From time to time, I get disappointed how much effort and money is put into securing computers, networks, mobile phones, ... and yet in 2016 here we are, where not much has changed on the defensive side. There are many things I personally blame for this situation, and one of them are the security tips.
The goal of these security tips is that if the average user follows these easy to remember rules, their computer will be safe. Unfortunately, by the time people integrate these rules into their daily life, these rules either become outdated, or these rules were so oversimplified that it was never true in the first place. Some of these security tips might sound ridiculous to people in InfoSec nowadays, but this is exactly what people still remember because we told them so for years.
PDF is safe to open
This is an oldie. I think this started at the time of macro viruses. Still, people think opening a PDF from an untrusted source is safer than opening a Word file. For details why this is not true, check: https://www.cvedetails.com/vulnerability-list/vendor_id-53/product_id-497/Adobe-Acrobat-Reader.html
On an unrelated note, people still believe PDF is integrity protected because the content cannot be changed (compered to a Word document).
|Image stolen from Kaspersky|
Java is secure
One of the best ones. Oracle started marketing Java as a safe language, where buffer overflows, format strings and pointer based vulnerabilities are gone. Unfortunately they forgot to tell the world that instead of "unsafe programs developed by others" they installed their unsafe program on 3 billion devices.
Stay away from rogue websites and you will be safe
This is a very common belief I hear from average people. "I only visit some trusted news sites and social media, I never visit those shady sites." I have some bad news. At the time of malvertising and infected websites, you don't have to visit those shady sites anymore to get infected.
Don't use open WiFi
I have a very long explanation why this makes no sense, see here. Actually, the whole recommendation makes no sense as people will connect to public WiFis, no matter what we (InfoSec) recommend.
The password policy nightmare
Actually this topic has been covered by myself in two blog posts, see here and here. Long story short: use a password manager and 2 factor authentication wherever possible. Let the password manager choose the password for you. And last but not least, corporate password policy sux.
Sites with a padlock are safe
We tell people for years that the communication with HTTPS sites are safe, and you can be sure it is HTTPS by finding a randomly changing padlock icon somewhere next to the URL. What people hear is that sites with padlocks are safe. Whatever that means. Same goes for WiFi - a network with a padlock is safe.
Use Linux, it is free from malware
For years people told to Windows users that only if they would use Linux they won't have so much malware. Thanks to Android, now everyone on the world can enjoy malware on his/her Linux machine.
OSX is free from malware
It is true that there is significantly less malware on OSX than on Windows, but this is an "economical" question rather than a "security" one. The more people use OSX, the better target it will become. Some people even believe they are safe from phishing because they are using a Mac!
Updated AV + firewall makes me 100% safe
There is no such thing as 100% safe, and unfortunately nowadays most malware is written for PROFIT, which means it can bypass these basic protections for days (or weeks, months, years). The more proactive protection is built into the product, the better!
How to backup data
Although this is one of the most important security tip which is not followed by people, my problem here is not the backup data advise, but how we as a community failed to provide easy to use ways to do that. Now that crypto-ransomware is a real threat to every Windows (and some OSX) users, even those people who have backups on their NAS can find their backups lost. The only hope is that at least OSX has Time Machine which is not targeted yet, and the only backup solution which really works.
The worst part is that we even created NAS devices which can be infected via worms ...
Disconnect your computer from the Internet when not used
There is no need to comment this. Whoever recommends things like that, clearly has a problem.
Use (free) VPN to protect your anonimity
First of all. There is no such thing as free service. If it is free, you are the service. On another hand, non-free VPN can introduce new vulnerablities, and they won't protect your anonimity. It replaces one ISP with another (your VPN provider). Even TOR cannot guarantee anonimity by itself, and VPNs are much worse.
The corporate "security tips" myth
"Luckily" these toxic security tips have infected the enterprise environment as well, not just the home users.
Use robots.txt to hide secret information on public websites
It is 2016 and somehow web developers still believe in this nonsense. And this is why this is usually the first to check on a website for penetration testers or attackers.
My password policy is safer than ever
As previously discussed, passwords are bad. Very bad. And they will stick with us for decades ...
Use WAF, IDS, IPS, Nextgen APT detection hibber-gibber and you will be safe
Companies should invest more into people and less into magic blinking devices.
Instead of shipping computers with bloatware, ship computers with exploit protection software
Teach people how to use a password safe
Teach people how to use 2FA
Teach people how to use common-sense
Computer security is complex, hard and the risks change every year. Is this our fault? Probably. But these kind of security tips won't help us save the world.