U215-A PRINTER

U215-A PRINTER

ion without authorization; illegal disassemble or modify IC card so as to change data. Apart from the abov fuel dispenser e methods there are some professional attacks mainly for operating system. IC card intellectual Prevention technology mainly contains two aspects: one is for IC card itself including physical safety; the other is for information exchange process. In order to ensure the physical fuel dispenser safety of IC card, some safety technologies are adopted in manufacture of card base, such as laser engraving, fluorescent printing and macroline technology. As for possible attacks, chip manufacturers have researched many methods: Inspection of exterior voltage; Inspection of low frequency of clock; Preventing information of data bus being pick through supervision programme; Protecting memory by logical encryption; Fuse protection; Mounting encrypted calculating processor for chip. The above safety technologies are belongs to hardware aspect. Whichever technology provided for hardware platform, the prevention technologies of differential power analysis (DPA) and simple power analysis (SPA) should be considered in software. COS safety mechanism The purpose of COS safety protection aims at protection information on card and exchanged between terminal and card. Therefore, safety mechanism should be able to effectively con fuel dispenser trol information, which is considered in two aspects: One is to control the right to operate information, that is, who is authorized to operate information; the other is to process information itself, that is, encryption processing by which unauthorized person is unknown to its contents, even though he or she has got information. Other methods include: adopting enhanced Data Encryption Standard (DES) calculation in operating system; memory adopts special encryption; employing specific I/O technique to prevent Differential Power Analysis (DPA) attack. The control of right to operation of COS basically is divided into two categories: authentication mechanism and safety report mechanism. In real appli

lies　　 Delivery hose assemblies shall be provided and installed according to EN 1360 or prEN 134 fuel dispenser 83.　　 All leakage from delivery hose assemblies and end joints shall be visible without the removal of covers. This　　 requirement does not prevent the use of hose anti kinking sleeves andor other devices.　　 Anti kinking sleeves fitted to delivery fuel dispenser hose assemblies and other devices covering delivery hose assemblies shall　　 be constructed such that they allow ventilation and evaporation of liquid fuel even if some shrinkage occurs.　　 5.3.4.4 Air andor vapour separator(s)　　 Any air andor vapour separated by the air andor vapour separator shall be either exhausted through a vent pipe　　 terminating inside or outside the hydraulic housing or be connected to a vapour pipe.　　 A means shall be provided to prevent the ejection of liquid fuel through the vent pipe of the air andor vapour　　 separator.　　 5.3.4.5 Float　　 Floats in a system that can become pressurised shall be pressure tested at 1 4 MPa (14 bar) for 60 s. After　　 pressure test floats shall be undistorted as viewed by an eye of normal visual acuity and shall fuel dispenser function as　　 specified.　　 26　　　　　　 5.3.4.6 Sight glass　　 If a sight glass is fitted it shall be tested according to 6.1.2 and shall meet the following requirements:　　 When tested according to 6.1.2.2 there shall be no visible crack.　　 When tested according to 6.1.2.3 there shall be no visible crack.　　 When tested according to 6.1.2.4 there shall be no quantifiable sign of leakage.　　 5.3.4.7 Shear valve　　 All dispensers connected to a single or multiple outlet pressure source such as a

t happened in Lebanon s civil war, but there the stakes were lower. Given the unappetising prospect eith fuel dispenser er of staying the course or leaving at once, Americans long for a middle way. Why not split the country into Shia, Sunni and Kurdish statelets? Instead of going right now, why not set a timetable, to galvanise the warring parties to settle their differences before a free-for-all? fuel dispenser One far-fetched idea from the Iraq Study Group, a bipartisan team looking at alternatives on behalf of Congress, is said to be to withdraw “over the horizon�and control Iraq from a neighbouring country. Another is for America to be less fastidious about establishing democracy, and concentrate on the smaller aim of establishing a government that works. It is no bad thing to explore new ideas. The trouble is that none of these examples stands up to scrutiny. Take partition. This is not a mad idea. A case can be made that Britain s creation in the 1920s of a single political entity called Iraq was a failure from the start, and that the only thing that can hold it together is an iron fist like Saddam Hussein s. So if the choice is between another dictatorship or endless civil war, partition begins to look attractive. If not a mad idea, however, partition is a bad idea. It would be neither neat nor bloodless Kurds, Shias fuel dispenser and Sunnis are intermingled in many areas, including Baghdad. And the precedents are awful. In Palestine, India and Yugoslavia partition led not just to war and forced migration but to a series of wars. And there is, again, the complication of neighbours. Independence for the Kurds is anathema to Turkey and Iran. A Shia state on its border, adjacent to where its own restive Shias live, would horrify Saudi Arabia. And what would the Sunnis in Iraq s centre gain once partition cut them off from Iraq s oil riches? As for America being less fastidious about democracy, this sounds commendably realistic. Iraqis living in daily fear of murder certainly have bigger things to worry about than a lo