CN204044830U - The USB encryption device of embedded TCM chip - Google Patents
The USB encryption device of embedded TCM chip Download PDFInfo
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- CN204044830U CN204044830U CN201420453736.XU CN201420453736U CN204044830U CN 204044830 U CN204044830 U CN 204044830U CN 201420453736 U CN201420453736 U CN 201420453736U CN 204044830 U CN204044830 U CN 204044830U
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Abstract
A USB encryption device for embedded TCM chip, comprising: receive the data-signal of external unit transmission and the USB interface of encryption and decryption signal; Transponder that be connected with described USB interface, that according to described encryption and decryption signal, described data-signal is transmitted to conversion processor or TCM deciphering chip; That be connected with described transponder, that described data-signal is changed conversion processor; That be connected with described conversion processor, that the data-signal after changing is encrypted TCM encryption chip, described TCM encryption chip is also connected with described USB interface, sends the data-signal after encryption to described USB interface; That be connected with described transponder, that described data-signal is decrypted TCM deciphering chip; Reduction treater that be connected with described TCM deciphering chip, that reduce to the data-signal after deciphering, described reduction treater is also connected with described USB interface, sends the data-signal after reduction to described USB interface.The USB encryption device of above-mentioned embedded TCM chip can generate and crack the high encrypted data signal of difficulty.
Description
Technical field
The utility model relates to USB field, particularly relates to a kind of USB encryption device of embedded TCM chip.
Background technology
USB is the abbreviation of English Universal Serial Bus (USB (universal serial bus)), and its Chinese is referred to as " logical get lines crossed ", is an external bus standard, for connection and the communication of specification computer and external unit.The plug and play of USB interface support equipment and warm connection function.USB device is the general designation of the device with USB interface.The most frequently used USB device is USB flash drive, its English " USB flash disk " by name.USB flash drive is a kind of miniature high power capacity mobile storage product without the need to phisical drive using USB interface, is connected, can realizes plug and play by USB interface with computer.But, not yet there is the USB device that can be encrypted data-signal and generate encrypted data signal at present.
Utility model content
Based on this, be necessary to provide a kind of USB encryption device generating the embedded TCM chip cracking the high encrypted data signal of difficulty.
A USB encryption device for embedded TCM chip, comprising:
Receive the data-signal of external unit transmission and the USB interface of encryption and decryption signal;
Transponder that be connected with described USB interface, that according to described encryption and decryption signal, described data-signal is transmitted to conversion processor or TCM deciphering chip;
That be connected with described transponder, that described data-signal is changed conversion processor;
That be connected with described conversion processor, that the data-signal after changing is encrypted TCM encryption chip, described TCM encryption chip is also connected with described USB interface, sends the data-signal after encryption to described USB interface;
That be connected with described transponder, that described data-signal is decrypted TCM deciphering chip;
Reduction treater that be connected with described TCM deciphering chip, that reduce to the data-signal after deciphering, described reduction treater is also connected with described USB interface, sends the data-signal after reduction to described USB interface.
Wherein in an embodiment, described conversion processor is connected by UART, SPI or I2C bus with described TCM encryption chip.
Wherein in an embodiment, described TCM deciphering chip is connected by UART, SPI or I2C bus with described reduction treater.Wherein in an embodiment, described device also comprises signal return circuit, described TCM encryption chip is connected by described signal return circuit with described USB interface, and described signal return circuit sends the data-signal after described TCM encryption chip encryption to described USB interface.
Wherein in an embodiment, described reduction treater is connected by described signal return circuit with described USB interface, and described signal return circuit sends the data-signal after described reduction treater reduction to described USB interface.
In the USB encryption device of above-mentioned embedded TCM chip, USB interface, transponder, conversion processor are connected successively with TCM encryption chip, the original data signal received from external unit is carried out changing and encrypting, and USB interface, transponder, TCM deciphering chip are connected successively with reduction treater, data message after the encryption received from external unit is decrypted and reduces, can prevent the intermediate processing data of encryption process from being intercepted and captured by Malware, improve the difficulty cracking the data-signal of the USB encryption engine encrypts of this embedded TCM chip; And could can only be deciphered by the USB encryption device of this embedded TCM chip by the data-signal that the USB encryption engine encrypts of this embedded TCM chip is crossed, almost can reach the effect that can not be cracked by miscellaneous equipment or software; And transponder is connected by conversion processor with TCM encryption chip, thus original data signal is first changed by conversion processor before encryption, and TCM deciphering chip and USB interface are connected successively by reduction treater, data-signal after deciphering must also will be undertaken reducing by reduction treater and just can become original data signal again, thus more improve the data-signal after encryption crack difficulty.
Accompanying drawing explanation
Fig. 1 is the structural representation of the USB encryption device of embedded TCM chip in an embodiment;
Fig. 2 is the structural representation of the USB encryption device of embedded TCM chip in another embodiment;
Fig. 3 is the structural representation of the USB encryption device of embedded TCM chip in another embodiment.
Embodiment
As shown in Figure 1, a kind of USB encryption device of embedded TCM chip, comprising: receive the data-signal of external unit transmission and the usb 10 of encryption and decryption signal; Transponder 20 that be connected with usb 10, that according to encryption and decryption signal, data-signal is transmitted to conversion processor 30 or TCM deciphering chip; That be connected with transponder 20, that data-signal is changed conversion processor 30; Be connected with conversion processor 30, TCM encryption chip 40, the TCM encryption chip 40 that the data-signal after changing is encrypted also is connected with USB interface 20, to USB interface 20 send encryption after data-signal; That be connected with transponder 20, that data-signal is decrypted TCM deciphering chip 50; Reduction treater 60 that be connected with TCM deciphering chip 50, that reduce to the data-signal after deciphering, reduction treater 60 is also connected with USB interface 20, sends the data-signal after reduction to USB interface 20.Data-signal after reduction is returned to external unit by USB interface.
In one embodiment, TCM (credible password module, Trusted Cryptography Module) is the hardware module of credible calculating platform, provides crypto-operation function.Password Management office of credible calculating platform (trusted computing platform) Objective Concept country proposes, and it builds in computing systems, for realizing the support system of trust computing function.
In one embodiment, conversion processor 30 and TCM encryption chip 40 are by UART (Universal Asynchronous Receiver/Transmitter, asynchronous receiving-transmitting transmitter), SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) or I2C (Inter-Integrated Circuit) bus connect.In one embodiment, TCM deciphering chip 50 is also connected by UART, SPI or I2C bus with reduction treater 60.
In embodiment herein, the process that conversion processor 30 pairs of data-signals are changed and the process contrary that reduction treater 60 pairs of data-signals reduce.
In one embodiment, as shown in Figure 2, conversion processor 30 comprises incorrect order circuit 302 and permutation circuit 304, and reduction treater 60 comprises inverse permutation circuit 602 and inverse incorrect order circuit 604, wherein:
Incorrect order circuit 302 is connected with transponder 20, carries out incorrect order process to data-signal.Such as, data-signal is divided into multistage, exchanges the order between each section.Permutation circuit 304 is connected with incorrect order circuit 302, carries out low and high level replacement Treatment to the data-signal after incorrect order.Such as, the high level of a certain section in data-signal is replaced as low level, low level is replaced as high level.TCM encryption chip 40 is connected with permutation circuit 304, is encrypted the data-signal after displacement.Inverse permutation circuit 602 is connected with TCM deciphering chip 50, carries out inverse permutation process to the data-signal after deciphering.Inverse permutation circuit 602 pairs of data-signals carry out the process contrary that the process of inverse permutation process and permutation circuit 304 pairs of data-signals carry out replacement Treatment.Inverse incorrect order circuit 604 is connected with inverse permutation circuit 602, carries out inverse incorrect order process to the data-signal after inverse permutation; Inverse incorrect order circuit 604 is also connected with USB interface 20, data-signal after sending inverse incorrect order process to USB interface.Inverse incorrect order circuit 604 pairs of data-signals carry out the process contrary that the process of inverse incorrect order process and incorrect order circuit 302 pairs of data-signals carry out incorrect order process.
In embodiment herein, the process that TCM encryption chip 40 pairs of data-signals are encrypted and the process contrary that TCM deciphering chip 50 pairs of data-signals are decrypted.
As shown in Figure 3, in one embodiment, the USB encryption device of above-mentioned embedded TCM chip, also comprise signal return circuit 70, TCM encryption chip 40 is connected by signal return circuit 70 with USB interface 20, signal return circuit 70 TCM encryption chip 40 is encrypted after data-signal send USB interface 20 to; In the present embodiment, reduction treater 60 is also connected by signal return circuit 70 with USB interface 20, and the data-signal after reduction treater reduces by signal return circuit 70 sends USB interface to.
In other embodiments, TCM encryption chip 40 is connected by signal return circuit 70 with USB interface 20, and reduction treater 60 is directly connected with USB interface 20; Or TCM encryption chip 40 is directly connected with USB interface 20, and reduction treater 60 is connected by signal return circuit 70 with USB interface 20.
In the USB encryption device of above-mentioned embedded TCM chip, USB interface, transponder, conversion processor are connected successively with TCM encryption chip, the original data signal received from external unit is carried out changing and encrypting, and USB interface, transponder, TCM deciphering chip are connected successively with reduction treater, data message after the encryption received from external unit is decrypted and reduces, can prevent the intermediate processing data of encryption process from being intercepted and captured by Malware, improve the difficulty cracking the data-signal of the USB encryption engine encrypts of this embedded TCM chip; And could can only be deciphered by the USB encryption device of this embedded TCM chip by the data-signal that the USB encryption engine encrypts of this embedded TCM chip is crossed, almost can reach the effect that can not be cracked by miscellaneous equipment or software; And transponder is connected by conversion processor with TCM encryption chip, thus original data signal is first changed by conversion processor before encryption, and TCM deciphering chip and USB interface are connected successively by reduction treater, data-signal after deciphering must also will be undertaken reducing by reduction treater and just can become original data signal again, thus more improve the data-signal after encryption crack difficulty.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a USB encryption device for embedded TCM chip, is characterized in that, comprising:
Receive the data-signal of external unit transmission and the USB interface of encryption and decryption signal;
Transponder that be connected with described USB interface, that according to described encryption and decryption signal, described data-signal is transmitted to conversion processor or TCM deciphering chip;
That be connected with described transponder, that described data-signal is changed conversion processor;
That be connected with described conversion processor, that the data-signal after changing is encrypted TCM encryption chip, described TCM encryption chip is also connected with described USB interface, sends the data-signal after encryption to described USB interface;
That be connected with described transponder, that described data-signal is decrypted TCM deciphering chip;
Reduction treater that be connected with described TCM deciphering chip, that reduce to the data-signal after deciphering, described reduction treater is also connected with described USB interface, sends the data-signal after reduction to described USB interface.
2. the USB encryption device of embedded TCM chip according to claim 1, is characterized in that, described conversion processor is connected by UART, SPI or I2C bus with described TCM encryption chip.
3. the USB encryption device of embedded TCM chip according to claim 1, is characterized in that, described TCM deciphering chip is connected by UART, SPI or I2C bus with described reduction treater.
4. the USB encryption device of embedded TCM chip according to claim 1, it is characterized in that, described device also comprises signal return circuit, described TCM encryption chip is connected by described signal return circuit with described USB interface, and described signal return circuit sends the data-signal after described TCM encryption chip encryption to described USB interface.
5. the USB encryption device of embedded TCM chip according to claim 4, it is characterized in that, described reduction treater is connected by described signal return circuit with described USB interface, and described signal return circuit sends the data-signal after described reduction treater reduction to described USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453736.XU CN204044830U (en) | 2014-08-12 | 2014-08-12 | The USB encryption device of embedded TCM chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453736.XU CN204044830U (en) | 2014-08-12 | 2014-08-12 | The USB encryption device of embedded TCM chip |
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| CN204044830U true CN204044830U (en) | 2014-12-24 |
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| CN201420453736.XU Expired - Fee Related CN204044830U (en) | 2014-08-12 | 2014-08-12 | The USB encryption device of embedded TCM chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105740733A (en) * | 2016-01-28 | 2016-07-06 | 山东超越数控电子有限公司 | Encrypted mobile hard disk and realization method thereof |
-
2014
- 2014-08-12 CN CN201420453736.XU patent/CN204044830U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105740733A (en) * | 2016-01-28 | 2016-07-06 | 山东超越数控电子有限公司 | Encrypted mobile hard disk and realization method thereof |
| CN105740733B (en) * | 2016-01-28 | 2019-01-08 | 山东超越数控电子有限公司 | A kind of encryption mobile hard disk and its implementation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20210812 |