TW201911105A - Encryption and decryption system, encryption and decryption method, and non-transitory computer readable recording medium - Google Patents

Abstract

An encryption/decryption system that includes a division module, a disarrangement module and a reconstruction module. The division module is used to slice the file, that requires encryption, into blocks that contains their original block information. The disarrangement module is connected to the division module and is used to randomly disarrange the original blocks to form an encrypted file. The reconstruction module is connected to the division module and disarrangement module, and receives the original block information of the original blocks and the encrypted file. The reconstruction module then reconstructs the original file based on the encrypted file and the original block information it receives.

Description

   Encryption and decryption system, encryption and decryption method, and non-transitory computer-readable recording medium   

The present disclosure relates to an encryption and decryption system, an encryption and decryption method, and a non-transitory computer-readable recording medium, and more particularly, to an encryption and decryption system for an electronic file, an encryption and decryption method, and a non-transitory computer-readable recording medium.

To prevent the file from being used improperly by unauthorized persons, the file is generally encrypted and an encrypted key is given to an authorized person to decrypt the file. However, the conventional file encryption and decryption mechanism is often too complicated after a series of calculations, which causes a certain burden for the encryption and decryption system.

The present disclosure discloses an encryption and decryption system, an encryption and decryption method, and a non-transitory computer-readable recording medium.

An encryption and decryption system of the present disclosure includes a cutting module, an arranging module, and a restoring module. The cutting module is used to cut the file to be encrypted into a plurality of original blocks each having original block information. The arranging module is connected with the cutting module to randomly arrange the original blocks to form an encrypted file. The restoration module is connected to the cutting module and the arrangement module to receive the original block information of the original block and the encrypted file, and restore the encrypted file to the restoration corresponding to the file to be encrypted based on the original block information of the original block. file.

An encryption and decryption method of the disclosed document includes the following steps: receiving a file to be encrypted; cutting the file to be encrypted into a plurality of original blocks each having original block information; randomly arranging the original blocks, randomly arranging the original blocks, and adding the plural numbers The combination of blocks, or the steps of adding blocks and randomly arranged original blocks to form encrypted files; and receiving the original block information and encrypted files of the original blocks, and based on the original block information of the original blocks, The encrypted file is restored to a restored file corresponding to the file to be encrypted.

A non-transitory computer of the present disclosure can read a recording medium. The non-transitory computer can read the recording medium and record at least one program instruction. After the at least one program instruction is loaded into an encryption and decryption system, the following steps are performed: Encrypted files; cut files to be encrypted into multiple original blocks each with original block information; randomly arranged original blocks, a combination of randomly arranged original blocks and plural added blocks, or a combination of added blocks and randomly arranged The step of forming the original block is to form an encrypted file; and to receive the original block information and the encrypted file of the original block, and restore the encrypted file to a restored file corresponding to the file to be encrypted based on the original block information of the original block.

100‧‧‧ encryption and decryption system

110‧‧‧ Conversion Module

120‧‧‧ cutting module

140‧‧‧Array Module

160‧‧‧Restore module

200‧‧‧ encryption and decryption system

210‧‧‧ Conversion Module

220‧‧‧ cutting module

230‧‧‧Add Module

240‧‧‧Array Module

242‧‧‧Combination Unit

244‧‧‧ Break up unit

260‧‧‧Restore Module

300‧‧‧ encryption and decryption system

310‧‧‧ Conversion Module

320‧‧‧ cutting module

330‧‧‧Add Module

340‧‧‧Arrange Module

342‧‧‧Combination unit

344‧‧‧Disruption unit

360‧‧‧ Recovery Module

AB1 ~ AB3‧‧‧The first added block ~ the third added block

ED‧‧‧Encrypted File

H1, H2 ‧‧‧ height

W1, W2‧‧‧Width

OB1 ~ OB9‧‧‧ the first original block ~ the ninth original block

OBI‧‧‧Original Block Information

OD‧‧‧File to be encrypted

RD‧‧‧Restore File

ADS‧‧‧Add Phase

ARS‧‧‧Rank

RCS‧‧‧ Reception Phase

RSS‧‧‧ Restore stage

DVS‧‧‧ cutting stage

URSS‧‧‧Not restored

M100‧‧‧Encryption and decryption method

M200‧‧‧Encryption and decryption method

M300‧‧‧Encryption and decryption method

S120 ~ S180‧‧‧step

S220 ~ S280‧‧‧step

S320 ~ S380‧‧‧step

In order to make the above and other objects, features, advantages, and embodiments of the present disclosure more comprehensible, the description of the drawings is as follows: FIG. 1 is a function of an encryption and decryption system according to an embodiment of the present disclosure. Block diagram.

FIG. 2 is a schematic flowchart of an encryption / decryption method according to an embodiment of the present disclosure.

FIG. 3 is a schematic flowchart of file encryption and decryption using the encryption and decryption system shown in FIG.

FIG. 4A is a schematic diagram of a file to be encrypted that has been cut into 3 × 3 original blocks according to an embodiment of the disclosure document.

FIG. 4B is a schematic diagram corresponding to the position information of the original block shown in FIG. 4A, FIG. 4B, and rotation information.

FIG. 4C is a comparison table between the original block shown in FIG. 4A and the original block information composed of position information, size information, and rotation information shown in FIG. 4B.

FIG. 5 is a functional block diagram of an encryption / decryption system according to another embodiment of the present disclosure.

FIG. 6 is a schematic flowchart of an encryption / decryption method according to another embodiment of the present disclosure.

FIG. 7 is a flowchart of file encryption and decryption using the encryption and decryption system shown in FIG. 5.

FIG. 8 is a functional block diagram of an encryption / decryption system according to another embodiment of the present disclosure.

FIG. 9 is a schematic flowchart of an encryption / decryption method according to another embodiment of the present disclosure.

FIG. 10 is a schematic flowchart of file encryption and decryption using the encryption and decryption system shown in FIG. 8.

The following is a detailed description of the embodiments with the accompanying drawings to better understand the situation of the case, but the examples provided are not intended to limit the scope covered by the case, and the description of the structural operation is not used to limit it. In the order of execution, any structure that reassembles the components and produces a device with equal efficacy is within the scope of this case.

Please refer to Figure 1, Figure 2, and Figure 3 at the same time. FIG. 1 is a functional block diagram of the encryption and decryption system 100 according to an embodiment of the present disclosure document, FIG. 2 is a flowchart of the encryption and decryption method M100 according to an embodiment of the present disclosure document, and FIG. FIG. 1 is a schematic diagram of a file encryption / decryption process performed by the encryption / decryption system 100 shown in FIG. 1.

In this embodiment, the encryption / decryption system 100 can apply the encryption / decryption method M100 to encrypt / decrypt files. Further, the step flow of the encryption and decryption method M100 can record at least one program instruction through a non-transitory readable recording medium. After the at least one program instruction is loaded into the encryption and decryption system 100, the encryption and decryption method M100 is executed to encrypt and decrypt The method includes steps S120, S140, S160, and S180.

The encryption and decryption system 100 includes a cutting module 120, an arranging module 140, and a reduction module 160. The cutting module 120 is connected to the alignment module 140 and the reduction module 160, and the alignment module 140 is connected to the reduction module 160.

In an embodiment, the cutting module 120 may receive the files to be encrypted OD (such as the width W1 is 15 (cm) and the height H1 is 15 (cm)) according to step S120 (such as the width W1 is 15 (cm) and the height H1 is 15 (cm)). Figure 3 shows the reception phase RCS). The cutting module 120 cuts the files to be encrypted OD into nine original blocks each having original block information OBI (as shown in the cutting stage DVS in FIG. 3), which are the first original block OB1 and the second original region, respectively. Block OB2, third original block OB3, fourth original block OB4, fifth original block OB5, sixth original block OB6, seventh original block OB7, eighth original block OB8, and ninth original block OB9, where the shapes of the first original block OB1 to the ninth original block OB9 are square, and the size of the first original block OB1 to the ninth original block OB9 is 5 (cm) x 5 (cm) (that is, the width W2 5 (cm) and height H2 is 5 (cm)). In an embodiment, the original source OS of the file OD to be encrypted may be a picture file as shown in FIG. 3, but this disclosure file is not limited thereto.

In another embodiment, the original source OS of the file OD to be encrypted may be a text file that is not a picture file, a report with interlaced text or a web page, etc. The encryption and decryption system 100 may further include a conversion module 110 for converting the original The content to be encrypted whose source OS is a non-picture file is converted into an image to be encrypted OD after being imaged. In this embodiment, if the original source OS of the file to be encrypted OD is not a picture file (such as a text file, a report with interlaced graphics or a web page, etc., not shown in Figure 3), the conversion module 110 may transfer the original source The OS is converted into a picture format and transmitted to the cutting module 120. The cutting module 120 cuts the OD file to be encrypted after the picture is cut, that is, even if the original source OS to be encrypted is a plain text file, the encryption and decryption system 100 It can also be converted to a file to be encrypted OD through the conversion module 110 for subsequent processing.

It should be noted that the size of the file to be encrypted OD described in this embodiment, the number of original blocks, the shape of the original blocks, and the size of the original blocks are merely examples, and are not limited thereto.

Further, the first original block OB1 to the ninth original block OB9 have corresponding original block information OBI, and the original block information OBI includes the position information of the first original block OB1 to the ninth original block OB9. PI uses size information SI and rotation information RI, where position information PI, size information SI, and rotation information RI indicate the positions, sizes, and rotation angles of the first original block OB1 to the ninth original block OB9, respectively.

In order to explain the original block information OBI more clearly, please refer to FIG. 4A, FIG. 4B, and FIG. 4C together. FIG. 4A is a schematic diagram of an OD file to be encrypted that has been cut into 3 × 3 original blocks (ie, the first original block OB1 to the ninth original block OB9) according to an embodiment of the disclosure document, and FIG. 4B is a corresponding diagram. A schematic diagram of position information PI, size information SI, and rotation information RI of the first to ninth original blocks OB1 to OB9 shown in FIG. 4A. FIG. 4C is the first original block OB1 shown in FIG. 4A. The comparison table between the ninth original block OB9 and the original block information OBI composed of the position information PI, the size information SI, and the rotation information RI shown in FIG. 4B.

As shown in Figure 4A, the size of the file OD to be encrypted is 15 (cm) x 15 (cm), that is, the width W1 and the height H1 are both 15 (cm), and the file OD to be encrypted is cut into 3X3 square original areas. Blocks (ie, the first original block OB1 to the ninth original block OB9), so the size of each original block is 5 (cm) x 5 (cm) as shown in Figure 4B, that is, the width W2 and height H2 are both 5 (cm).

Then, the position information PI, size information SI, and rotation information RI of each original block are defined, and then the position information PI, size information SI, and rotation information RI are combined to define the original block information OBI. In detail, the position information PI can be expressed by the coordinates of the two-dimensional coordinate system, the size data SI can be expressed by the width and height of the cut original block, and the rotation information RI can be expressed by the rotation angle of the cut original block.

Specifically, as shown in FIG. 4B, the two-dimensional coordinate system is first established on the to-be-encrypted file OD that has been cut into 3X3 original blocks, and then the center point coordinate of the fifth original block OB5 is defined as (0, 0), so the first original block OB1, the second original block OB2, the third original block OB3, the fourth original block OB4, the sixth original block OB6, the seventh original block OB7, and the eighth original region The coordinates of the center points of the block OB8 and the ninth original block OB9 are (-5,5), (0,5), (5,5), (-5,0), (5,0), (-5 , -5), (0, -5), (5, -5). Thereby, the position information PI of the first original block OB1 to the ninth original block OB9 can be obtained.

In addition, since the width W2 of the first original block OB1 to the ninth original block OB9 is 5 (cm) and the height H2 is 5 (cm), the first original block OB1 to the ninth original block OB9 can be obtained. Size information SI.

Furthermore, the first original block OB1 to the ninth original block OB9 have their centers as the rotation centers, respectively. Since the first original block OB1 to the ninth original block OB9 are not rotated compared to the respective rotation centers, the first The rotation angles of an original block OB1 to a ninth original block OB9 are all 0 degrees.

The original block information OBI of the first original block OB1 to the ninth original block OB9 may be represented by a matrix including position information PI, size information SI, and rotation information RI. In this embodiment, the original block information OBI of the first original block OB1 to the ninth original block OB9 may be expressed as [x-axis position, y-axis position, width, height, rotation angle].

As shown in FIG. 4C, the first original block OB1 to the ninth original block OB9 and their corresponding original block information OBI are arranged.

Taking the first original block OB1 as an example, the position of the center point of the first original block OB1 is (-5,5), and this coordinate can be used as the position information PI of the first original block OB1; the first original block The width W2 and height H2 of OB1 are both 5 (cm), and this cut size can be used as the size information SI of the first original block OB1; the rotation angle of the first original block OB1 is 0 degrees, and this rotation angle can be used as Rotation information RI of the first original block OB1. Next, the coordinates of the position information PI, the width and height of the size information SI, and the rotation angle of the rotation information RI are combined. Therefore, the original block information OBI of the first original block OB1 can be defined as [-5,5, 5,5,0].

The original block information OBI of the second original block OB2 to the ninth original block OB9 is defined in the same way as the original block information OBI of the first original block OB1 and is defined as [0,5,5,5, 0], [5,5,5,5,0], [-5,0,5,5,0], [0,0,5,5,0], [5,0,5,5,0 ], [-5, -5,5,5,0], [0, -5,5,5,0], and [5, -5,5,5,0].

It should be noted that the definition method of the original block information OBI of the first original block OB1 to the ninth original block OB9 is merely an example, and is not limited thereto.

Please go back to Figure 1, Figure 2, and Figure 3. The arrangement module 140 randomly arranges the first original block OB1 to the ninth original block OB9 according to step S140 (as shown in the arrangement stage ARS in FIG. 3). That is, the positions and rotation angles of the first original block OB1 to the ninth original block OB9 will be rearranged.

Specifically, the arranging module 140 first rearranges the positions of the first original block OB1 to the ninth original block OB9; then, it rearranges the first original block OB1 to the ninth original block OB9 from the rearranged positions In the process, several original blocks are randomly selected, and the selected original blocks are rotated. Alternatively, the arranging module 140 may first randomly select several original blocks from the first original block OB1 to the ninth original block OB9, and rotate the selected original blocks; then, the rotated and unrotated The positions of the first original block OB1 to the ninth original block OB9 are rearranged.

In this embodiment, the positions of the first original block OB1 to the ninth original block OB9 are rearranged. In addition, the rotated original block is exemplified by the second original block OB2 and the seventh original block OB7. That is, the rotation angles of the second original block OB2 and the seventh original block OB7 are rearranged. For example, the second original block OB2 is rotated clockwise by 90 degrees at its center, and the seventh original block OB7 is rotated at its center. Rotate 180 degrees clockwise.

It should be noted that the original block being rotated and its rotation angle are only examples, and are not limited thereto.

In detail, the position of the first randomly arranged original block OB1 is located in the original fifth original block OB5, and the position of the randomly arranged second original block OB2 is located in the original first original block OB1. Position, the position of the third randomly arranged original block OB3 is located in the original ninth original block OB9, and the position of the randomly arranged fourth original block OB4 is located in the original seventh original block OB7, The randomly arranged fifth original block OB5 is located in the original third original block OB3, and the randomly arranged sixth original block OB6 is located in the original eighth original block OB8. The position of the seventh original block OB7 is located in the original sixth original block OB6, and the position of the randomly arranged eighth original block OB8 is located in the original fourth original block OB4. The position of the ninth original block OB9 is located at the position of the original second original block OB2.

In addition, the original block information OBI of the first original block OB1 to the ninth original block OB9 is not changed due to random arrangement, that is, the first original block OB1 to the ninth original region are randomly arranged. Block OB9 still retains its original block information OBI.

The randomly arranged first original block OB1 to the ninth original block OB9 form the encrypted file ED as shown in the arrangement stage ARS in FIG. 3 according to step S160, and the size of the encrypted file ED is 15 (cm) x 15 (cm ). In this embodiment, the format of the encrypted file ED is a picture format.

The restoration module 160 receives the original block information OBI of the first original block OB1 to the ninth original block OB9 according to step S180 (such as [-5,5,5,5,0], [0,5,5,5 , 0], [5,5,5,5,0], [-5,0,5,5,0], [0,0,5,5,0], [5,0,5,5, 0], [-5, -5,5,5,0], [0, -5,5,5,0] and [5, -5,5,5,0]) and the encrypted file ED, based on The original block information OBI of the first original block OB1 to the ninth original block OB9 and the encrypted file ED restore the encrypted file ED to a restored file RD as shown in the restoration stage RSS in FIG. 3.

In detail, after receiving the original block information OBI of the first original block OB1 to the ninth original block OB9 and the encrypted file ED, the restoration module 160 uses the size information SI in the original block information OBI, such as the original The width W2 and height H2 of the block are both 5 (cm), and the encrypted file ED is cut into 3 × 3 blocks. Then, the position information PI in the original block information OBI is used. For example, the coordinates of the center points of the first original block OB1 to the ninth original block OB9 are (-5, 5), (0, 5), and (5). , 5), (-5,0), (0,0), (5,0), (-5, -5), (0, -5), and (5, -5), and will be randomly arranged The positions of the first original block OB1 to the ninth original block OB9 are rearranged to the positions of the first original block OB1 to the ninth original block OB9 that have not been randomly arranged. Finally, according to the rotation information RI, the rotated second original block OB2 and the seventh original block OB7 are restored to a rotation angle of the second original block OB2 rotated 90 degrees clockwise to 0 degrees, and The rotation angle of the seventh original block OB7 rotated 180 degrees clockwise is reduced to 0 degrees to form a restored file RD as shown in the restoration stage RSS in FIG. 3, where the pattern content of the restored file RD will correspond (in an implementation The example is exactly the same as) the original OD file to be encrypted.

In short, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is obtained, the encrypted file ED can be decrypted and restored to a restored file RD corresponding to the file OD to be encrypted. However, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is not obtained, the encrypted file ED cannot be decrypted, so only the encryption shown in the unrecovered stage URSS in FIG. 3 can be output Archive ed. Furthermore, because the content of the pattern of the encrypted file ED (the pattern of the smiley face) is too different from the original content of the file OD to be encrypted (the unrecognizable pattern), it is difficult for unauthorized persons to obtain the original from the encrypted file ED. The OD of the file to be encrypted, thereby achieving the purpose of protecting the OD of the file to be encrypted.

In another embodiment, if the original source OS of the file OD to be encrypted is a non-picture file, after step S180, the method further includes a step of restoring the restored file RD belonging to the picture format to the original format, such as the file OD to be encrypted. When the original source OS is a text file, after step S180, the restored file RD belonging to the picture format will be restored to a text file.

Please refer to Figures 5, 6, and 7 at the same time. FIG. 5 is a functional block diagram of the encryption and decryption system 200 according to another embodiment of the present disclosure. FIG. 6 is a flowchart of the encryption and decryption method M200 according to one embodiment of the present disclosure. FIG. 7 is A schematic flowchart of file encryption and decryption using the encryption and decryption system 200 shown in FIG. 5.

In this embodiment, the encryption / decryption system 200 may apply the encryption / decryption method M200 to encrypt / decrypt files. Further, the step flow of the encryption and decryption method M200 can record at least one program instruction through a non-transitory readable recording medium. After the at least one program instruction is loaded into the encryption and decryption system 200, the encryption and decryption method M200 is executed to encrypt and decrypt The method includes steps S220, S230, S240, S260, and S280.

The encryption and decryption system 200 includes a cutting module 220, an adding module 230, an arranging module 240, and a reducing module 260. The arrangement module 240 includes a combination unit 242 and a dispersing unit 244 that are connected to each other. The combination unit 242 of the arrangement module 240 is connected to the cutting module 220 and the addition module 230. The disassembly unit 244 of the arrangement module 240 is to restore The module 260 is connected. The reduction module 260 is connected to the cutting module 220. In another embodiment, the encryption and decryption system 200 may further include a conversion module 210. The conversion module 210 is connected to the cutting module 220. In addition, since the conversion module 210 is substantially the same in structure, function, and application timing as the conversion module 110 of the encryption / decryption system 100, it will not be repeated here.

The cutting module 220 receives the file OD to be encrypted according to step S220, and cuts the file OD to be encrypted into nine original blocks each having original block information OBI. The further description of the cutting module 220 is substantially the same as the cutting module 120 of the encryption and decryption system 100 (as shown in the receiving stage RCS and the cutting stage DVS in FIG. 7), so it will not be repeated here.

The adding module 230 adds a first added block AB1, a second added block AB2, and a third added block AB3 according to step S230, wherein the first added block AB1, the second added block AB2, and the third added block AB3 The shape is square, and the sizes of the first added block AB1, the second added block AB2, and the third added block AB3 and the sizes of the first original block OB1 to the ninth original block OB9 are 5 (cm). x5 (cm).

It should be noted that the number, shape, and size of the added blocks described in this embodiment are merely examples, and are not limited thereto.

The combination unit 242 of the arrangement module 240 combines the first original block OB1 to the ninth original block OB9 generated from the cutting module 220 and the first added block AB1 to the third added block AB3 generated from the adding module 230. Put together, that is, the first added block AB1 is right next to the third original block OB3, the second added block AB2 is right next to the sixth original block OB6, and the third added block AB3 is right next to the ninth The right side of the original block OB9 (as shown in the add stage ADS in Figure 7).

It should be noted that the locations of the added blocks described in this embodiment are merely examples, and are not limited thereto.

The breaking unit 244 of the arrangement module 240 randomly arranges and combines the first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3 according to step S240 (as shown in FIG. 7). The permutation stage is shown in ARS). That is, the positions and rotation angles of the first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3 will be rearranged.

Specifically, the arranging module 140 rearranges the positions of the first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3 first, and then rearranges the positions from the positions. Among the first original block OB1 to the ninth original block OB9, several original blocks and added blocks are randomly selected, and the selected original blocks and added blocks are rotated. Alternatively, the arrangement module 140 may first randomly select several original blocks from the first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3, and rotate the selected block. The original block and the added block; then, the positions of the rotated first and ninth original blocks OB1 to OB9 and the first added block AB1 to third added block AB3 are rearranged .

In this embodiment, the positions of the first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3 are rearranged; moreover, the rotated original block The second original block OB2, the seventh original block OB7, the second added block AB2, and the third added block AB3 are examples, that is, the second original block OB2, the seventh original block OB7, and the second added block The rotation angles of AB2 and the third added block AB3 are rearranged. For example, the second original block OB2 is rotated 90 degrees clockwise at its center, the seventh original block OB7 is rotated 180 degrees clockwise at its center, and the second The added block AB2 is rotated 270 degrees clockwise at its center, and the third original block AB3 is rotated 90 degrees clockwise at its center.

It should be noted that the rotated original block and the added block and their rotation angles are only examples, and are not limited thereto.

In detail, the position of the first randomly arranged original block OB1 is located in the original fifth original block OB5, and the position of the randomly arranged second original block OB2 is located in the original first original block OB1. Position, the position of the third randomly arranged original block OB3 is located at the original ninth original block OB9, and the position of the randomly arranged fourth original block OB4 is located at the original second added block AB2, The randomly arranged fifth original block OB5 is located at the original third added block AB3, and the randomly arranged sixth original block OB6 is located at the original eighth original block OB8. The position of the seventh original block OB7 is located in the original sixth original block OB6, and the position of the randomly arranged eighth original block OB8 is located in the original fourth original block OB4. The position of the ninth original block OB9 is located in the original second original block OB2, and the position of the randomly added first added block AB1 is located in the original third original block OB3, and the randomly arranged second add The position of the added block AB2 is located at the original seventh original block OB7, and the position of the third added block AB3, which is randomly arranged, is located at the original first added block AB1.

It should be noted that the original block information OBI of the first original block OB1 to the ninth original block OB9 is not changed due to random arrangement, that is, the first original block OB1 to Nine original blocks OB9 still retains its original block information OBI.

The randomly arranged first original block OB1 to the ninth original block OB9 and the first added block AB1 to the third added block AB3 form the encrypted file ED as shown in the arrangement stage ARS of FIG. 7 according to step S260, The size of the encrypted file ED is 15 (cm) x 20 (cm).

The restoration module 260 receives the original block information OBI of the first original block OB1 to the ninth original block OB9 (such as [-5,5,5,5,0], [0,5,5,5] according to step S280. , 0], [5,5,5,5,0], [-5,0,5,5,0], [0,0,5,5,0], [5,0,5,5, 0], [-5, -5,5,5,0], [0, -5,5,5,0] and [5, -5,5,5,0]) and the encrypted file ED, based on The original block information OBI of the first original block OB1 to the ninth original block OB9 and the encrypted file ED restore the encrypted file ED to a restored file RD as shown in the restoration stage RSS in FIG. 7.

In detail, after receiving the original block information OBI and the encrypted file ED of the first original block OB1 to the ninth original block OB9, the restoration module 260, according to the size information SI in the original block information OBI, such as the original The width W2 and height H2 of the block are both 5 (cm), and the encrypted file ED is cut into 3 × 3 blocks. Then, the position information PI in the original block information OBI is used. For example, the coordinates of the center points of the first original block OB1 to the ninth original block OB9 are (-5, 5), (0, 5), and (5). , 5), (-5,0), (0,0), (5,0), (-5, -5), (0, -5), and (5, -5), and will be randomly arranged Rearrange the positions of the first original block OB1 to the ninth original block OB9 to the positions of the first original block OB1 to the ninth original block OB9 that have not been randomly arranged, and skip or delete the added first addition Block AB1 to third add block AB3. Finally, according to the rotation information RI, the rotated second original block OB2 and the seventh original block OB7 are restored to a rotation angle of the second original block OB2 rotated 90 degrees clockwise to 0 degrees, and The rotation angle of the seventh original block OB7, which is rotated 180 degrees clockwise, is reduced to 0 degrees to form a restored file RD as shown in the restore stage RSS in FIG. 7, where the pattern content of the restored file RD will correspond (in an implementation The example is exactly the same as) the original OD file to be encrypted.

In short, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is obtained, the encrypted file ED can be decrypted and restored to a restored file RD corresponding to the file OD to be encrypted. However, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is not obtained, the encrypted file ED cannot be decrypted, so only the encryption shown in the unrecovered stage URSS in FIG. 7 can be output Archive ed. Furthermore, because the content of the pattern of the encrypted file ED (the pattern of the smiling face) is too different from the original pattern of the file OD to be encrypted (the unrecognizable pattern), it is difficult for unauthorized persons to obtain the original The OD of the file to be encrypted, thereby achieving the purpose of protecting the OD of the file to be encrypted.

In another embodiment, if the original source OS of the file to be encrypted OD is a non-picture file, after step S280, the method further includes a step of restoring the restored file RD belonging to the picture format to the original format, such as the file to be encrypted OD When the original source OS is a text file, after step S280, the restored file RD belonging to the picture format will be restored to a text file.

Please refer to Figures 8, 9 and 10 at the same time. FIG. 8 is a functional block diagram of the encryption and decryption system 300 according to another embodiment of the present disclosure, and FIG. 9 is a schematic flowchart of the encryption and decryption method M300 according to an embodiment of the present disclosure. FIG. 10 is A schematic flowchart of file encryption and decryption using the encryption and decryption system 300 shown in FIG. 8.

In this embodiment, the encryption and decryption system 300 can apply the encryption and decryption method M300 to encrypt and decrypt the files. Further, the step flow of the encryption and decryption method M300 can record at least one program instruction through a non-transitory readable recording medium. After the at least one program instruction is loaded into the encryption and decryption system 300, the encryption and decryption method M300 is executed to perform encryption and decryption. The method includes steps S320, S330, S340, S360, and S380.

The encryption and decryption system 300 includes a cutting module 320, an adding module 330, an arranging module 340, and a reduction module 360. The arrangement module 340 includes a combination unit 342 and a shattering unit 344 connected to each other. The combination unit 342 of the arrangement module 340 is connected to the addition module 330 and the reduction module 360. The breaking unit 344 of the arrangement module 340 is connected to the cutting module 320. The reduction module 360 is connected to the cutting module 320. In another embodiment, the encryption and decryption system 300 may further include a conversion module 310, and the conversion module 310 is connected to the cutting module 320. In addition, since the conversion module 310 is substantially the same in structure, function, and application timing as the conversion module 110 of the encryption / decryption system 100, it will not be repeated here.

The cutting module 320 receives the file OD to be encrypted according to step S320, and cuts the file OD to be encrypted into nine original blocks each having original block information OBI. The further description of the cutting module 320 is substantially the same as the cutting module 120 of the encryption and decryption system 100 (as shown in the receiving stage RCS and the cutting stage DVS in FIG. 10), so it will not be described further.

The adding module 330 adds a first added block AB1, a second added block AB2, and a third added block AB3 according to step S330, wherein the first added block AB1, the second added block AB2, and the third added block AB3 The shape is square, and the sizes of the first added block AB1, the second added block AB2, and the third added block AB3 and the sizes of the first original block OB1 to the ninth original block OB9 are 5 (cm). x5 (cm).

It should be noted that the number, shape, and size of the added blocks described in this embodiment are merely examples, and are not limited thereto.

First, the shattering unit 344 of the arrangement module 340 randomly arranges the first original block OB1 to the ninth original block OB9 (as shown in the arrangement stage ARS in FIG. 10), because the ARS in the tenth arrangement stage and FIG. 3 The arrangement phase of ARS is roughly the same, so the random arrangement of the first original block OB1 to the ninth original block OB9 is not repeated.

The combining unit 342 of the arranging module 340 performs the first adding block AB1 to the third adding block AB3 according to step S340 (the first adding block AB1 to the third adding block shown in the adding stage ADS in FIG. 7). The same as AB3) is combined with the randomly arranged first original block OB1 to the ninth original block OB9, that is, the first added block AB1 is immediately to the right of the third original block OB3, and the second added block AB2 It is immediately adjacent to the right side of the fifth original block OB5, and then rotated 270 degrees clockwise at its center (or, the second added block AB2 is first rotated 270 degrees clockwise at its center, and then immediately to the right of the fifth original block OB5. ), The third added block AB3 is immediately next to the right side of the seventh original block OB7, and then rotated 90 degrees clockwise at its center (or, the third added block AB3 is first rotated 90 degrees clockwise at its center, and then immediately adjacent The fifth original block OB5 is to the right) (as shown in the add stage ADS of Figure 10).

It should be noted that the position of the added block, the rotated added block, and its rotation angle described in this embodiment are merely examples, and are not limited thereto.

The first added block AB1 to the third added block AB3 and the randomly arranged first original block OB1 to the ninth original block OB9 form the encrypted file ED as shown in FIG. 10 according to step S360, and the encrypted file ED The dimensions are 15 (cm) x20 (cm).

The restoration module 360 receives the original block information OBI of the first original block OB1 to the ninth original block OB9 according to step S380 (such as [-5,5,5,5,0], [0,5,5,5 , 0], [5,5,5,5,0], [-5,0,5,5,0], [0,0,5,5,0], [5,0,5,5, 0], [-5, -5,5,5,0], [0, -5,5,5,0] and [5, -5,5,5,0]) and the encrypted file ED, based on The original block information OBI of the first original block OB1 to the ninth original block OB9 and the encrypted file ED restore the encrypted file ED to a restored file RD as shown in the restoration stage RSS in FIG. 10.

In detail, after the restoration module 360 receives the original block information OBI and the encrypted file ED of the first original block OB1 to the ninth original block OB9, according to the size information SI in the original block information OBI, such as the original The width W2 and height H2 of the block are both 5 (cm), and the encrypted file ED is cut into 3 × 3 blocks. Then, the position information PI in the original block information OBI is used. For example, the coordinates of the center points of the first original block OB1 to the ninth original block OB9 are (-5, 5), (0, 5), and (5). , 5), (-5,0), (0,0), (5,0), (-5, -5), (0, -5), and (5, -5), and will be randomly arranged Rearrange the positions of the first original block OB1 to the ninth original block OB9 to the positions of the first original block OB1 to the ninth original block OB9 that have not been randomly arranged, and skip or delete the added first addition Block AB1 to third add block AB3. Finally, according to the rotation information RI, the rotated second original block OB2 and the seventh original block OB7 are restored to a rotation angle of the second original block OB2 rotated 90 degrees clockwise to 0 degrees, and The rotation angle of the seventh original block OB7, which is rotated 180 degrees clockwise, is reduced to 0 degrees to form a restored file RD as shown in the restore stage RSS of FIG. 10, where the pattern content of the restored file RD will correspond (in an implementation The example is exactly the same as) the original OD file to be encrypted.

In short, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is obtained, the encrypted file ED can be decrypted and restored to a restored file RD corresponding to the file OD to be encrypted. However, if the original block information OBI of the first original block OB1 to the ninth original block OB9 is not obtained, the encrypted file ED cannot be decrypted, so only the encryption shown in the unrecovered stage URSS in FIG. 10 can be output Archive ed. Furthermore, because the content of the pattern of the encrypted file ED (the pattern of the smiling face) is too different from the original pattern of the file OD to be encrypted (the unrecognizable pattern), it is difficult for unauthorized persons to obtain the original The OD of the file to be encrypted, thereby achieving the purpose of protecting the OD of the file to be encrypted.

In another embodiment, if the original source OS of the file to be encrypted OD is a non-picture file, after step S380, the method further includes a step of restoring the restored file RD belonging to the picture format to the original format, such as the file to be encrypted OD When the original source OS is a text file, after step S380, the restored file RD belonging to the picture format will be restored to a text file.

The above-mentioned encryption and decryption systems 100 to 300 and the encryption and decryption methods M100 to M300 use a simple and highly protective cutting and reorganization encryption and decryption mechanism for file encryption and decryption; in addition, the encryption and decryption systems 100 to 300 and the encryption and decryption methods M100 to The M300 can also be used in any field that requires encryption and decryption of files, such as web pages. When applied to the field of webpages, cutting and recombining techniques can be accomplished using Cascading Style Sheets (CSS) layout technology, but not limited to this.

In summary, the encryption / decryption system, encryption / decryption method, and non-transitory computer-readable recording medium of the present disclosure can cut a file to be encrypted into a plurality of original blocks by a cutting module, and arrange a plurality of blocks by the arranging module. The original blocks are randomly arranged, and the file to be encrypted can be encrypted into an encrypted file, and the position of the randomly arranged original block can be restored to the original position by the restoration module. Therefore, the encrypted file is restored to correspond to the file to be encrypted. Restore files to prevent unauthorized use of files to be encrypted, such as downloading or printing, thereby increasing the protection of encrypted files.

Although this case has been disclosed as above with examples, it is not intended to limit this case. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of this case. Therefore, the protection of this case The scope shall be determined by the scope of the attached patent application.

Claims (10)

    An encryption and decryption system includes: a cutting module for cutting a file to be encrypted into a plurality of original blocks each having an original block information; an array module connected to the cutting module for Randomly arranging the original blocks to form an encrypted file; and a restoration module connected to the cutting module and the arranging module to receive the original block information of the original blocks and the encryption File, and restore the encrypted file to a restored file corresponding to the file to be encrypted based on the original block information of the original blocks.         The encryption and decryption system according to claim 1, wherein the original block information includes position information, size information, and rotation information.         The encryption / decryption system according to claim 1, further comprising an adding module, which is connected to the arranging module to add a plurality of adding blocks to combine with the original blocks. The arranging module is used to randomly The added blocks and the original blocks are arranged to form the encrypted file, and the restoration module is used to receive the original block information of the original blocks and the encrypted file, and based on the original block's The original block information restores the encrypted file into the restored file.         The encryption / decryption system according to claim 1, further comprising an adding module connected to the arrangement module for adding a plurality of added blocks to combine with the randomly arranged original blocks to form the encryption. File, the restoration module is used to receive the original block information of the original blocks and the encrypted file, and restore the encrypted file to the restored file based on the original block information of the original blocks.         An encryption and decryption method includes the following steps: receiving a file to be encrypted; cutting the file to be encrypted into a plurality of original blocks each having an original block information; randomly arranging the original blocks and randomly arranging the original regions A combination of a block and a plurality of added blocks, or a combination of the added blocks and the randomly arranged original blocks; forming an encrypted file; and receiving the original block information of the original blocks and the encrypted file And based on the original block information of the original blocks, restore the encrypted file to a restored file corresponding to the file to be encrypted.         According to the encryption and decryption method described in claim 5, in the step of cutting the file to be encrypted into a plurality of original blocks each having the original block information, and a combination of randomly arranging the original blocks and a plurality of added blocks The steps further include a step of adding a plurality of added blocks.         The encryption and decryption method described in claim 5, in the step of cutting the file to be encrypted into a plurality of original blocks each having an original block information, and combining the added blocks and the randomly arranged original regions The steps of the block further include a step of adding a plurality of added blocks.         A non-transitory computer can read a recording medium. The non-transitory computer can read a recording medium and record at least one program instruction. After the at least one program instruction is loaded into an encryption and decryption system, the following steps are performed: receiving a file to be encrypted; Cutting the file to be encrypted into a plurality of original blocks each having the original block information; randomly arranging the original blocks, randomly arranging the original blocks and a plurality of added blocks, or combining the added regions Block and the randomly arranged original blocks; forming an encrypted file; and receiving the original block information of the original blocks and the encrypted file, and based on the original block information of the original blocks The encrypted file is restored into a restored file corresponding to the file to be encrypted.         The non-transitory computer-readable recording medium as described in claim 8, in the step of cutting the file to be encrypted into the original blocks each having the original block information and randomly arranging the original blocks and the Steps such as the combination of adding blocks further include steps of adding such adding blocks.         The non-transitory computer-readable recording medium as described in claim 8, in the steps and combinations of cutting the to-be-encrypted file into the original blocks each having original block information, the added blocks are randomly arranged The steps of the original blocks further include the steps of adding the added blocks.