Touch-tone encrypted safety USB (universal serial bus) flash disk

Abstract

The invention relates to a touch-tone encrypted safety USB (universal serial bus) flash disk. The touch-tone encrypted safety USB flash disk comprises a central processing unit, an encryption unit, an encryption control logical unit, a data storage interface and a key. The central processing unit is respectively connected with the encryption unit, the encryption control logical unit and the data storage interface, the encryption control logical unit is connected with the key, and the data storage interface is respectively connected with the encryption unit and the central processing unit. The touch-tone encrypted safety USB flash disk further comprises a USB interface and an internal storage module, the USB interface is connected with the encryption unit, the internal storage module is connected with the central processing unit and comprises a first storage module and a second storage module, the first storage module is a non-encrypted storage module, and the second storage module is an encrypted storage module. The touch-tone encrypted safety USB flash disk has the advantages of safety, reliability, portability and stability in performance.

Description

technical field [0001] The invention relates to a push-button encryption safety U disk. Background technique [0002] In the prior art, pure software encrypted U disks are widely used, and the U disks are encrypted by software; this kind of protection is completely dependent on the host-side software, and there is no special requirement for the U disk itself, and the encryption performance is completely dependent on the host itself. It is characterized by low cost and easy promotion, but the working method of this kind of U disk determines that it is in a fragile state without hard protection when it is separated from the original host environment. The general pure software encryption method is due to performance and compatibility. requirements, usually the encryption strength is limited, and the corresponding decryption difficulty is not too high. [0003] For fields with high security requirements, there are also encrypted U disks (secret U disks) that use a combination o...

AI Technical Summary

Problems solved by technology

[0003] For fields with high security requirements, there are also encrypted U disks (secret U disks) that use a combination of software and hardware. The data in this U disk is fully encrypted, and the encryption and decryption process depends on an independent hardware encryption and decryption chip; the chip itself It is difficult to crack, and obtains user authorization by communicating with the host through a specific interface, usually a fingerprint recognition module or a contact / non-contact IC card sensor, etc. The chip even adds independent peripherals to obtain higher security. However, like the software encrypted U disk, when it is separated from the specific host-side environment, because the encrypted U disk is still a passive storage device, it does not have active storage. The ability to identify the host-side device, and the data stored in it can usually be directly accessed, but these data are encrypted ciphertext encrypted data, which has a high cracking strength and is usually difficult to crack. High cost and long time

In addition, the method of obtaining user authentication information from the host-side application software interface also causes the host-side to be in an untrusted environment. For example, when the host-side operating system is infected with a virus or is planted with a Trojan horse, there is a greater possibility of leakage of user authentication information.

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