Last week, we ran a competition around a steganographic code that was used by the British during the Second Word War.
Take a secret military message, and wrap it up into a believable "letter home"... it's harder than it sounds!
Here's a video that might make you think twice about taking your laptop out into the world unencrypted.
This is "data theft" in the most literal sense...
Snapchat claims to let you share even "ugly selfies" because once they're viewed they "disappear forever."
US-based computer forensics geek Richard Hickman thought he'd find out how true that claim was...
If you were taken prisoner and wanted to send messages home under your captors' noses, what would you do?
Find out how a Royal Navy officer did just that during WW2, and have a go yourself at hiding a secret message in an innocent-sounding letter home!
IBM just released an open source software package called HELib.
HE stands for *homomorphic encryption*, and HELib is an important cryptographic milestone.
Paul Ducklin explains why...
An iPhone messaging app that claims to be "totally secure" is offering a £10,000 prize to anyone who can intercept a message from it.
Paul Ducklin wonders how you are supposed to win the prize if the app really is "totally secure"...
With WordPress.com powering more than 60 million websites worldwide, anything to improve the safety and security of its users is to be welcomed.
Paul Ducklin tries out the new WordPress 2FA service on his Naked Security account...
Why, and more importantly, *how*, would you go about weeding out rude passwords?
Surely an April Fool?
Paul Ducklin takes a look...
NetBSD recently patched a programming bug in its kernel that affected the sanctity of the operating system's random numbers.
One lousy parenthesis misplaced by just two characters...
It's that time of the week again - here's your roundup of everything we wrote in the last seven days.
Cryptographers have once again put SSL/TLS (that's the padlock in HTTPS) in their gunsights and opened fire.
This time, they've done some severe damage.
Paul Ducklin takes a detailed look...
For over 12 centuries an intense battle has been fought between the code-makers and the code-breakers. But despite decades of cryptanalysis, there are many ciphertexts which have gone unsolved, leaving us in mystery.
Here's our top ten list, can you solve them?
Will chilling an Android phone to -15°C freeze the encryption keys into memory? And if so, can you use a modified version of Android to dig them out?
German researchers had a crack at it - Paul Ducklin takes a look at how things turned out.
Get yourself up to date with everything we've written in the last seven days - it's weekly roundup time.
Have your joined thousands of others, and become a loyal listener to the "Chet Chat" yet?
Here's the latest Naked Security podcast, Sophos Security Chet Chat 102, discussing a range of recent and newsworthy topics from the world of computer security.