Defcon's new badge is a security key you can see inside

A technology report on an open-source RISC-V security chip that leverages resistive RAM (RRAM) to make physical extraction more difficult. The chip currently functions like a YubiKey and may evolve into an HSM or run Linux; it includes a 350 MHz RISC-V core with 2 MB SRAM, 4 MB RRAM, and 4x700 MHz PicoRV32 cores. The author notes the chip’s security benefits while acknowledging it could be defeated by a well-funded hardware lab, and expects DefCon testing and discovery of potential zero-days.