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Equation 4 · Part 2 · AI and Cybersecurity in Practice: An Advanced Technical Guide

Symbol c

E=∑cpc dc.E = \sum_{c} p_c \, d_c.
cc

What this part means

c appears in the bound of this sum. The bound states where the repeated operation starts, ends, or which values it includes.

Its job in the formula

c appears in the bound of this sum. The bound states where the repeated operation starts, ends, or which values it includes.

The passage around this formula

There is a simple way to see why capability removal should be the default move rather than the fallback. Model the expected exposure created by a credential as a sum over the capabilities c it carries, each with some probability pcp_c that it is exploited in a given period and some damage dcd_c if it is: E=∑cpc dcE = \sum_{c} p_c \, d_c. Two of the terms in that sum are hard to know honestly. An estimate of pcp_c assumes a threat model that has to guess at an adversary’s behaviour, and dcd_c is only…

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Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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Sources cited in the article section

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