sdcMicro (version 4.5.0)

indivRisk: Individual Risk computation

Description

Individual risk computation.

Usage

indivRisk(x, method = "approx", qual = 1, survey=TRUE)

Arguments

x

object from class freqCalc

method

approx (default) or exact

qual

final correction factor

survey

TRUE, if one have survey data and FALSE if one deal with the whole population.

Value

• rk
  base individual risk
• method
  method
• qual
  final correction factor
• fk
  frequency count
• knames
  colnames of the key variables

Details

Estimation of the risk for each observation. After the risk is computed one can use e.g. the function localSuppr() for the protection of values of high risk. Further details can be found at the link given below.

S4 class sdcMicro objects are only supported by function measure_risk that also estimates the individual risk with the same method.

References

Franconi, L. and Polettini, S. (2004) Individual risk estimation in mu-Argus: a review. Privacy in Statistical Databases, Lecture Notes in Computer Science, 262--272. Springer

Machanavajjhala, A. and Kifer, D. and Gehrke, J. and Venkitasubramaniam, M. (2007) l-Diversity: Privacy Beyond k-Anonymity. ACM Trans. Knowl. Discov. Data, 1(1) additionally, have a look at the vignettes of sdcMicro for further reading.

See Also

measure_risk, freqCalc

Examples

## example from Capobianchi, Polettini and Lucarelli:
data(francdat)
f <- freqCalc(francdat, keyVars=c(2,4,5,6),w=8)
f
f$fk
f$Fk
## individual risk calculation:
indivf <- indivRisk(f)  
indivf$rk