My professional blog, a collection
of thoughts on software engineering,
engineering in general, science,
technology. Medical programming, embedded firmware, cryptography, networking, hardware, algorithms,
logic design, graphics and vision,
information theory, computer science.
13 September 2009
Crypto Dad: secret ink
I was asking the nearly 10 year old about secret inks, he confessed he once read of them and peed on a brush, painted paper, and then developed it on a lightbulb after drying.
I was amazed to learn this. It has lighted up my whole week.
