electronic device and a data transmission method thereof. The data transmission method includes: setting dummy data having a plurality of dummy bits; inserting the dummy bits of the dummy data into a transmission data according to an insertion type to generate an encryption data; and transmitting the encryption data to a memory device.

Description

Electronic device and data transmission method thereof

The present invention relates to an electronic device and a data transmission method thereof, and in particular to a data transmission method of an electronic device capable of ensuring data security.

In order to ensure that the data will not be stolen, an encryption mechanism is often set in the data transmission between the controller and the storage device. In the conventional technology, the controller can perform complex encryption operation on the transmission data and the information as the key to obtain the encrypted data. Such an encryption method needs to enable the receiving end to use the information as a key to perform reverse operations on the encrypted data to restore the transmitted data.

In addition, the conventional technology can also use the digital signature authentication method to make the receiving end confirm whether the received transmission data is correct and unaltered data. However, such a method cannot encrypt the transmitted transmission data, and cannot prevent the transmission data from being stolen. Moreover, the authentication action of the digital signature also requires a certain degree of complexity of the algorithm to perform, thus increasing the complexity of the hardware and increasing the required power consumption.

Based on the above, how to design an encryption mechanism that can ensure the security of transmitted data without requiring overly complicated algorithms and hardware circuits has become a design challenge in this field. An important topic for planners.

The invention provides an electronic device and a data transmission method, which can reduce the complexity of encryption operations and ensure the security of data transmission.

The data transmission method of the present invention includes: setting redundant data with a plurality of redundant bits; inserting redundant bits of the redundant data into the transmission data according to the insertion type, and generating encrypted data; and, transmitting the encrypted data to the storage device.

The electronic device of the present invention includes a storage device and a controller. The controller is coupled to the electronic device. The controller is used for setting redundant data with a plurality of redundant bits; inserting redundant bits of redundant data into the transmission data according to the insertion type, and generating encrypted data; and sending the encrypted data to the storage device.

Based on the above, the controller of the electronic device of the present invention generates encrypted data by inserting multiple redundant bits of the redundant data into the transmission data according to the insertion type. It can effectively reduce the complexity of generating encrypted data, and can ensure that the transmission data is stolen during transmission, effectively ensuring the security of the transmission data.

100, 400: electronic devices

110, 410: controller

120, 420: storage device

121, 4211: Find information

421, 500: lookup table

CDD1~CDDM: Redundant data to be checked

CI1~CIM: Insert type information to be checked

DD: redundant data

DD[0]~DD[N]: redundant bits

MD, 201, 202, 203, 204: encrypted data

S610~S630: Data transmission steps

TD: Transfer Data

TD[0]~TD[N]: bits

1 and 4 are schematic diagrams of electronic devices according to different embodiments of the present invention.

FIG. 2A to FIG. 2D are schematic diagrams illustrating a generation method of a plurality of encrypted data according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an implementation manner of generating encrypted data of an electronic device according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of searching information according to an embodiment of the present invention.

FIG. 6 is a flow chart of the data transmission operation of the embodiment of the present invention.

Please refer to FIG. 1 , which is a schematic diagram of an electronic device according to an embodiment of the present invention. The electronic device 100 includes a controller 110 and a storage device 120 . The controller 110 is coupled to the storage device 120 . The controller 110 and the storage device 120 perform operations of receiving and sending transmission data. When the controller 110 is going to transmit the transmission data to the storage device 120, the controller 110 can preset a redundant data. Redundant data has multiple redundant bits. Moreover, the controller 110 can insert multiple redundant bits of the redundant data into the transmission data according to an insertion type, so as to generate the encrypted data MD. Moreover, the controller 110 can transmit the encrypted data MD to the storage device 120 .

On the other hand, after receiving the encrypted data MD, the storage device 120 can obtain redundant data according to the insertion type based on a search information 121 . Here, the insertion type used by the controller 110 to generate the encrypted data MD may correspond to an insertion type information, and the insertion type information may be preset in the storage device 120 . In addition, the search information 121 may also be pre-stored in the storage device 120 . Therefore, after receiving the encrypted data MD, the storage device 120 can search the search information 121 according to the insertion type information to obtain the insertion type used by the controller 110 and the redundant data in the encrypted data MD. Then, the storage device 120 can be based on the plug-in type In this state, the encrypted data MD removes multiple redundant bits in the redundant data, and restores the transmitted data. In this way, the storage device 120 can perform the storage operation of the transmission data.

In this embodiment, the storage device 120 may be a programmable non-volatile memory, such as flash memory, resistive memory, magnetoresistive memory, phase change memory, or ferroelectric memory. The storage device 120 may also be a volatile memory, such as a dynamic random access memory or a static random access memory. In addition, the storage device 120 can store the search information 121 by using a memory storing transmission data. Alternatively, the search information 121 can also be stored in a memory that is different from the storage of the transmission data, and there is no fixed limit.

Incidentally, the search information 121 in this embodiment can be dynamically adjusted. The controller 110 can adjust for the applied insertion type and the corresponding inserted redundant data. After the adjustment, the controller 110 can update the search information 121 in the storage device 120 . The above-mentioned update operation of the search information 121 may be performed periodically to enhance the security of encrypted data.

The controller 110 of the present invention may be a processor with computing capability. Alternatively, the controller 110 can be designed through a hardware description language (Hardware Description Language, HDL) or any other digital circuit design method known to those skilled in the art, and through a field programmable logic gate array ( Field Programmable Gate Array, FPGA), Complex Programmable Logic Device (Complex Programmable Logic Device, CPLD), or a hardware circuit implemented in the form of an Application-specific Integrated Circuit (ASIC).

Regarding the types of insertion types, please refer to the schematic diagrams of the generation methods of multiple encrypted data in the embodiment of the present invention shown in FIG. 2A to FIG. 2D . In FIG. 2A , encrypted data 201 is generated by pre-inserting redundant data DD for transmission data TD. Wherein, a plurality of bits of the redundant data DD are inserted into the front end (for example, the end of the least significant bit) of the transmission data TD. Wherein, the number of redundant bits of the redundant data DD may be greater than, equal to or less than the number of bits of the transmission data TD, and there is no certain limit.

In FIG. 2B , encrypted data 202 is generated by post-inserting redundant data DD for transmission data TD. Wherein, a plurality of bits of the redundant data DD are inserted into the position of the rear end (for example, the end of the most significant bit) of the transmission data TD. Likewise, the number of redundant bits of the redundant data DD may be greater than, equal to or less than the number of bits of the transmission data TD, without any limitation.

In FIG. 2C , the encrypted data 203 is generated by interleaving a plurality of redundant bits DD[0]˜DD[N] of the redundant data DD for the transmission data TD. In this embodiment, the transmission data TD has a plurality of bits TD[0]˜TD[N]. The first bit of the redundancy data DD, the redundancy bit DD[0] is inserted between the bits TD[0] and TD[1] of the transmission data TD. A plurality of redundant bits DD[ 1 ]˜DD[N] following the redundant data DD can be sequentially inserted between two adjacent bits of the transmission data TD respectively. In this way, the similarity between the encrypted data 203 and the transmission data TD can be effectively reduced.

In FIG. 2D, the encrypted data 204 is also interleaved by inserting multiple redundant bits DD[0]~DD[N] of the redundant data DD for the transmission data TD. produced. In this embodiment, the first bit (redundant bit DD[0]) of the redundant data DD is inserted before the bit TD[0] of the transmission data TD, and the subsequent multiple redundant bits of the redundant data DD The remaining bits DD[1]~DD[N] can be sequentially inserted between two adjacent bits of the transmission data TD. Similarly, such an insertion action can also effectively reduce the similarity between the encrypted data 204 and the transmission data TD.

Please note here that in the embodiments shown in FIG. 2C and FIG. 2D , only one redundant bit is inserted between adjacent two bits of the transmission data TD. In other embodiments of the present invention, more than one redundant bit can also be inserted between adjacent two bits of the transmission data TD, without any limitation. Moreover, the number of redundant bits inserted between any two adjacent bits in the transmission data TD may be the same or different, and there is no certain limitation.

It is worth mentioning that the pre-insertion, post-insertion and staggered interleaving in the embodiment of the present invention can be applied individually or in combination in generating encrypted data. For example, the controller may pre-insert the redundant bits of the first part of the redundant data into the transmission data; make the second part of the redundant bits of the redundant data post-insert into the transmitted data; and, make The third redundant bit of the redundant data is interleaved into the transmission data. In this way, the complexity of encrypted data can be greatly increased.

Referring to FIG. 3 , FIG. 3 is a schematic diagram illustrating an implementation manner of an encrypted data generation method of an electronic device according to an embodiment of the present invention. In the embodiment of FIG. 3 , the transmission data has, for example, eight bits TD[0]˜TD[7]. Logical values of the bits TD[0]˜TD[7] are, for example, 1, 0, 1, 0, 1, 0, 1, 0, respectively. The redundant data also has eight redundant bits DD[0]~DD[7]. The logical values of the redundant bits DD[0]~DD[7] are, for example, 1, 1, 1, 0, 0, 0, 0, 1. Here, the controller can The inserted insertion type makes the redundant bits DD[0]~DD[7] of the redundant data interleavedly inserted into the eight bits TD[0]~TD[7] of the transmission data respectively, and makes all The generated encrypted data MD has 16 bits, the logical values of which are 1, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1 respectively.

In this embodiment, the logical values of the bits TD[0]-TD[7] of the transmission data and the redundant bits DD[0]-DD[7] are just examples for illustration. The logical values of the bits TD[0]~TD[7] of the transmission data and the redundant bits DD[0]~DD[7] can be arbitrary values without certain restrictions.

From the above description, it can be seen that through the insertion of redundant data into the transmission data, there may be a considerable degree of difference between the transmission data and the transmitted encrypted data MD. Therefore, it can be ensured that the transmission data will not be easily stolen by the outside during the transmission process, ensuring the security of the transmission data.

Please refer to FIG. 4 , which is a schematic diagram of an electronic device according to another embodiment of the present invention. The electronic device 400 includes a controller 410 and a storage device 420 . The encryption and transmission method of the transmission data in this embodiment are the same as those in the embodiment in FIG. 1 , and will not be repeated here. Different from the embodiment in FIG. 1 , a lookup table 421 is set in the storage device 420 . The lookup table 421 is used for storing lookup information 4211 . Here, the lookup table 421 can be any form of memory. The lookup information 4211 in the lookup table 421 can be written by the controller 410 . The controller 410 can dynamically adjust the lookup information 4211 in the lookup table 421 when necessary. It can effectively improve the security of transmitted data.

Please refer to FIG. 5 below. FIG. 5 is a schematic diagram of searching information according to an embodiment of the present invention. Search information 500 includes multiple insertion type information CI1~CIM and Corresponding multiple redundant data to be checked CDD1~CDDM. Each of the to-be-checked insertion type information CI1˜CIM may have a digital value of one or more bits. Each of the redundant data to be checked CDD1˜CDDM can be a digital value with multiple bits. When the search action is executed, the received insertion type information can be compared with multiple insertion type information CI1~CIM to be checked, and the insertion type to be checked that is the same as the input insertion type information can be found. Information (for example, the insertion type information CI1 to be checked). Then, the storage device can output the redundant data CDD1 corresponding to the insertion type information CI1 to be checked, and perform the recovery operation of the transmission data accordingly.

Please refer to FIG. 6 below. FIG. 6 shows a flow chart of the data transmission operation of the embodiment of the present invention. Wherein, in step S610, the controller may set redundant data having a plurality of redundant bits. Moreover, in step S620, the controller may insert redundant bits of redundant data into the transmission data according to the insertion type, and generate encrypted data. And, in step S630, the controller may transmit the encrypted data to the storage device.

The implementation details of the above steps S610-S630 have been described in detail in the above-mentioned multiple embodiments and implementation manners, and will not be described in detail below.

In addition, in the embodiment of the present invention, the storage device can obtain redundant data according to the insertion type applied by the controller based on the lookup information. The storage device can also remove redundant bits and restore transmission data from encrypted data according to the insertion type. The operation details of restoring the transmission data by the storage device are also described in detail in the aforementioned multiple embodiments and implementations, and will not be described in detail below.

To sum up, in the electronic device of the present invention, the controller is configured to insert redundant data into the transmission data according to the insertion type, so as to generate encrypted data. and transmit encrypted data to storage device. In this way, the encrypted data can be prevented from being stolen by the outside world, effectively maintaining the security of the transmitted data. Moreover, the data insertion action adopted by the electronic device of the present invention does not require complex algorithms, which can effectively reduce hardware complexity and power consumption. On the other hand, the storage device in the embodiment of the present invention finds out the inserted redundant data and the inserted position in the encrypted data according to the insertion type. In this way, the storage device can also remove redundant bits for encrypted data and restore the transmission data. Effectively obtain correct transmission data without applying complex algorithms.

100: Electronic device

110: Controller

120: storage device

121: Find information

MD: encrypted data

Claims (10)

A data transmission method, comprising: providing a controller to set a redundant data having a plurality of redundant bits; providing the controller to insert the redundant data into a transmission data according to an insertion type redundant bits, and generate an encrypted data; and make the controller send the encrypted data to a storage device. The data transmission method as described in Claim 1, further comprising: making the storage device obtain the redundant data according to the insertion type based on a search information; and making the storage device obtain the encrypted data according to the insertion type The redundant bits are removed and the transmitted data is restored. The data transmission method according to claim 1, wherein the insertion types include pre-insertion, post-insertion and staggered insertion. The data transmission method as described in Claim 1 further includes: providing insertion type information to the storage device; and enabling the storage device to obtain the insertion type according to the insertion type information. The data transmission method as described in claim item 1, further comprising: setting a lookup table in the storage to store the lookup information, wherein the lookup information includes a plurality of insertion type information to be checked and a plurality of redundant pieces to be checked respectively material. An electronic device includes: a storage device; and a controller coupled to the electronic device, the controller is used for: setting a redundant data with a plurality of redundant bits; inserting the redundant bits of the redundant data in a transmission data according to an insertion type, and generating an encrypted data; and transmitting the encrypted data to the storage device. The electronic device as claimed in item 6, wherein the storage device obtains the redundant data according to the insertion type based on a lookup information, and the storage device removes the redundant data from the encrypted data according to the insertion type and restore the transfer data. The electronic device as claimed in claim 6, wherein the insertion type includes front insertion, rear insertion and staggered insertion. The electronic device as claimed in claim 6, wherein the controller further provides insertion type information to the storage device, and the storage device obtains the insertion type according to the insertion type information. The electronic device as described in claim 6 further includes: a lookup table set in the storage device, wherein the lookup information includes a plurality of insertion type information to be checked and a plurality of redundant data to be checked respectively.

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