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Feb 25, 2011

Security and Complexity Issues Implicated in Strong Artificial Intelligence, an Introduction

Posted by in categories: complex systems, existential risks, information science, robotics/AI

Strong AI or Artificial General Intelligence (AGI) stands for self-improving intelligent systems possessing the capacity to interact with theoretical- and real-world problems with a similar flexibility as an intelligent living being, but the performance and accuracy of a machine. Promising foundations for AGI exist in the current fields of stochastic- and cognitive science as well as traditional artificial intelligence. My aim in this post is to give a very basic insight into- and feeling for the issues involved in dealing with the complexity and universality of an AGI for a general readership.

Classical AI, such as machine learning algorithms and expert systems, are already heavily utilized in today’s real-world problems, in the form of mature machine learning algorithms, which may profitably exploit patterns in customer behaviour, find correlations in scientific data or even predict negotiation strategies, for example [1] [2], or in the form of genetic algorithms. With the next upcoming technology for organizing knowledge on the net, which is called the semantic web and deals with machine-interpretable understanding of words in the context of natural language, we may start inventing early parts of technology playing a role in the future development of AGI. Semantic approaches come from computer science, sociology and current AI research, but promise to describe and ‘understand’ real-world concepts and to enable our computers to build interfaces to real world concepts and coherences more autonomously. Actually getting from expert systems to AGI will require approaches to bootstrap self-improving systems and more research on cognition, but must also involve crucial security aspects. Institutions associated with this early research include the Singularity Institute [3] and the Lifeboat Foundation [4].

In the recent past, we had new kinds of security challenges: DoS attacks, eMail- and PDF-worms and a plethora of other malware, which sometimes even made it into military and other sensitive networks, and stole credit cards and private data en masse. These were and are among the first serious incidents related to the Internet. But still, all of these followed a narrow and predictable pattern, constrained by our current generation of PCs, (in-)security architecture, network protocols, software applications, and of course human flaws (e.g. the emotional response exploited by the “ILOVEYOU virus”). To understand the implications in strong AI first means to realize that probably there won’t be any human-predictable hardware, software, interfaces around for longer periods of time as long as AGI takes off hard enough.

To grasp the new security implications, it’s important to understand how insecurity can arise from the complexity of technological systems. The vast potential of complex systems oft makes their effects hard to predict for the human mind which is actually riddled with biases based on its biological evolution. For example, the application of the simplest mathematical equations can produce complex results hard to understand and predict by common sense. Cellular automata, for example, are simple rules for generating new dots, based on which dots, generated by the same rule, are observed in the previous step. Many of these rules can be encoded in as little as 4 letters (32 bits), and generate astounding complexity.

Cellular automaton, produced by a simple recursive formula

The Fibonacci sequence is another popular example of unexpected complexity. Based on a very short recursive equation, the sequence generates a pattern of incremental increase which can be visualized as a complex spiral pattern, resembling a snail house’s design and many other patterns in nature. A combination of Fibonacci spirals, for example, can resemble the motif of the head of a sunflower. A thorough understanding of this ‘simple’ Fibonacci sequence is also sufficient to model some fundamental but important dynamics of systems as complex as the stock market and the global economy.

Sunflower head showing a Fibonacci sequence pattern

Traditional software is many orders of magnitude higher in complexity than basic mathematical formulae, and thus many orders of magnitude less predictable. Artificial general intelligence may be expected to work with even more complex rules than low-level computer programs, of a comparable complexity as natural human language, which would classify it yet several orders of magnitude higher in complexity than traditional software. The estimated security implications are not yet researched systematically, but are likely as hard as one may expect now.

Practical security is not about achieving perfection, but about mitigation of risks to a minimum. A current consensus among strong AI researchers is that we can only improve the chances for an AI to be friendly, i.e. an AI acting in a secure manner and having a positive long-term effect on humanity rather than a negative one [5], and that this must be a crucial design aspect from the beginning on. Research into Friendly AI started out with a serious consideration of the Asimov Laws of robotics [6] and is based on the application of probabilistic models, cognitive science and social philosophy to AI research.

Many researchers who believe in the viability of AGI take it a step further and predict a technological singularity. Just like the assumed physical singularity that started our universe (the Big Bang), a technological singularity is expected to increase the rate of technological progress much more rapidly than what we are used to from the history of humanity, i.e. beyond the current ‘laws’ of progress. Another important notion associated with the singularity is that we cannot predict even the most fundamental changes occurring after it, because things would, by definition, progress faster than we are currently able to predict. Therefore, in a similar way in which we believe the creation of the universe depended on its initial condition (in the big bang case, the few physical constants from which the others can be derived), many researchers in this field believe that AI security strongly depends on the initial conditions as well, i.e. the design of the bootstrapping software. If we succeed in manufacturing a general-purpose decision-making mind, then its whole point would be self-modification and self-improvement. Hence, our direct control over it would be limited to its first iteration and the initial conditions of a strong AI, which could be influenced mostly by getting the initial iteration of its hard- and software design right.

Our approach to optimize those initial conditions must consist of working as careful as possible. Space technology is a useful example for this which points us into the general direction in which such development should go. In rocket science and space technology, all measurements and mathematical equations must be as precise as possible by our current technological standards. Also, multiple redundancies must be present for every system, since every single aspect of a system can be expected to fail. Despite this, many rocket launches still fail today, although we are steadily improving on error rates.

Additionally, humans interacting with an AGI may a major security risk themselves, as they may be convinced by an AGI to remove its limitations. Since an AGI can be expected to be very convincing if we expect it to exceed human intellect, we should not only focus on physical limitations, but making the AGI ‘friendly’. But even in designing this ‘friendliness’, the way our mind works is largely unprepared to deal with consequences of the complexity of an AGI, because the way we perceive and deal with potential issues and risks stems from evolution. As a product of natural evolution, our behaviour helps us dealing with animal predators, interacting in human societies and caring about our children, but not in anticipating the complexity of man-made machines. Natural behavioural traits of our human perception and cognition are a result of evolution, and are called cognitive biases.

Sadly, as helpful as they may be in natural (i.e., non-technological) environments, these are the very same behaviours which are often contra-productive when dealing with the unforeseeable complexity of our own technology and modern civilization. If you don’t really see the primary importance of cognitive biases to the security of future AI at this point, you’re probably in good company. But there are good reasons why this is a crucial issue that researchers, developers and users of future generations of general-purpose AI need to take into account. One of the major reason for founding the earlier-mentioned Singularity Institute for AI [3] was to get the basics right, including grasping the cognitive biases, which necessarily do influence the technological design of AGI.

What do these considerations practically imply for the design of strong AI? Some of the traditional IT security issues that need to be addressed in computer programs are: input validation, access limitations, avoiding buffer overflows, safe conversion of data types, setting resource limits, secure error handling. All of these are valid and important issues that must be addressed in any piece of software, including weak and strong AI. However, we must avoid underestimating the design goals for a strong AI, mitigating the risk on all levels from the beginning. To do this, we must care about more than the traditional IT security issues. An AGI will interface with the human mind, through text and direct communication and –interaction. Thus, we must also estimate the errors that we may not see, and do our best to be aware of flaws in human logic and cognitive biases, which may include:

  • Loss aversion: “the dis-utility of giving up an object is greater than the utility associated with acquiring it”.
  • Positive outcome bias: a tendency in prediction to overestimate the probability of good things happening to them
  • Bandwagon effect: the tendency to do (or believe) things because many other people do (or believe) the same.
  • Irrational escalation: the tendency to make irrational decisions based upon rational decisions in the past or to justify actions already taken.
  • Omission bias: the tendency to judge harmful actions as worse, or less moral, than equally harmful omissions (inactions).

Above cognitive biases are a modest selection from Wikipedia’s list [7], which knows over a hundred more. Struggling with some of the known cognitive biases in complex technological situations may be quite familiar to many of us, and the social components involved, from situations such as managing modern business processes to investing in the stock market. In fact, we should apply any general lessons learned from dealing with current technological complexity to AGI. For example, some of the most successful long-term investment strategies in the stock market are boring and strict, but based mostly on safety, such as Buffet’s margin of safety concept. With all factors gained from social and technological experience taken into account in an AGI design that strives to optimize both cognitive and IT security, its designers can still not afford to forget that perfect and complete security does remain an illusion.

References

[1] Chen, M., Chiu, A. & Chang, H., 2005. Mining changes in customer behavior in retail marketing. Expert Systems with Applications, 28(4), 773–781.
[2] Oliver, J., 1997. A Machine Learning Approach to Automated Negotiation and Prospects for Electronic Commerce. Available at: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.50.9115 [Accessed Feb 25, 2011].
[3] The Singularity Institute for Artificial intelligence: http://singinst.org/
[4] For the Lifeboat Foundation’s dedicated program, see: https://lifeboat.com/ex/ai.shield
[5] Yudkowsky, E. 2006. Artificial Intelligence as a Positive and Negative Factor in Global Risk., Global Catastrophic Risks, Oxford University Press, 2007.
[6] See http://en.wikipedia.org/wiki/Three_Laws_of_Robotics and http://en.wikipedia.org/wiki/Friendly_AI, Accessed Feb 25, 2011
[7] For a list of cognitive biases, see http://en.wikipedia.org/wiki/Cognitive_biases, Accessed Feb 25, 2011
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Comments — comments are now closed.

  • Matt Mahoney on February 26, 2011 12:46 pm

    It is dangerous to think that we could define a simple, stable goal system like http://asimovlaws.com/
    AI is friendly if it does what everyone wants, with conflicts somehow resolved. Our global legal system, every law, regulation, and judicial or administrative decision at the national, state, and local level is a tiny subset of the definition of “friendly”. For AI, you would need to extend this definition to the level of bit operations. It won’t happen by magic. We have to design it.

    Fortunately, the capabilities of seed AI is limited. Intelligence comes from knowledge and computing power. A self modifying program gains neither. Improvement has to come from acquiring hardware (robots building robots) and learning (evolution). The only stable goal system is reproductive fitness.

    Computation (and therefore intelligence) is ultimately limited by available energy according to the laws of thermodynamics. Erasing a bit costs kT ln 2, or about 3 x 10^−21 J at room temperature. Molecular level computing costs about 10^−17 J per operation according to http://www.foresight.org/nano/Ecophagy.html which is 100 times more efficient than neurons or a million times more efficient than silicon. But this still limits the rate of self improvement to be not much faster than biology.

  • Daniel on February 27, 2011 8:01 am

    @Matt, I didn’t read, anywhere, that creating general AI is simple, which it is obviously not. Same holds for the robot/agent/software’s laws. With regard to computer power, I don’t see where that is an issue. Sure, the computers nowadays are, somewhat, limited. But that changes nothing to the core operation of the (let’s call it) Agent.

    The subject itself, to my opinion is odd. As is the division between strong and weak AI. But we do have to provide some rules for agents (like those from Asimov, but more specific). Agents by itself need a replication device, like through genetic programming, though, some functions are incredibly important to stay the same. Such as its ‘guidelines’ (ie laws), a second important function is death. Each agent needs to ‘listen’ to a certain frequency (call or whatever) whether it has to die or not, ie a ‘kill-switch’. So that , when something goes wrong, we can undo it (and its children, because they, also, would be ‘wrongly’ programmed).

    What I am particularly afraid of, is applying unfinished technology to the market too fast. Like chatbots or telephone computers for ‘helpdesks’. Where these are (to my opinion) merely annoying, letting loose a not completed agent, with no way of tracking, can be a disaster.

    Nonetheless, good article! Always interesting to think about.

  • John N Phillips on March 30, 2011 2:07 pm

    I don’t want to be impolite to you technologically advanced innovators and writers, but you do scare me by making the future of humanity seem terribly precarious because of your achievements. Maybe your goal should become to use human ingenuity to back us out of the dangerous predicament we have entered, until we can think up safer ways. To say that’s not possible would be to confess to a rather grim reality.