 Okay, we've added a new segment that I'm excited about it's been hit every single week Special thanks to digikey for making this happen. This is a digikey and a fruit partnership. Here it is. Are you ready? Yes? I love that song this week's ion MPI is the ST safe Thank you Okay, so this week we're going to be focusing on a security chip and we've talked about security chips before basically You know you have your microcontroller or micro computer. You're connecting to the internet of things either, you know Laura or sick fox or Wi-Fi or Ethernet and Chips themselves, you know, they have some security Built in usually they have like a no-former read or maybe they have a former encryption But that usually isn't a really hardened security system I mean if you're buying a chip specifically for that purpose, you can get one that has, you know, pretty good resilience against attacks Such as like decapping or glitching or, you know, brute forcing or, you know, like UV erasing selectively But even, you know, we even saw like chips that are only a couple of years old still make mistakes once in a while And it's possible to Crack the firmware out and read it and that means that if you have a private key like an authentication key or token And it's in the firmware it can be read out Which is what you want to avoid because then especially if it's a private key that's used in every device It's like the same key in every device Then somebody could like clone the hardware or do man the middle attacks or you know other internet of things security issues so What's nice about these security chips such as the ST safe is that you only That's a that's the next one the The nice thing about these chips is that you can use any microcontroller So whether you want to use expressive or you want to use microchip or you want to use ST or you want to use You know 10 silk or a TI whatever any chip you want that has the peripherals you need for your project Maybe as a built-in radio. Maybe as Bluetooth and you don't have to worry about whether that chip is a hardened security chip because you will store All of your secrets your private tokens your your certificates your hashing keys all go into this one chip and this chip is like Not expensive because it only does one thing, but it does it really really well. So There is a nice little flow chart here. There's a diagram. So This is from the presentation. So, yes, you have this ST safe chip, which is the hardened crypto and hashing authentication chip and You communicate to it over I squared C So over any microcontroller and then you can connect over, you know Any wireless or network protocol you want it can be used for authentication. So like, you know making sure that The product is a genuine product and it's permitted to talk to the IoT service or to connect They can be used to speed up TLS authentication So a lot of chips, you know, maybe they're good at one thing, but they don't have a built-in crypto hardware accelerator Not a problem, you know, if you have to do hashes or AES, you know encryptions or envelope Signings, etc. This chip doesn't very very fast. So, you know, I've seen these chips being used As a co-processor for TLS to speed up the connectivity to do that Public encryption handoff They can do random number generation and like true random numbers and a couple other things and So the SC safe comes in two packages SOIC or like a USON and it comes in the shield, which I will show on late overhead yeah, so this is the shield and It's Basically, you can pick this up and just you will have the part number and it's Arduino shield compatible so you can plug this into your Metro Arduino or What we recommend because the software is available for STM32 cube is you grab one of these nucleobards, which are inexpensive They're only like 15 to $20 or so This one is the L 475 We recommend getting the L Focus The L476 because that's actually what the tutorial the projects in the software download are built for and then You just plug this in and then you can just learn how to use this chip Very nice. So if you're wondering which nuclear board goes with it now, you can go to that secondary the whiteboard Yeah, this is the one that we recommend you get because we already kind of look at the software and The code is available You can download it, but it's kind of designed for STM32 cube Which is the IDE that STM uses for their chips And if you haven't used it, Sean Hybel has a great video series to get you started So if you would like to do IOT and you don't have to worry about security you want to outsource that security stress Pick out the pick up the X Nucleo safe a1a. It's available at Digkey. They have these aval boards only a couple bucks Plug it into any Nucleo board. There's a range of them, but again, we recommend the 476 and Try out they have a bunch of examples for the embed with TLS random number generation Hashing etc. Yeah, and when you buy it on Digkey, I think you can put comments on the order or something Oh, yeah, we're just we're just tweet and just say hey I saw this on ask an engineer IOT MPI because Digkey is helping us out with the series and more So that's a nice way to say thank you not only to us, but to them Yes, and that is an MPI. Thank you