Maxim Integrated Products, Inc. is sampling the DS28E35 DeepCover Secure
Authenticator, a highly secure cryptographic solution for a host
controller to authenticate peripherals. The DS28E35 integrates a FIPS
186-based, Elliptic Curve Digital Signature
Algorithm (ECDSA) engine to implement asymmetric (public-key)
cryptography to operate a challenge-and-response authentication protocol
between a host controller and attached peripherals, sensors, or
Operating over a single pin on the 1-Wire interface,
the DS28E35 reduces interconnect complexity, simplifies designs, and
reduces cost. It provides crypto-strong authentication security
for many applications, including medical sensors, industrial
programmable logic controller (PLC) modules, and consumer devices.
DS28E35 operates with a key pair: a public key that resides with the
host and an associated private key stored in the DS28E35. As a primary
benefit of ECDSA, there is no security requirement to protect the host
public key. It is imperative, however, to protect the private key stored
in the DS28E35. This is accomplished through Maxim’s DeepCover security
technologies, which provide the strongest affordable protection against
die-level attacks that attempt to discover the private key.
technologies include advanced die routing and layout techniques,
additional proprietary methods for private key protection, and circuits
that actively monitor for tampering.
ECDSA asymmetric, public-key cryptography saves cost: eliminates the need for additional secure authentication key storage ICs in the host system.
integration reduces costs, simplifies designs: ECDSA engine with a
1-Wire interface; nonvolatile (NV) memory; hardware random number
generator for signatures and key-pair generation; decrement-only usage
counter; and DeepCover invasive-attack protection circuitry.
interconnect complexity: 1-Wire interface allows operation from a
single dedicated contact which, in turn, improves reliability and
Easily adapts to a host-peripheral system where secure authentication is required.