Readers of a certain age will remember those 'invisible ink' spy toys that let you write a 'secret' message which would only appear after rubbing the page with half of a lemon. Yeah, this is not that.

This article is part of EDN and EE Times’ Hot Technologies: Looking ahead to 2015 feature, where our editors examine some of the hot trends and technologies in 2014 that promise to shape technology ...

Ink containing polymers that can store data has been used to write a letter containing a hidden message – the encryption key to unlock a text file of L. Frank Baum’s The Wonderful Wizard of Oz. Eric ...

What secret alchemical knowledge could be so important it required sophisticated encryption? The setting was Amsterdam, 2019. A conference organized by the Society for the History of Alchemy and ...

You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

The Diffie-Hellman algorithm was a stunning breakthrough in cryptography that showed cryptographic keys could be securely exchanged in plain sight. Here’s how it works. Whitfield Diffie and Martin ...

Addonics Technologies on Thursday introduced Cipher Ultra DigiDrive (UDD), a hardware-based encryption reader and writer used to secure data on Flash media. It’s priced from $79 to $175 depending on ...