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.
Republished: August 5, 2013, 9:50 a.m.: Text was modified to clarify content. Spot prices for benchmarks West Texas Intermediate (WTI) and North Sea Brent crude oil neared parity of around $109 per barrel July 19, and the Brent-WTI spread was still as close as $4 on July 30.y contrast, the average Brent-WTI price spread in 2012 was about $19 per barrel, and the spread was $23 per barrel as recently as February 2013.