With reverberations from last year's News International phone hacking scandal still echoing in UK courtrooms, we thought it was time to take a look back at how you can make sure no one but you has access to your voicemail messages, and indeed the rest of your sensitive data.
Because today's smartphones so closely resemble computers, a lot of the best practices for the desktop apply to your Android or iPhone. If you don't have the new iPhone 5S, with its TouchID fingerprint scanner, these tips are still crucial to keeping your phone secure.
Here are five easy ways to keep your mobile data safe and secure.
1. Set a password
Take out your phone. Swipe to unlock it. If that's all it takes to get in, you're at risk. Sure, it's quicker to skip the passcode, but setting a lock on your phone is an easy way to protect your device—and your data—from prying eyes.
It's also an easy compromise: entering a passcode takes precisely two seconds, and those extra seconds will protect you in case of a barstool incident.
The next step, of course, is to ratchet up password security throughout your phone. If an application that accesses sensitive data requires a password, entering it manually gives you one more firewall between your mobile identity and everyone else.
2. Make it strong
We've covered a number of ways you can get the most out of your desktop passwords; the same basic rules apply on your phone. Avoid words you can find in the dictionary and try not to use numbers or letters in the order they appear on your keyboard (e.g. "12345" or "qwerty").
If it's personal, it's not powerful: Don't use friend, relative, or pet names, dates of import (birthday or anniversary), or cities or sports teams. If you have a riff on any of the following terms, change it now: "god," "money," "love," "monkey," "letmein," or "password."
Lingering doubts? Check the strength of your password with Microsoft's handy tool.
When it comes to the four-digit passcode in particular, here's a counterintuitive tip: repeat one of the numbers.
Because there will only be tap prints on three buttons, your security is (much) improved because a hacker would have to either guess the non-existent fourth number or locate the three independent numbers and pursue them in all their possible permutations. For the game theory behind the tip, check out this blog post on Mind Your Decisions.
3. Change it regularly
As with fashion, there's a password for every season. A good rule of thumb is to change your passwords every time you buy a new pair of socks. Be sure to diversify your passwords, also: You have different accounts, so why not different passwords? This way if one account gets hacked, the rest stay secure.
4. Require a voicemail PIN
If there's one thing that's clear from the News of the World hack, it's that potential intruders still care about voicemail. While mobile operators may not authenticate caller ID, changing your phone settings to require a PIN when checking your voicemail will put a barrier between you and a Caller ID Spoofer.
5. Stay current
In the case of both the iPhone tracking and DroidDream nightmares, mobile OS vulnerabilities were discovered and exploited, and countless vulnerabilities have been targeted since. In the aftermath, however, both Apple and Google released patches through OS updates that plugged the holes. Protecting yourself is as easy as staying current.
Sometimes this is easier said than done: Because manufacturers skin Android devices, not all updates roll out concurrently; however, once you do receive an upgrade notification, install it immediately — in addition to new features, you'll also ensure security.