Changelog

The changelog for current versions of ARX is available on our GitHub page.

ARX 3.7.1

Bugfixes

• Prevent exception when using Differential Privacy

ARX 3.7.0

New Features

• Core: Added method for clustering-based microaggregation
• Core: Added method specifying for functional transformation rules for dates
• Core: Added methods for risk assessment using wildcard matching
• Core: Added methods for applying local data transformation schemes
• Core: Added new types of privacy-preserving classification models
• Core: Added new methods for analyzing the accuracy of privacy-preserving classification models
• Core: New method for optimizing output data to improve the accuracy of privacy-preserving classification models
• Core: New methods supporting the quantitative analysis of the quality of output data
• GUI: Added wizard for creating transformation rules for dates
• GUI: Added dialog for local data transformation, cell suppression and microaggregation
• GUI: Added new views for visualizing accuracy estimates of classification models
• GUI: New view for quantitative analyses of data quality

Enhancements

• Core: Improved performance of t-closeness for ordered attributes
• Core: Reduced memory consumption
• GUI: Improved control over asynchronous analyses
• GUI: Improved execution time estimates for long-running tasks
• Various minor improvements

Bugfixes

• Various minor bugfixes

ARX 3.6.0

New features

• Core: Implement hierarchy builder for dates
• Core: Implement new privacy models (basic and enhanced beta-likeness)
• Core: Implement method for generating reports
• GUI: Implement dialog for building hierarchies for dates

Enhancements

• GUI: Add locale to data types
• GUI: Improve performance of preview
• GUI: Show attribute types when displaying features and classes
• Core: Implement additional method for optimizing output data
• Core: Extend summary statistics
• Core: Add f-score to classification analysis
• Various minor improvements

Bugfixes

• Core: Fix domain share for interval-based transformations
• GUI: Fix memory and resource leaks
• GUI: Fix row height of table
• Various minor bugfixes

ARX 3.5.1

Bugfixes

• GUI: Fix bug which prevented the use of local recoding
• GUI: Fix bug which prevented the use of delta-presence
• Core: Handle floating point issues in game theoretic cost/benefit model

ARX 3.5.0

New features

• Core: Implement new method for considering the impact of microaggregation on data quality
• Core: Implement game-theoretic approach for optimizing the profitability of publishing de-identified data based on cost/benefit analyses
• Core: Implement record-level entropy-based model for measuring information loss
• Core: Implement corrected Grassberger estimator for entropy-l-diversity
• Core: Implement t-closeness for numeric attributes
• Core: Implement alpha-distinction and beta-separation for detecting quasi-identifiers

Enhancements

• GUI: Improve synchronization of tables
• Various minor improvements

Bugfixes

• GUI: Make calculations of risks deterministic to prevent inconsistencies
• GUI: Fix import from relational databases
• Core: Fix import from relational databases
• Various minor bugfixes

ARX 3.4.2

Bugfixes

• Fix JDBC import dialog
• Make sure that all data is trimmed during import
• Fix corruption of files when creating projects with empty hierarchies

ARX 3.4.1

Bugfixes

• GUI: Fix CSV and Excel import

ARX 3.4.0

New features

• Core: Implement sane method for analyzing classification accuracy
• Core: Implement methods for analyzing the distribution of re-identification risks
• Core: Implement new privacy model: estimated k-map
• Core: Implement generalization/suppression factor for AECS quality model
• Core: Implement generalization/suppression factor for Non-Uniform Entropy quality model
• GUI: Implement view for analyzing precision and recall of a statistical classifier
• GUI: Implement method for top/bottom coding
• GUI: Implement views for analyzing the distribution of re-identification risks

Enhancements

• Core: Make suppression string a constant
• Core: Improve implementation of entropy-l-diversity
• GUI: Improve views for analyzing classification accuracy
• GUI: Show whether the currect solution is a global optimum
• GUI: Automatically add transformations of interest to the clipboard
• GUI: Use MySQL connector licensed with Oracle FOSS license
• Tests: Redesign path structure for loading data
• Tests: Add test cases for anonymization with data subsets
• Tests: Add test cases for risk-based anonymization
• Tests: Add test cases for local recoding

Bugfixes

• Core: Do not use suppressed records when estimating risks
• Core: Fix resource leak when loading data
• GUI: Handle differential privacy correctly
• GUI: Fix error when reading/writing projects with empty hierarchies
• GUI: Correctly show tooltips
• GUI: Allow using quasi-identifiers with no hierarchy assigned
• GUI: Fix errors with backwards compatibility
• Tests: Make differential privacy deterministic

ARX 3.3.1

New features

• Implemented derived risk metrics, including measures for prosecutor, journalist and marketer risk.
• Implemented new perspective in the GUI for analyzing these risks.
• Implemented methods for analyzing data mining utility with logistic regression.
• Implemented new perspective in the GUI for analyzing classification accuracy.
• Implemented new privacy model k-map.
• Implemented new privacy model d-disclosure privacy.

Enhancements

• Improved visualization of percentages in the GUI.
• Improved export of data from tables in CSV format.
• Improved utilization of the clipboard in the GUI.
• Updates some labels and messages.
• Improved help with new content.
• Improved detection of HIPAA identifiers. Display confidences.
• Improved editing of population parameters.
• Improved configuration of parameters of privacy models.
• Improved multi-threading in the utility analysis perspective.
• Improved process of solving equation systems for the Pitman model.
• Improved rendering of numbers in the whole GUI.
• Improved performance of hashing. Partial unrolling.
• Various minor improvements.

Bugfixes

• Fixed utility measurement when using differential privacy.
• Fixed file-handling, check if files exist.
• Fixed a bug with backwards compatibility.
• Fixed calculation of geometric mean in summary statistics.
• Fixed calculation of geometric mean in micro-aggregation.
• Various minor fixes.

ARX 3.3.0

• Added method for local recoding with k-anonymity, l-diversity and t-closeness
• Added example project file with high-dimensional data
• Added methods for detecting HIPAA identifiers
• Added implementation of (e,d)-differential privacy
• Added utility measures KL divergence and Ambiguity
• Improved performance of maintaining the solution space
• Implemented critical bugfix to ensure correct classification of the solution space
• Added various minor bugfixes and improvements

ARX 3.2.1

• Fix risk-based anonymization and analysis
• Fix normalized entropy measure

ARX 3.2.0

• Added support for anonymizing high-dimensional datasets
• Changed GUI to support high-dimensional datasets
• Added new utility measures: normalized non-uniform entropy and ambiguity
• Implemented implicit representation of the solution space: ~10% performance improvement and significant reduction of memory requirements
• Fixed multiple resource leaks
• Fixed ~10% performance regression introduced in version 3.1.0
• Various other small improvements and bug fixes

ARX 3.1.0

• Implement microaggregation as a new coding model
• Add support for Oracle DB
• Fix bug in statistics when used with subsets
• Fix some resource leaks
• Various other small improvements and bug fixes

ARX 3.0.0

ARX 2.3.2

• Bugfix: handle zeros correctly in computing the geometric mean for relative comparisons
• Change license to Apache License, Version 2.0

ARX 2.3.1

• Various bugfixes
• Performance improvements

ARX 2.3

Critical bugfixes

• Correctly enforce d-min in (d-min, d-max)-presence
• Remove option “protect sensitive associations” due to faulty implementation

Enhancements (ARX Engine)

• Implement novel pruning strategy
• Introduce localization for data types
• Improved subsystem for measuring data utility
• Implement new default metric (Loss)
• Implement support for attribute weights
• Implement configurable coding model for Loss metric
• Implement configurable aggregate function for most metrics

Enhancements (GUI)

• Provide tooltips and clipboard support for all tables
• Improvided data visualization
• Remove legacy Swing components
• Support attribute weights and parametrizable coding model
• Visualize data and hierarchies with virtual tables
• Updated NatTable to version 1.1.0
• Fix fonts in tables on OSX

ARX 2.2

• Update data visualization components
• Performance improvement for non-monotonic criteria
• Bugfixes

ARX 2.1

• Improved data import
• Support for continuous variables
• Functional representations of generalization hierarchies
• Support creating multiple transformations simultaneously
• Improved support of data types
• Improved data visualizations
• Expose all features via API and GUI
• Various bugfixes

ARX 2.0

• Implement d-Presence
• Support for research subsets
• Support for multiple sensitive attributes
• Improved algorithms for non-monotonic privacy criteria
• More flexible API
• Improved GUI
• Various bugfixes

ARX 1.0

• Implement basic k-anonymity
• Implement distinct-, entropy- and recursive-(c,l)-diversity
• Support t-closeness with and without hierarchies
• Initial version of the GUI