# What is the fastest way to generate a truly random one-time pad without electrical or any other complicated device?

I want to generate a truly random one-time pad as fast as possible, but without the use of any electrical or any other complicated device. What is the fastest way to do that?

• Take 128 coins and put them in a container , shake vigorously for 30 seconds. Reach into the container without looking ( ;-) ) and withdraw the coins one by one , marking down on a piece of paper heads or tails . You will now have a perfectly random 128 bit key. – William Hird Jul 19 '18 at 13:04
• How large a OTP are you after? Clearly without electricity, kBytes of material is going to be tricky & boring. – Paul Uszak Jul 19 '18 at 21:14
• @PaulUszak I disagree. A dozen 120-sided dice in a box can be used to quickly get a lot of numbers. – forest Jul 20 '18 at 4:13
• @PaulUszak OTP should be used to send small text messages. Nearly 100 messages. – vasili111 Jul 20 '18 at 8:21
• @PaulUszak Wait, what? An OTP doesn't have a "security level". A 112,000 bit OTP doesn't have a "security level" of $2^{112000}$, because it's already information-theoretic secure... – forest Jul 20 '18 at 22:15