In turn, this key contains the âcypherâ, which dictates how the data encryption occurs. What is a cypher? A cypher is an algorithm for performing encryption and decryption â a series of steps to follow as a procedure. There are many different ways in which plaintext can be encrypted, but essentially there are two main processes used: symmetric key algorithms and asymmetric key algorithms . Algorithms . Symmetric key algorithms
The average price of a barrel of crude oil this year is $69.90. Prior to September 11th, 2001, oil cost $23 per barrel.This pricing difference has been attributed to the increasing difficulty to obtain oil from the Middle Eastern region, as well as the increasing shortage of oil supply throughout the world.he average price of a barrel of crude oil this year is $69.90. Prior to September 11th, 2001, oil cost $23 per barrel.
With 42 gallons in each barrel of oil, a $1 change in the price of a barrel of oil roughly translates to a 2.4-cent change per gallon at the pump. U.S. retail (regular) gasoline prices averaged a record $3.63 in 2012, and are expected to average $3.44 per gallon in 2013.On-road diesel fuel averaged a record $3.97 per gallon in 2012, and is expected to decrease to $3.87 per gallon in 2013.il. Oil demand in 2012 was 89.17 million barrels per day worldwide, an increase of 1.07 million barrels per day over 2011. Demand is projected to increase to 90.11 million barrels per day in 2013 and 91.46 million barrels per day in 2014.