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.
Brent and WTI crude oil. September Brent crude oil futures rose by $0.07 and closed at $48.81 per barrel on August 18, 2015. In contrast, US WTI (West Texas Intermediate) crude oil futures contracts for September delivery rose by $0.75 and settled at $42.62 per barrel yesterday. The WTI and Brent differential was at $6.19 per barrel as of August 18, 2015. The average differential between WTI and Brent was at $6 per barrel in July 2015.