Search engine code is moving target that eludes manual audits
Web services companies, such as Facebook, Google and Microsoft, all make promises about how they will use personal information they gather. But ensuring that millions of lines of code in their systems operate in ways consistent with privacy promises is labor-intensive and difficult. A team from Carnegie Mellon University and Microsoft Research, however, has shown these compliance checks can be automated.
The researchers developed a prototype automated system that is now running on the data analytics pipeline of Bing, Microsoft's search engine. According to Saikat Guha, researcher at Microsoft, it's the first time automated privacy compliance analysis has been applied to the production code of an Internet-scale system and is a reflection of Microsoft's commitment to creating the technology necessary to further safeguard the privacy of customers.
Employing a new, lawyer-friendly language to specify privacy policies and using a data inventory to annotate existing programs, the researchers showed that a team of just five people could manage a daily compliance check on millions of lines of code written by several thousand developers.
They presented their research findings at the 35th IEEE Symposium on Security & Privacy, May 18-21, in San Jose, Calif.
"Companies in the United States have a legal obligation to declare how they use personal information they gather and it's also good business to establish a bond of trust with customers," said Anupam Datta, associate professor of computer science and electrical and computer engineering. "But these systems are constantly evolving and their scale can be daunting. The manual methods typically used for checking compliance are labor intensive, yet too often fail to catch all violations of policy."
"Tens of millions of lines of code are already in the pipeline," noted Shayak Sen, a Ph.D. student in computer science who interned at Microsoft Research India and the lead student author on the study. "And during our implementation on Bing, we found that more than 20 percent of the code was changing on a daily basis." At these large scales, automated methods offer the best hope of verifying compliance.
"One reason that gaps exist between policies set by a company's privacy team and the code written by software developers is that the two groups don't speak the same language," Datta said. Lawyers and privacy champions typically have little experience in programming and developers attempting to translate policies into code can get tripped up by ambiguities in the language of the privacy policies.
So the researchers developed a language – Legalease – that could be easily learned and used by privacy advocates. It employs allow-deny rules with exceptions, a structure that is found in many privacy policies and laws, such as the Health Insurance Portability and Accountability Act (HIPAA), and is expressive enough to capture the real policies of an industrial-scale system such as Bing.
In preliminary usability testing, a dozen Microsoft employees were given a one-page document explaining Legalease and spent an average of under 5 minutes studying it. They then took an average of less than 15 minutes to encode nine Bing policy clauses regarding how user information can be used. "They were able to perform this task with a high degree of accuracy, which is encouraging," Sen said.
But encoding privacy policies correctly means little if it cannot be applied to large codebases written by large teams of programmers. To solve this dilemma, the researchers leveraged Grok – a data inventory that annotates existing programs written in languages typically employed by MapReduce-like systems, such as those used by Bing and Google – for their backend data analytics over user data.
Grok performs this automated annotation by combining information from different sources with varying levels of confidence. For instance, automated pattern-matching to column names can be performed across an entire database, but with low confidence, while annotations by developers have high confidence, but low coverage.
Grok had been developed by Microsoft Research and deployed by Bing for the express purpose of automating privacy compliance checking the previous year, but writing policies for Grok was cumbersome.
"Legalease was the final piece of the automated privacy compliance jigsaw puzzle," Guha said. "Developed over Sen's internship and subsequent collaboration with CMU, Legalease bridged privacy teams with Grok, and through Grok, with the developers."
Datta said automating the process of compliance checks could push the industry to adopt stronger privacy protection policies.
The research team included Sriram K. Rajamani of Microsoft Research in Bangalore, India; Janice Tsai of Microsoft Research, Redmond, and Jeannette Wing, corporate vice president of Microsoft Research and former head of CMU's Computer Science Department.
This research was supported, in part, by the Air Force Office of Scientific Research and the National Science Foundation.
About Carnegie Mellon University:
Carnegie Mellon is a private, internationally ranked research university with programs in areas ranging from science, technology and business, to public policy, the humanities and the arts. More than 12,000 students in the university's seven schools and colleges benefit from a small student-to-faculty ratio and an education characterized by its focus on creating and implementing solutions for real problems, interdisciplinary collaboration and innovation. A global university, Carnegie Mellon has campuses in Pittsburgh, Pa., California's Silicon Valley and Qatar, and programs in Africa, Asia, Australia, Europe and Mexico.
Byron Spice | Eurek Alert!
Computing at the Speed of Light
22.05.2015 | University of Utah
NOAA's GOES-R satellite begins environmental testing
22.05.2015 | NASA/Goddard Space Flight Center
Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.
Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...
Development and implementation of an advanced automobile parking navigation platform for parking services
To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...
The world's first electrical car and passenger ferry powered by batteries has entered service in Norway. The ferry only uses 150 kWh per route, which...
On Tuesday, 19 May 2015 the research icebreaker Polarstern will leave its home port in Bremerhaven, setting a course for the Arctic. Led by Dr Ilka Peeken from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) a team of 53 researchers from 11 countries will investigate the effects of climate change in the Arctic, from the surface ice floes down to the seafloor.
RV Polarstern will enter the sea-ice zone north of Spitsbergen. Covering two shallow regions on their way to deeper waters, the scientists on board will focus...
Nanoengineers at the University of California, San Diego developed a gel filled with toxin-absorbing nanosponges that could lead to an effective treatment for skin and wound infections caused by MRSA (methicillin-resistant Staphylococcus aureus), an antibiotic-resistant bacteria. This "nanosponge-hydrogel" minimized the growth of skin lesions on mice infected with MRSA - without the use of antibiotics. The researchers recently published their findings online in Advanced Materials.
To make the nanosponge-hydrogel, the team mixed nanosponges, which are nanoparticles that absorb dangerous toxins produced by MRSA, E. coli and other...
20.05.2015 | Event News
18.05.2015 | Event News
12.05.2015 | Event News
22.05.2015 | Materials Sciences
22.05.2015 | Information Technology
22.05.2015 | Materials Sciences