In this video segment from my interview with Vegard Wollan, the co-inventor of the AVR microcontroller, we explore in detail the security problems you need to address as an embedded designer.
Let’s face it, it is obvious that security is a way of thinking. You have to assume bad people are going to try and hack your products. With the oncoming revolution in the Internet of Things, it is important you design the security within, rather than try to tack something on after an exploit.
The key thing you have to know is that nothing beats hardware security. This is where the security system is implemented in silicon, storing a secret key, hash algorithms and random-number generator (RNG). Atmel makes both standalone security chips and incorporates the security circuits into some of our microcontrollers including Atmel | SMART ARM-based chips used for smart energy meters. The chips are more sophisticated than a simple IP block. In fact, there are extra layers of metal in the die so that hackers cannot probe the chip without ruining it. Many of the chips also dither the supply current, so a hacker cannot infer the code it is running by observing the tiny variations in supply current as it runs.
Atmel makes symmetrical security chips, where both the chip and the microcontroller code know the secret key, and also asymmetrical security chips, which work like that public and private keys systems you might be familiar with such as PGP and RSA security. And, note that you can uses Atmel’s tiny inexpensive security chips with any microcontroller, 8-bit, 16-bit or 32-bit, including all the micros made by Atmel’s honored competitors.
Interested in more? You can watch the entire 1:1 interview with Vegard here.
IR night vision The door bell phone support IR night vision.
Again the IC 555 runs in the astable mode, creating flashing pulses at frequencies set by R1 and C1.
Although the wireless doorbell is not perfect, many people have found
it to be exactly what they are looking for in terms of performance
quality and functionality.