Secure HTTPS connections with Arduino

Hi Andy,

frankly I had no idea that a similar module was already existing for the Yun but it is not uncommon that with slow processors and micro controllers VS computers the remote communication is secured with an encryption IC. There are many and the same Atmel, but also Nordic and NXP produce good ones at a very low price.

Another more flexible approach that I have already used in past for a very tiny linux board developed for the Nintendo WII II (was running OpenWRT linux distribution) is based on the FPGA, eventually in conjunction with and encryption IC. In this way there is the advantage of a very high flexibility in the firmware / software development always keeping the security level at a very high standard.

Last but not least - referring to some previous posts about the costs of the trusted certificates respect the untrusted open cert - this is a low-cost reliable method without the need of a certification authority for data encryption.

In one of my previous lifes when I was a Alcatel network specialist I remember that this is just the most common method that the high-end WAN networking Cisco devices uses to grant the highest security level (e.g. in the PIX Cisco Firewalls and the big routers collecting data through the SNMP protocol).

Enrico

Enrico, the Yún is effectively an Arduino Leonardo with a OpenWRT router soldered on the top, the problem I had was the boot time of 60s and the high power requirement of 300mA. If it could be made to sleep or if it booted faster then that would work. I don't know how long typical OpenWRT boards take to boot but I've also heard that the micro routers such as the TP-Link Nano can be used in this case.

Andy,

if your boot time is 60s it is too long for the OpenWRT (I don't know the Yun). But do you have investigated if this is normal or not around the world? Or you think it may depend on your specific hardware configuration ? I remember that with a reasonable strong series of applications this small thing was booting almost immediately (few seconds). The linux side on the chip is something closed or can be managed in some way? If you need more details for a comparation I have here the prototype and sources etc. so I can make some "revival" tests, hopefully

45 to 60s is about normal for the Yún depending on if you have an SDCard installed see Booting the Yún

45 to 60s is about normal for the Yún depending on if you have an SDCard installed see Booting the Yún

Thank you. This was my concern, it is your need a faster boot. I have no idea of the kernel version you are using and how the OpenWRT starts and runs, but if I am not wrong there is a way to set the linux to go in power saving / standby while certain conditions are verified. As this depends also by the processor features on the linux side I think it is the worth to investigate a bit.

Enrico

The Atheros AR9331 module on the Yún does have sleeping/low power capability but I think it would be simpler to start with a module such as the one above and build on that rather than trying to coerce the Yún into doing something it was clearly not designed to do.