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Deep Cover Automotive 1-Wire Authenticator

Ensure Vehicle Safety and Reliability by Authenticating Automotive Components

Product Details

Parametric specs for Secure Authenticators
End Equipment Automotive Secure Authentication
Secure Authentication of Accessories and Peripherals
Secure Boot or Download
Bus Type 1-Wire
Memory Type OTP
Memory Size 6 Kb
Deep Cover Yes
Package/Pins TDFN/10
Budgetary
Price (See Notes)
1.22
Parametric specs for 1-Wire Interface Products
Functions Authentication
VSUPPLY (V) 2.97 to 3.63
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to 125 C
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Simplified Block Diagram

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Parameters

Parametric specs for Secure Authenticators
End Equipment Automotive Secure Authentication
Secure Authentication of Accessories and Peripherals
Secure Boot or Download
Bus Type 1-Wire
Memory Type OTP
Memory Size 6 Kb
Deep Cover Yes
Package/Pins TDFN/10
Budgetary
Price (See Notes)
1.22
Parametric specs for 1-Wire Interface Products
Functions Authentication
VSUPPLY (V) 2.97 to 3.63
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to 125 C

Key Features

  • ECC-P256 Compute Engine
    • FIPS 186 ECDSA P256 Signature and Verification
    • ECDH Key Exchange for Session Key Establishment
    • ECDSA Authenticated R/W of Configurable Memory
  • SHA-256 Compute Engine
    • FIPS 198 HMAC for Bidirectional Authentication
  • SHA-256 One-Time Pad Encrypted R/W of Configurable Memory Through ECDH Established Key
  • One GPIO Pin with Optional Authentication Control
    • Open-Drain, 4mA/0.4V
    • Optional SHA-256 or ECDSA Authenticated On/Off and State Read
    • Optional ECDSA Certificate Verification to Set On/Off after Multiblock Hash for Secure Boot
  • TRNG with NIST SP 800-90B Compliant Entropy Source with Function to Read Out
  • Optional Chip-Generated Pr/Pu Key Pairs for ECC Operations
  • 6Kb of One-Time Programmable (OTP) for User Data, Keys, and Certificates
  • Unique and Unalterable Factory-Programmed 64-Bit Identification Number (ROM ID)
    • Optional Input Data Component to Crypto and Key Operations
  • Single-Contact, 1-Wire Interface Communication with Host at 9.09kbps and 62.5kbps
  • 3.3V ±10%, -40°C to +125°C Operating Range
  • ±8kV HBM ESD protection of 1-Wire IO Pin
  • 10-Pin TDFN Package
    • 3mm x 4mm TDFN Package
    • 3mm x 3mm, Side-Wettable TDFN Package
  • AEC-Q100 Grade 1

Applications/Uses

  • Accessory and Peripheral Secure Authentication
  • Automotive Secure Authentication
  • Identification and Calibration Automotive Parts/Tools/Accessories
  • IoT Node Crypto-Protection
  • Secure Boot or Download of Firmware and/or System Parameters
  • Secure Storage of Cryptographic Keys for a Host Controller

Description

The DS28E40 is a secure authenticator that provides a core set of cryptographic tools derived from integrated asymmetric (ECC-P256) and symmetric (SHA-256) secu­rity functions. In addition to the security services provided by the hardware-implemented cryptographic engines, the device integrates a FIPS/NIST True Random Number Genera­tor (TRNG), 6Kb of One-Time Programmable (OTP) memory for user data, keys and certificates, one configurable General-Purpose Input/Output (GPIO), and a unique 64-bit ROM identification number (ROM ID).

The ECC public/private key capabilities operate from the NIST-defined P-256 curve and include FIPS 186 compliant ECDSA signature generation and verification to support a bidirectional asymmetric key authentication model. The SHA-256 secret-key capabilities are compliant with FIPS 180 and are usable flexibly either in conjunc­tion with ECDSA operations or independently for multiple Hash-Based Message Authentication Code (HMAC) functions.

The GPIO pin is operated under command control and is configurable enabling support of authenticated and non-authenticated operation. The GPIO-authenticated operation supports ECDSA-based crypto-robust mode, enabling secure-boot of a host processor.

DeepCover embedded security solutions cloak sensitive data under multiple layers of advanced security to provide the most secure key storage possible. To protect against device-level security attacks, including invasive and noninvasive methods, countermeasures include active die shield, encrypted storage of keys, and algorithmic methods.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .