Security weaknesses in companion Flash memory to an MCU or SoC expose OEMs to the risk of product theft due to the cloning of reverse engineered PCB designs.
Authentication flash memory provides a secure handshake between the controller and the memory to ensure enhanced security of the data transmitted between two devices. These products in the W74M family come with standard HMAC-SHA-256 crypto accelerator and 4 separate Monotonic Flash Counters that are HMAC-signed (Hash-based Message Authentication Code) by individual secret keys.
Systems utilizing each Monotonic Flash Counter can not only verify the integrity and authenticity of the counter values, but also add a timestamp to the message/information transmitted as well as provide resistance to repeated attacks.

Block diagram of authentication flash
W74M products enable system designers to strengthen code/data storage as well as deliver increased security with multi-layered authenticity for emerging IoT devices on the edge and outside the cloud. These security products also provide enhanced security to gateways, sensors, doorbells, cameras and other similar devices in automotive, industrial, communication, and consumer applications.

Multi-layer authentication
Density
Part No. |
Voltage |
Speed |
Temp. |
Features |
Status |
Industrial Datasheet |
Automotive |
Industrial |
W74M25JV |
2.7V - 3.6V |
133MHz |
-40 ℃ ~ 85℃ |
Device and/or Module Authentication Flash Command and Socket Compatible |
S |
N* |
pdf
|
W74M25JW |
1.7V - 1.95V |
104MHz |
-40 ℃ ~ 85℃ |
Device and/or Module Authentication Flash Command and Socket Compatible |
UD |
N* |
pdf
|
Status:P= Mass Production, S= Samples, UD= Under Development, N= Not Recommended For New Design
All Winbond Flash products are "Green", Halogen-Free and RoHS compliant packaging. Refer to the datasheet for details and specifications.
N*:W74M25JV/JW can be replaced by W25R256JV/JW.
Solution
Technical Documentation
Resources
Winbond Authentication Flash Product Brief
Product Brief
- File Type:pdf
- Updated:05/03/2023
- Download
Winbond TrustMe Secure Flash - A Robust and Certifiable Secure Storage Solution
Video
- File Type:Video
- Updated:11/12/2018
- Watch
New Memory and Security Technologies for Designers of IoT Devices
Video
- File Type :Video
- Updated:11/12/2018
- Watch
Winbond we deliver the best IoT memory solution!
Video
- File Type:Video
- Updated:15/08/2018
- Watch
Winbond embedded world 2018_Security Flash
Video
- File Type:Video
- Updated:26/06/2018
- Watch
Winbond embedded world 2018_Authentication and SpiStack® Flash Memory
Video
- File Type:Video
- Updated:26/06/2018
- Watch