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Tech the Future
The Future of IoT Security
One Size Doesn't Fit All
By Mike Lease

Security is one of the hot topics today in the Internet of Things (IoT). There have been well-publicized security breaches of consumer devices that include hijacked video from wireless baby monitors being posted on the Internet and home automation systems that reveal whether a home is occupied or not. A number of systems have been breached just to demonstrate their vulnerabilities. Less well publicized are security breaches of industrial equipment with much more severe consequences. These are rarely made public for obvious reasons. At first glance, it would seem that the existing security mechanism for the Internet and corporate networks would be an easy solution for IoT security. There are several problems with this. Continue Reading
July Code Challenge Answer
Sponsored by Programming Research (PRQA)

This particular problem is a logic problem and not something that would be caught by static analysis. It is a simple case of an off by one error where a loop continues too long because the logic of the "if" statement is incorrect. In this case the bounding number 1000 is not really supposed to be used, values are supposed to be "below" that value. The result in this case is the 1000 is divisible by 5 and is included in the sum when it should not be included. The problem is on line number 20 where the check is "<=" but should just be "<". See Winners 
News & Recent Posts

Wurth Elektronik now offers developers with a tool-Mix and Match-to help select the right transmitter and receiver coils. Mix and Match is a new tool in the RED EXPERT Toolbox. Also like the other tools in RED EXPERT, Mix and ... Continue reading →...»


Microchip Technology recently released a demonstration platform for the lowest-power Bluetooth Low Energy (BLE) sensor node. The platform features an ultra-low-power BTLC1000-certified module, a SMART SAM L21 Cortex-M0+ MCU, Bosch sensor technology, and a complete software solution. The BLE demonstration platform ... Continue reading →...»


Texas Instruments now offers the industry's first WPC v1.2 Qi-certified, 15-W wireless power transmitter. Intended to deliver high-power wireless charging to industrial systems (e.g., hand-held medical devices), the bq501210 enables 84% system efficiency with significantly less thermal dissipation. The bq501210's ... Continue reading →...»


STMicroelectronics has successfully certified its cryptographic library for STM32 microcontrollers as per the US Cryptographic Algorithm Validation Program (CAVP). An extension to the STM32Cube software package, the X-CUBE-CRYPTOLIB library is well suited for secure STM32-based applications, such as IoT devices, point-of-sale terminals, ... Continue reading →...»

Schematic Challenge Answer
Sponsored by Technologic Systems

There should be a diode in series with Q8's emitter. Without it, Q8 does not cut off completely when Q6 and Q7 are on. The diode provides a voltage offset that raises the effective threshold voltage for Q8. See Winners
Current Issue - See Inside

Circuit Cellar #313 August 2016

Q&A: Arduino-Based Smart Cities | Get Started with TM4C MCUs | Stepper Motor Emulator (Part 2) | IC Design Essentials | Contact Temperature Measurement | Cryptography & Power Analysis Attacks | IoT Security Tips | Intro to LoRa | Construct a Load Cell Circuit | And More

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Circuit Cellar is a media company that serves the international embedded design community with its products and services. As a reliable content provider for professional engineers and programmers, Circuit Cellar publishes Circuit Cellar magazine, engineering/programming-related books, a website, and a newsletter. Circuit Cellar also manages international design challenges relating to embedded design and programming. 

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