3Qs: Who’s got your digital dossier?

North­eastern mobile sys­tems expert David Choffnes says data bro­kering, in which the data we share online is bought and sold by third par­ties, has blos­somed into a viable industry and is the reason many pop­ular apps are free. But he says the average user knows little about how their per­sonal infor­ma­tion is shared.

New tools to get your smartphone up to speed

Dave Choffnes, an assis­tant pro­fessor in the Col­lege of Com­puter and Infor­ma­tion Sci­ence, is devel­oping pro­grams that incen­tivize smart­phone users to share their data in order to improve the mobile Internet expe­ri­ence while still pro­tecting their privacy.

Take 5: How to protect your passwords

Not using the same pass­word for every­thing is among sev­eral tips North­eastern cyber­se­cu­rity expert Wil Robertson sug­gests to help Internet users guard their per­sonal infor­ma­tion online.

3Qs: When Web reviews aren’t what they seem

Crowd­sourced social media plat­forms such as Face­book and Yelp are increas­ingly being infil­trated by fake accounts and reviews that cloud the legit­i­macy of some online rating sys­tems. Assis­tant pro­fessor Christo Wilson dubbed this phe­nom­enon “crowd­turfing,” and he’s deter­mined to make these sys­tems more secure.

3Qs: Target’s security breach

Asso­ciate pro­fessor and cyber­se­cu­rity expert Engin Kirda dis­cusses the data secu­rity breach at Target last week that affected up to 40 mil­lion cus­tomers and how cyber­at­tacks have evolved in recent years.