What can you get with $25? Your very own, cute little Raspberry Pi computer. What can you get with that, plus a little time, a few peripherals and some command-line know-how? Your very own Tor proxy and wireless access point.

Adafruit's got the goods with an instructional on turning a Raspberry Pi into an "Onion Pi" — a terminal loaded with some serious surveillance-vanquishing power. Essentially, Tor protects your privacy by letting you maintain your anonymity. It routes your Web traffic through various relays to conceal your location and identity, and it has been in use by parties legitimate (and not) whenever an incredibly high level of anonymity is needed.

The hardware required is pretty straightforward: You need the Pi computer, Ethernet cable, Wi-Fi adapter with antenna, the Raspbian OS saved on a SD card and a power supply. You can cobble most of that together from various sources — you might even have some of it lying around — or you could buy an Onion Pi Pack from Adafruit for $94.95. (A portion of the sales will be donated to the Tor Foundation.)

Users install Tor via the command line, edit the host access point (to, say, "Onion Pi") and change the password. A few more commands, an edit to the IP routing tables, and sha-bam — you're routing Wi-Fi connections through Tor. If you want to become an actual part of the network, you can even set up the Pi as a Tor relay.

While some organizations don't take too kindly to people hacking their kit, the Raspberry Pi Foundation seems pleased as punch if people could use this to "Foil the NSA and Prism with a Tor proxy."

If you prefer your security with a little less work, you could always go with something like Disconnect 2.

Latest And Best Prime Day Deals

It might be Prime Day, but this Instant Pot deal is available to everyone
Instant Pot 3-Quart Duo Mini Pressure Cooker
$39.95 $65.00 Save $25

This 3-quart multi-cooker is perfect for smaller households or serving sizes, and today's deal beats the others we've seen.

Unlock voice control with Echo device deals and $5 Amazon smart plugs
Amazon Echo devices bundled with $5 smart plugs

Amazon's Smart Plug lets you start voice controlling anything plugged into it by asking an Alexa-compatible device, and today's deal lets you snag one for only $5 with purchase of select Echo devices.

Be more productive with a year of Office 365 Home and a free $50 Amazon gift card
Office 365 Home 12-month subscription and $50 Amazon gift card
$99.99 $150.00 Save $50

The subscription works with up to six people, but that card can be all yours.

Amazon's Fire TV Cube is down to just $70 thanks to this Prime Day deal
Amazon Fire TV Cube
$69.99 $119.99 Save $50

Grab TCL's 32-inch 720p Roku TV for less than $100 in this Prime Day Lightning deal
TCL 32S325 32-inch 720p Roku TV
$99.99 $130.00 Save $30

Act fast while you can. These Lightning deals tend to sell out quick.

The Ring Alarm security system is reaching new low prices for Prime Day
Ring Alarm home security systems

Various configurations of the Ring Alarm are discounted to their best prices yet exclusively for Prime members at Amazon through Tuesday night to help keep your home secure.

The Sonos Beam Prime Day deal includes a $40 discount and 2 $50 Amazon gift cards
The Sonos Beam Prime Day deal includes a $40 discount and $100 in Amazon gift cards
$359.00 $499.00 Save $140

That's just so much savings in one deal. You'll have to wait for the physical gift cards, but that's basically $100 to spend however you want.

Prime Day dropped this PlayStation 4 console bundle to just $250
PlayStation 4 Slim 1TB console with Marvel's Spider-Man and Horizon Zero Dawn
$249.99 $359.98 Save $110

This deal on the PlayStation 4 Slim console saves you $50 off its regular price while also including Marvel's Spider-Man and Horizon Zero Dawn Complete Edition for free. You'll just need an Amazon Prime membership to snag it.

More Prime Day Deals