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High-Security encrypted USB flash drive KOBRA

The KOBRA Stick is an encrypted USB-C flash drive in a sturdy, metal casing.

It enables the storage, safekeeping and secure transport of sensitive business and private data for public authorities and companies in accordance with data protection regulations.

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Category: Encrypted Disks
Warranty: 1 year

It was developed in accordance with the “Technical Guidelines” of the BSI, has the quality marque “IT Security made in Germany” and, due to its security functions, is a good option for securely storing data on the move.


The confidentiality of the data stored on the KOBRA Stick is protected against unauthorised access, for example if the data carrier is lost or stolen, or in the event of virtual or physical attacks.


As long as the KOBRA Stick is not connected to a PC or with an external power supply (e.g. USB power supply or USB hub) it stays in sleep mode and all keys are deactivated.


The KOBRA Stick guarantees the confidentiality of data through the following security mechanisms:


  • Encryption

  • Access control

  • Cryptographic key management




The encryption module integrated in the safety housing carries out a complete encryption of the KOBRA Stick. Every byte saved and each written sector on the storage device is encrypted in XTS mode, using two cryptographic keys according to the 256-Bit AES (Advanced Encryption Standard). The KOBRA Stick also encrypts temporary data and areas that are often ignored by encryption software.


Access control


  • Access is granted by entering a user PIN


The KOBRA Stick automatically creates a new encryption key and resets the user PIN to the default setting as soon as the permitted number of incorrect PIN entries has been exceeded. Access to the data stored on the drive is then no longer possible.


Management of the cryptographic keys


The user can generate, change or destroy the cryptographic keys at any time. This process is irreversible. After the generation of new cryptographic keys, the old cryptographic keys and thus all data stored on the data carrier are irreversibly destroyed. Therefore, any information stored on the drive should first be saved on another encrypted data carrier, where necessary.


The two 256-bit encryption keys for the encryption and decryption of the data are generated by a hardware random number generator and stored within the drive. When the user PIN is entered correctly they are transmitted to the encryption module of the KOBRA Stick for the encryption and decryption of the data.


Overview of the most important features


  • AES Full-disk hardware encryption in XTS mode with two 256-bit cryptographic keys

  • Authentication via user PIN

  • Hardware-based encryption module

  • Data encryption of all saved bytes and written sectors

  • Independent of operating system (supports all operating systems, multi-media devices, smartphones, and machines that support USB data carriers)

  • Integrated write protection

  • Adjustable number of incorrect PIN attempts

  • Compatible with USB 3.0 and USB 2.0

  • No read and write speed restrictions

  • Sturdy metal casing

  • Time-out & quick-out functions

  • Pre-boot authentication and bootability

  • Easy and secure handling due to hardware encryption: connect, login, use

  • Internal power supply that allows authentication without connecting to a PC or USB hub




  • USB VID, PID & serial numbers can be defined according to customer

  • Specifications

  • Laser-engraved customer specific information on the back of the KOBRA Stick


Technical specifications

Encryption algorithm

AES-256 in XTS mode


USB 3.0, USB 2.0


BSI certification


4 GB, 8 GB, 16 GB, 32 GB, 64 GB, 128 GB, 256 GB

Authentication mode




Brute-force defence

YES – on multiple incorrect attempts to guess the PIN will automatically format the entire disk



Resistant to keyloggers


Transfer speed

  • USB 3.0 max. 5 GBit/s

  • USB 2.0 max. 480 MBit/s

Consumer guarantee

2 years for consumers, 1 year for the company


DIGITTRADE GmbH, www.digittrade.de


Product contents


  • KOBRA Stick (externally encrypted USB-C flash drive) Version 1.0

  • 3 USB cables (USB-C to USB-C, USB-C to USB-A, USB-C to USB Micro-B)

  • Packaging