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What is a 'one time pad'?
A one-time pad is an encryption/deencryption method where a random series of cipher codes is used one time, and one time only, in a communication. Assuming that only the two parties possess their pairs of pads, then the encryption is unbreakable.
What are some Everyday items that were used in the 1870's?
One item was a washing board that looked like a pad with lines in it
What are two problems with the one-time pad?
The two problems are; 1. The One time pad needs to be truly random. Pseudo random generators are quick however they can be predicted. The second is practicability of being able to transmit the number of keys securely to the receiver. For every bit of plain text, there is also 1bit of key.
Should a upgraded carpet padding with a sheer plastic cover on one side have the plastic up or facing down toward the floor?
If the pad only has the plastic covering on one side it should be installed plastic side up. Depending on the type of plastic it could serve one or more purposes. The most basic of purposes would be to allow the carpet to be slid on the surface of the pad during the installation and to prevent damage during installation. The most advanced pads have a thicker plastic coating that acts as a boundary layer to prevent the pad from absorbing liquids that may be spilled on the carpet. This boundary layer allows for easier cleanup and helps prevent stains from reappearing after they have been removed.
How many bags of concrete would it take for 25 sq feet?
1 60lbs bag makes around a 1' by 1' by 3" thick pad..
