9 Precautions for Web Surfing Cookies Cookies are a way for websites to store data locally on a user's machine They may contain sensitive personal information, such as credit card numbers Third-party tracking cookies Some companies specialize in tracking users by having numerous popular sites place their cookies in users browsers This tracking information is used for online profiling, which is generally used for targeted advertising Web bugs A web bug is more active than a cookie and has the ability to immediately send information about user behavior to advertising services om Security in Computing, Fifth Edition, by Charles P. Pfleeger, et aL.(ISBN: 9780134085043) Copyright 2015 by Pearson Education, Inc. All rights reservedFrom Security in Computing, Fifth Edition, by Charles P. Pfleeger, et al. (ISBN: 9780134085043). Copyright 2015 by Pearson Education, Inc. All rights reserved. Precautions for Web Surfing • Cookies • Cookies are a way for websites to store data locally on a user’s machine • They may contain sensitive personal information, such as credit card numbers • Third-party tracking cookies • Some companies specialize in tracking users by having numerous popular sites place their cookies in users’ browsers • This tracking information is used for online profiling, which is generally used for targeted advertising • Web bugs • A web bug is more active than a cookie and has the ability to immediately send information about user behavior to advertising services 9