Running the Lab
- Order the MAXAUTHDEMO1# or MAXAUTHDEMO2#
- Plug in the boards and connect cable to the PC's USB port
- Download the Security Lab application
- Run the Security Lab application
- A command window will open with a prompt to 'Enter link code'. Type
the code
below at the prompt.
453100
- Select the desired hardware
- Press the Start Connection button to establish connection between
the website and the Security Lab application
Start Hardware Interface
Provides Affordable Elliptic-Curve Public-Key Authentication Security to Protect Your Development Investment
Introduction
The DS28C36 (Figure 1) is a DeepCover® ECDSA (elliptic curve digital signature algorithm) and SHA-256 (secure hash algorithm, 256 bit) authenticator, which is operated over I2C interface. The three ECDSA private and public key pairs for signature generation and verification can be computed by the device or installed by the user and optionally locked. Separate memory space may be used to store and lock a public-key certificate. The 8kb of secured EEPROM provides a 4kb user partition that is organized as 16 pages of 256 bits and can be left unprotected or irreversibly write-protected, read-protected, authentication-protected, encrypted, or set up for EEPROM emulation mode. The DS28C36 also features a FIPS-grade TRNG (true random number generator), and a one-time settable, non volatile, 17-bit decrement-only counter, which can be used to electronically control the lifetime of the object with which the DS28C36 is associated. Each device has its own guaranteed unique 64-bit ROM ID, factory programmed into the chip. This ROM ID is an input parameter for cryptographic operations.
Figure 1. DS28C36 Block Diagram
Product Details
Parametric specs for Secure Authenticators
| Crypto Engine | Asymmetric |
| Symmetric | |
| Applications | IP Protection |
| Medical Consumable ID | |
| Medical Sensor Authentication and Calibration | |
| Medical PCB ID and Authentication | |
| Print Cartridge Authentication |
Simplified Block Diagram
DS28C36: Typical Application Circuit
- Asymmetric & Symmetric functions for core set of crypto tools
- FIPS186 ECDSA P256 signature and verification
- FIPS180 SHA-256 for HMAC
- ECDH key establishment function to support encrypted I/O of sensitive data
- configurable ECDSA or HMAC authenticated R/W memory
- NIST SP 800-90B TRNG with command to output RND
- Multiple configurable key options
- 3x Pu/Pr key pairs for ECC
- 2x Secrets for SHA-256
- GPIO pins: 4mA/0.4V
- Optional ECDSA or SHA-256 authentication ON/OFF and state read
- Optional ECDSA to set ON/OFF after multi-block Hash for Secure Boot
- Decrement-only counter with authenticated read
- 8kb EEPROM
- Unique factory programmed read-only serial number (ROM ID)
- Strong protection against invasive and non-invasive security attacks
- 3.3V; -40C to +85C, 3x3 TDFN
Challenge & Response Authentication Using Symmetric SHA-256
-
- Connectivity Between Host and Device
- DS28C36
Host Computed Slave Secret
Select Page
Authentication Result
Challenge & Response Authentication Using Asymmetric ECDSA
-
- Connectivity Between Host and Device
- DS28C36
Verify Slave is Authentic within the System
Modify Message Digest
Select Page
Authentication Result
Authenticated SHA-256 Write
-
- Connectivity Between Host and Device
- DS28C36
Host Computed Slave Secret
Slave Page 0
New Page Data
Authenticate New Page
Data
Authenticated ECDSA Write
-
- Connectivity Between Host and Device
- DS28C36
Slave Authenticate Host's Public Key for Writes
Slave Page 1
Authenticate New Page Data
Authentication Result
ECDH Key Establishment and Encrypted IO
-
- Connectivity Between Host and Device
- DS28C36
Host Verify the Slave is Authentic within the System
Compute Slave Session Key
Compute Host Session Key
Host Reads and Decrypts Encrypted Page 2 Data
Secure Download
-
- Connectivity Between Host and Device
- DS28C36
Verify Slave is Authentic within the System
Host Sign Download Data
Secure Encrypted GPIO
-
- Connectivity Between Host and Device
- DS28C36
Host Computed Slave Secret
GPIO Page
Protect your design using Crypto-Strong Authentication Secured with a Physically Unclonable Function
Introduction
The DS28E38 (Figure 1) is an ECDSA public-key based secure authenticator that incorporates Maxim's patented ChipDNA™ feature, a physically unclonable function (PUF) to provide a cost-effective solution with the ultimate protection against security attacks. The DS28E38 security guide describes the command sequences to use ChipDNA with the cryptographically secure device data, and to operate the ECDSA engine, the decrement-only counter, and the unique 64-bit ROM identification number (ROM ID). After a 1-Wire® Reset/Presence cycle and ROM function command sequence is successful, a DS28E38 is ready to accept the device function command sequence. Common to all device function commands is a command start issued first followed by a length byte, the device function command, and the parameter byte(s). The master receives a 16-bit CRC as confirmation of the device function command sequence to verify that it was received properly. Then the release byte can be issued followed by a delay with strong pullup (i.e., a low impedance bypass to supply high current demands during command processing). When the delay is complete, the master transmits a dummy byte and receives the length byte and result byte from DS28E38. Depending on the length byte received, subsequent result data may or may not be sent after the result byte. Finally, the master receives another 16-bit CRC as confirmation of the data DS28E38 sent after the dummy byte.
Figure 1. DS28E38 Block Diagram
Product Details
Parametric specs for Secure Authenticators
| Crypto Engine | Asymmetric |
| Applications | IP Protection |
| Medical Consumable ID | |
| Medical Sensor Authentication and Calibration | |
| Medical PCB ID and Authentication | |
| Print Cartridge Authentication |
Simplified Block Diagram
DS28E38: Typical Application Circuit
- Protected with Physically Unclonable Function (PUF)
- ECDSA-based Challenge/Response Authenticator
- FIPS186 ECDSA Engine
- FIPS180 SHA-256 Engine
- NIST SP 800-90B TRNG with command to output RND
- 2kb E2 Array for User Memory and Public-Key Certificate
- Decrement-only counter with authenticated read
- Unique factory programmed read-only serial number (ROM ID)
- Strong protection against invasive and non-invasive security attacks
- 3.3V; -40C to +85C, 3x3 TDFN