Local Structures for Global Security

Ferenc FriedlerUniversity of Pannonia, Veszprém, Hungary

September 17-18, 2012Duna Palota, Budapest

Outline

Introduction Recent disasters and potential risks Definitions General goals Sources of risks Security and PSE Contributions Concluding remarks

Preliminary Comment

Even a cultural activity can generate global disaster.

Introduction

Security is a global issue Global solution is not available Highly interdisciplinary, enormous literature Process systems engineering (PSE) Structure decomposition Security from engineering perspective Cooperation between experts of specific areas „Think globally, act locally”

Recent disasters

Breakdown of Internet in Hungary (April 30, 2012) 77 million user’s data stolen from Sony PlayStation

Network (2011) Fukushima nuclear power station catastrophe (2011) Pakistan knocked YouTube offline for two hours (2008) LA Airport 17 thousand flights grounded (2007) Power grid breakdown, NY (2003) Düsseldorf Airport fire (1996) Ariane 5 failure (1996)

 

Potential risks

Aircrafts are on the internet (disaster without explosives) Power grid long-term breakdown Cars and trucks can be directed and controlled through

internet Chemical plant disaster Loss of strategic database

Types of risks

- Cultural- Technical- Helth- Internet- Environment- Military- Political

Comment: any injury or loss in an area can affect another areas, i.e., security is considered to be multidimensional

 

Definitions

Security: the state of being free from danger or threat (Oxford Dictionary)

Security is the process or means, physical or human, of delaying, preventing, and otherwise protecting against external or internal, defects, dangers, loss, criminals, and other individuals or actions that threaten, hinder or destroy an organization’s “steady state,” and deprive it of its intended purpose for being

Security and safety will be considered together in this presentation

Focus is on the engineering aspects of security and safety

General goals

Minimize the risk of failure (crisis, catastrophe) Minimize the loss of failure (crisis or catastrophe) Minimize the cost of safety

Sources of risks

Natural and human activities are the sources of risks and threats

Types of activities: transformation (e.g., data base management, production of

gasoline from crude oil, earth-quake) flow (crude oil in a pipe line, electricity on the network,

information on the internet, cunami in the ocean)

Both transformations and flows are subject to - faulty, - unwanted or - unexpected

operations primarily because of design, maintenance, and operations problems.

Possible way of reducing the risks is to assure the quality of the activities

In practice, it is impossible, must not consider Activities are interconnected and interdependent, therefore,

risks are global

Risk is exploding

Complexity increasing rapidly (introducing new types of services among the available activities)

Unnecessary activities (refrigerator on the internet) Lack of quality control (speed is preferred to quality) Increasing gap between the available tools (mathematical or

technical) and the complexity of the security issue 

Contradiction?

Security is global, cannot be solved locally Global solution is needed The solution should be systematic based on mathematical

model (instead of intuitive) Global mathematical model is not solvable

Solution: Back to the basics (G. Polya) Consider process systems engineering (PSE)

Security and PSE

PSE: Process Systems Engineering Security from PSE perspectives Initialized by the chemical industry of the 1970’s Motivated by the competition (energy crisis), safety, etc. Fundamental tool: global problem is solved as a sequence of

smaller subproblems Basis of the decomposition: structure of the system Illustrative examples:

Systematic vs. intuitive solution Structure is crutial Importance of the mathematical model

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Systematic vs. intuitive solution

Comp. Chem. Eng., 1995Incomplete superstructureCost: 138.7*

* Other school’s work

Comp. Chem. Eng., 2000Complete superstructureCost: 104.3**

** Our work (optimality guaranteed)

Why structure is crutial?

“The selection of the structure can typically

reduce energy consumption by 50% and net-

present cost by 35%” (Siirola, 1996)

Importance of the mathematical model

Optimal network Kovacs, Z., F. Friedler, and L. T. Fan, Recycling in a Separation Process

Structure, AIChE J., 39, 1087-1089 (1993) 17

Axioms of combinatorially feasible structures

For PNS problem (P,R,O) a P-graph (m,o) satisfying the following five axioms is a combinatorially feasible network.

(S1) P m(S2) xm, d-(x)=0 iff xR(S3) oO(S4) y0o path [y0, yn] where ynP(S5) xm, (,)o such that x()

Reduction of the search space

The five axioms reduce the 34 billion combinations of the operating units to

3,465 combinatorially feasible structuresfor the industrial process synthesis problem of 35 op. units.

The optimal solution is included in the set of 3465 feasible structures.

19

20

Reduction of the search space

10.000 x

PSE in practice

Example: no chemical process is develobed before it is simulated and analysed by a computer simulation program since 1980s

Even a chemical process is too complex to describe its behaviour by an overall mathematical model. It is decomposed: local structures for the global problem

UP’s contribution

Research and Development P-graph framework for PSE Dynamic evaquation Synthesis and analysis of integrated security systems Design of optimal systems under reliability constraints Supply chain management under safety requirements Integrated synthesis of a process and its fault-tolerant

control system Sustainable process design

Organization: Research and Development Center for Security Cooperation: Experts in specific areas are welcome

Concluding remarks

Security is a global issue Systematic methodology is required for

minimizing the risk minimizing the loss minimizing the cost

Unavailable PSE is a potential technology Key point: decomposition for local structures

Thank you for your attention