pvrank (version 1.1)

Security: Accessibility, security, and accuracy in statistical databases

Description

Effectiveness of security mechanisms for protecting numerical databases.

Usage

data(Security)

Format

A data frame with 40 observations on the following three variables.

OV

Original values.

AP

Additively perturbed.

MP

Multiplicatively perturbed.

Source

Muralidhar, K. and Batra, D. and Kirs, P. J. (1995). "Security, and accuracy in statistical databases: the case for the multiplicative fixed data perturbation approach". Management Science, 41, 1549--1564.

Details

The data set include a "true" series of values drawn from a lognormal population, sorted in ascending order. Data are perturbed by using the MP and the additive AP methods together with the relative position of the perturbed value.

Examples

	data(Security)
	head(Security)