There’s a disturbing trend in the past year or so of various VPN companies advertising to the general, non-technical public. It’s great that the general public is starting to become more aware of their privacy online, but I’m not a fan of these companies exploiting public paranoia to peddle their wares. Using a VPN in the first place has potentially grave consequences for your privacy - and can often be worse than not using one in the first place.
It’s true that, generally speaking, when you use a VPN, the websites you visit don’t have access to your original IP address, which can be used to derive your approximate location (often not more specific than your city or neighborhood). But that’s not true of the VPN provider themselves - who can identify you much more precisely because you used your VPN login to access the service. Additionally, they can promise not to siphon off your data and write it down somewhere - tracking you, selling it to advertisers, handing it over to law enforcement - but they could and you’d be none the wiser. By routing all of your traffic through a VPN, you route all of your traffic through a VPN.
Another advantage offered by VPNs is that they can prevent your ISP from knowing what you’re doing online. If you don’t trust your ISP but you do trust your VPN, this makes a lot of sense. It also makes sense if you’re on an unfamiliar network, like airport WiFi. However, it’s still quite important that you do trust the VPN on the other end. You need to do research. What country are they based in, and what’s their diplomatic relationship with your home country? What kind of power the local authorities have to force them to record & disclose your traffic? Are they backed by venture capitalists who expect infinite growth, and will they eventually have to meet those demands by way of selling your information to advertisers? What happens to you when their business is going poorly? How much do you trust their security competency - are they likely to be hacked? If you haven’t answered all of these questions yourself, then you should not use a VPN.
Even more alarming than the large advertising campaigns which have been popular in the past few months is push-button VPN services which are coming pre-installed on consumer hardware and software. These bother me because they’re implemented by programmers who should understand this stuff and know better than to write the code. Opera now has a push-button VPN pre-bundled which is free and tells you little about the service before happily sending all of your traffic through it. Do you trust a Chinese web browser’s free VPN to behave in your best interests? Purism also recently announced a collaboration with Private Internet Access to ship a VPN in their upcoming Librem 5. I consider this highly irresponsible of Purism, and actually discussed the matter at some length with Todd Weaver (the CEO) over email. We need to stop making it easy for users to siphon all of their data into the hands of someone they don’t know.
For anyone who needs a VPN but isn’t comfortable using one of these companies, there are other choices. First, consider that any website you visit with HTTPs support (identified by the little green lock in the address bar on your web browser) is already encrypting all of your traffic so it cannot be read or tampered with. This discloses your IP address to the operator of that website and discloses that you visited that website to your ISP, but does not disclose any data you sent to them, or any content they sent to you, to your ISP or any eavesdroppers. If you’re careful to use HTTPS (and other forms of SSL for things like email), that can often be enough.1
If that’s not enough, the ironclad solution is Tor. When you connect to a website on Tor, it (1) hides your IP address from the website and any eavesdroppers, (2) hides who you’re talking to from your ISP, and (3) hides what you’re talking about from the ISP. In some cases (onion services), it even hides the origin of the service you’re talking to from you. Tor comes with its own set of limitations and pitfalls for privacy & security, which you should read about and understand before using it. Bad actors on the Tor network can read and tamper with your traffic if you aren’t using SSL or Onion routing.
Finally, if you have some technical know-how, you can set up your own VPN. If you have a server somewhere (or rent one from a VPS provider), you can install a VPN on it. I suggest Wireguard (easiest, Linux only) or OpenVPN (more difficult, works on everything). Once again, this comes with its own limitations. You’ll always be using a consistent IP address that services you visit can remember to track you, and you get a new ISP (whoever your VPS provider uses). This’ll generally route you through commercial ISPs, though, who are much less likely to do obnoxious crap like injecting ads in webpages or redirecting your failed DNS queries to “search results” (i.e. more ads). You’ll need to vet your VPS provider and their ISP with equal care.
Understand who handles your data - encrypted and unencrypted - before you share it. No matter your approach, you should also always install an adblocker (I strongly recommend uBlock Origin), stick to HTTPS-enabled websites, and be suspicious of and diligent about every piece of software, every browser extension, every app you install, and every website you visit. Most of them are trying to spy on you.
- VPN - a Very Precarious Narrative - Dennis Schubert
- The trustworthy of VPN review sites and how affiliate programs affects their opinion
A reader points out that HTTPS can also be tampered with. If someone else administrates your computer (such as your employer), they can install custom certificates that allow them to tamper with your traffic. This is also sometimes done by software you install on your system, like antivirus software (which more times than not, is a virus itself). Additionally, anyone who can strongarm a certificate authority (state actors) may be able to issue an illegitimate certificate for the same purpose. The only communication method I know of which has no known flaws is onion routing on Tor. ↩
Articles from blogs I follow around the net
We are excited to launch the new Go official swag and merch store shipping worldwide. We are even more excited to announce that 100% of the proceeds from the Go store go directly to GoBridge. GoBridge is a non-profit organization focused on building bridges…via The Go Programming Language Blog July 18, 2019
This is a psuedo-transcript for a talk given at Deconstruct 2019. To make this accessible for people on slow connections as well as people using screen readers, the slides have been replaced by in-line text (the talk has ~120 slides; at an average of 20 k…via Dan Luu July 12, 2019
This post gives an overview of the recent updates to the Writing an OS in Rust blog and the used libraries and tools. My focus this month was to finish the Heap Allocation post, on which I had been working since March. I originally wanted to include a sect…via Writing an OS in Rust July 6, 2019
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