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Authentication chips detect counterfeit batteries, other electronic accessories

Milpitas, Calif. — Infineon Technologies AG has introduced what it says is the industry's first chip that uses asymmetric authentication with elliptic curve cryptography (ECC) and an integrated temperature sensor to help battery and electronics manufacturers detect counterfeit, or unauthorized accessories and aftermarket replacements.

Comprised of two devices, the ORIGA SLE95050 authentication chip family includes the SLE95050F2 without temperature monitoring and the SLE95050F1 version with an integrated temperature sensor that can improve the safety level of batteries for electronic devices such as digital cameras, mobile phones and portable computers. It can also be used for printer cartridges, replacement parts, medical disposables, networking equipment or other accessories such as earphones, speakers, docking stations and chargers.

The ORIGA SLE95050 family features ECC asymmetric authentication, which uses two different keys (one public, one private) to encrypt and decrypt information. ECC is a considerably more modern encryption/decryption algorithm than today's asymmetric systems, like RSA, and symmetric systems that use the same key for encryption and decryption, like AES and DES, said Infineon. Using ECC significantly increases the level of security as the private key is hidden in the ORIGA chip, which is integrated into the accessory or the battery.

In addition, the ORIGA SLE95050 devices do not require an additional security chip inside the host device. Implementation can be performed in software without compromising security.

The authentication chip family also complies with emerging battery safety regulations, for example in Japan, that require temperature monitoring of lithium-based batteries. It provides a built-in analog-to-digital converter that allows temperature monitoring from either on-chip or an external sensor via a bus command using Infineon's proprietary single wire interface.

With non-volatile memory (NVM) of up to 1 kbit including NVM for write-protection and a unique chip ID, ORIGA also provides the added benefit of personalization by storing data about the specific accessory, the logistics chain and usage of the accessory itself.

The SLE95050 operates over the temperature range from -25°C to 85°C and at an operating voltage range of 2.0 V to 5.5 V.

Pricing: Sample quantity pricing for the SLE95050F1 with integrated temperature sensor in an 11-pin, TSLP-package (2.5 x 2.5 mm) is $2.50.
Availability: Samples of both devices are available with production expected to start at the end of 2008.
Product information: ORIGA SLE95050 chips and Podcast

Infineon Technologies , www.infineon.com

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