ReRAMs can be utilized as PUFs

While historically utilized as non-volatile semiconductor memory, CrossBar’s ReRAM technology in now being introduced for use in hardware security applications utilising its ReRAM based cryptographic PUF keys, enabling a more secure and cost-effective class of devices and systems.

“We believe the state-of-the-art use of our unique technology as PUF cryptographic keys will provide higher security for our customers’ products,” says CEO Mark Davis,

To resist cyber attacks, devices are integrating secret cryptographic “keys” to facilitate secure communications and control.  While there are numerous technologies currently utilized as PUF keys, the most common approach leverages semiconductor SRAM.

Compared to SRAM PUF, CrossBar’s latest ReRAM based PUF cryptographic key technology has a higher level of randomness, much lower bit error rate, resistance to invasive attacks and the capability of handling a broad range of environmental variations without requiring fuzzy extractors, helper data or heavy error correction code.

The ReRAM keys are unique to each individual semiconductor integrated circuit (IC), leveraging the inherent randomness characteristics of the ReRAM technology. These keys will be used for identification, encryption/decryption and authentication.

ReRAM PUF is also a candidate for semiconductor applications requiring security and embedded NVM, especially for foundry nodes smaller than 28nm where embedded NVM is not readily available.

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