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.
On September 22, oil rose over $25 to $130 before settling again to $120.92, marking a record one-day gain of $16.37. Electronic crude oil trading was temporarily halted by NYMEX when the daily price rise limit of $10 was reached, but the limit was reset seconds later and trading resumed.By October 16, prices had fallen again to below $70, and on November 6 oil closed below $60.nited States crude oil prices averaged $30 a barrel in 2003 due to political instability within various oil producing nations. It rose 19% from the average in 2002. The 2003 invasion of Iraq marked a significant event for oil markets because Iraq contains a large amount of global oil reserves.