Industrial IoT
Trusted edge devices
Gateways and controllers prove their identity before they can join the network.
Hardware Digital Signature Storage
X-PHYTrustSign Series
Digital ID • Function Control Key • Dual-Layer Key Protection
X-PHY TrustSign SD, microSD and USB storage carry a protected identity inside the hardware. A unique Key string, encrypted by Crypto Codec (HDS) and stored in a scrambled Hidden Area, lets IoT systems verify each device and unlock only the functions it is licensed for.
Unverified Devices on IoT Networks
Problem
Edge devices often join a network with nothing that proves who they are, so a cloned or rogue unit can pass as a trusted one.
Copyable Software License Keys
Problem
License keys kept in software or plain files can be copied to unlicensed machines.
Uncontrolled Appliance Functions
Problem
Without a physical authorization key, premium or restricted functions can be enabled by anyone with access to the equipment.
Keys Exposed on the Storage Bus
Problem
Security keys sent in the clear between host and card can be captured and replayed.
Readable Data on Lost Drives
Problem
A misplaced USB drive exposes every stored file to whoever picks it up.
Key Advantages
Why X-PHY TrustSign?
Identity and authorization built into the storage hardware
Digital ID for IoT Devices
Every card carries its own identity, so genuine devices are recognized on your IoT network and cloned units are turned away.
Function Control Key
Use the card as a license key for specific software, or as an authorized key that activates and regulates appliance functions.
Dual-Layer Key Protection
Each Key string is encrypted with proprietary Crypto Codec (HDS) on the SD bus, then scrambled and stored in a reserved Hidden Area on the card.
Password-Masked USB
TrustSign USB masks the entire drive through the X-PHY application. Stored data opens only after the legitimate user enters the correct password.
Industrial-Grade Reliability
Built on SLC, 3D pSLC and MLC flash with MTBF above 3,000,000 hours. The security function does not change the standard product specification.
Security Architecture
From Key String to Access Decision
How a device’s identity travels from the card to the system that authorizes it.
Per-Device Key String
Encrypted SD Bus
Edge Application Processor
Security Key Management System
Access Authorization
The TrustSign Series
Choose Your X-PHY TrustSign Form Factor
Three form factors, one approach: the security function sits alongside standard industrial storage.
Compliant with SD 6.1 on 3D pSLC flash. Serves as a Digital Signature for IoT and as a licensed or authorized key in function control systems.
3D pSLCSD 6.1SPI modeData cryptoAuto read refresh
Compliant with SD 3.0 on SLC flash, with Commercial, Gold and Diamond temperature grades for Digital ID and function control deployments.
SLCSD 3.0SPI modeData cryptoAuto read refresh
Compliant with USB 2.0 on MLC flash. Mask the entire drive with the X-PHY application so stored data is only accessible after password authentication.
MLCUSB 2.0 Type-APassword maskEnhanced error correctionHigh random 4KB IOPS
How It Works
Verified identity without a complicated setup.
The TrustSign journey comes down to four steps. The full workflow for each form factor is available below.
-
01
Provision
The Key Manager assigns a unique Key string to each specified device.
-
02
Protect
Crypto Codec (HDS) encrypts the key and the card stores it in its scrambled Hidden Area.
-
03
Deploy
Install the card in the IoT device, controller or appliance and use it as normal storage.
-
04
Verify to Access
The edge processor reads the key and the Security Key management system grants access.
View Detailed Workflow
SD and microSD cards follow the Digital Signature workflow. The USB drive uses password masking. Scroll sideways on smaller screens.
Core Capabilities
Built to keep data intact, not just trusted.
Storage-level features from the TrustSign datasheets that keep data reliable in demanding deployments.
Data Crypto
Built-in data crypto support for information written to the card.
SD · microSD
Auto Read Refresh
Refreshes stored data automatically to help preserve integrity over long deployments.
SD · microSD
Read Disturbance Management
Keeps frequently read data reliable by managing the effects of repeated reads.
SD · microSD · USB
Adaptive Wear Leveling
Spreads writes evenly across the flash to extend usable life.
SD · microSD · USB
Sudden Power-Fail Management
Protects stored data when power drops unexpectedly in the field.
SD · microSD · USB
Enhanced Error Correction
Stronger error correction with high random 4KB IOPS for dependable daily use.
USB
Use Case
Where X-PHY TrustSign Delivers Value
Software Licensing
Hardware license keys
Tie a software license to a physical card so it cannot be copied to another machine.
Appliance Control
Authorized functions
Enable specific appliance features only when an authorized TrustSign key is present.
Portable Data
Private files on the move
Keep valuable data masked on a USB drive until the right password is entered.
Ideal for OEMs and system integrators that need device authentication, license enforcement, or controlled access to data on removable storage.
SD, microSD, USB
Form Factors
- SD
- 32 × 24 × 2.1 mm
- microSD
- 15 × 11 × 1 mm
- USB
- 54.7 × 17 × 8 mm
SLC, 3D pSLC, MLC
Flash Type
- SD
- SLC
- microSD
- 3D pSLC
- USB
- MLC
512MB to 128GB
Capacity
- SD
- 512MB to 32GB
- microSD
- 16GB to 128GB
- USB
- 8GB to 32GB
More than 3,000,000 hours
MTBF
- SD
- > 3,000,000 h
- microSD
- > 3,000,000 h
- USB
- > 3,000,000 h
Up to 90 MB/s
Max. Read
- SD
- 90 MB/s
- microSD
- 88 MB/s
- USB
- 27.3 MB/s
Up to 70 MB/s
Max. Write
- SD
- 70 MB/s
- microSD
- 69 MB/s
- USB
- 20.6 MB/s
−40°C ~ 85°C
Operating Temperature
- SD
- 0°C ~ 70°C / −25°C ~ 85°C / −40°C ~ 85°C
- microSD
- −25°C ~ 85°C / −40°C ~ 85°C
- USB
- −40°C ~ 85°C
S. M. A. R. T.
S. M. A. R. T. Support
- SD
- Supported
- microSD
- Supported
- USB
- Supported
TrustSign Series
Verify Every Device withX-PHY TrustSign
Hardware-protected Key strings for Digital ID and function control, in SD, microSD and USB form factors.
