People have always wanted to communicate privately. There once was a time when regular ink was secret enough, because not much of the world knew how to read. Then literacy ruined it for everyone, and ...

Coded messages in invisible ink sound like something only found in espionage books, but in real life, they can have important security purposes. Yet, they can be cracked if their encryption is ...

Coded messages in invisible ink sound like something only found in espionage books, but in real life, they can have important security purposes. Yet, they can be cracked if their encryption is ...

A team of researchers from the Harbin Institute of Technology in China have developed a system by which invisible ink and a basic cipher can be combined with relatively simple AI to create an ...

Indelible ink, the purple stain that billions of Indians show off during elections, may face an invisible challenger in the near future. The Delhi-based National Physical Laboratory (NPL), the creator ...

A lead-based ink can be used to print invisible messages that become legible when decrypted with a chemical trigger. Conventional ‘invisible’ inks are not very secure, because they are easily read ...

Invisible inks based on “smart” fluorescent materials have been shining brightly (if only you could see them) in the data-encryption/decryption arena lately ...

After writing the characters, the paper is allowed to dry at ambient conditions for four hours. (Reuters) Scientists at Shiv Nadar University here have developed a low-cost security ink that may help ...

Fraser Stoddart is affiliated with Northwestern University. Chenfeng Ke is affiliated with Northwestern University. Xisen Hou does not work for, consult, own shares in or receive funding from any ...