Understanding IMSI Privacy
summary
An Android research app turns a rooted Galaxy S3/S2 into a passive GSM/3G monitor that logs system information type 3 messages every minute, shows A5/A51/A53 indicator status, detects and surfaces silent SMS with sender numbers, tracks IMSI/TMSI changes and paging requests, and flags downgrades or unencrypted calls. It works only on Intel baseband devices today, needs root, captures radio events into a local database, produced real European logs and screenshots, and the authors plan to publish source and uploadable anonymized data.
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chapters (17)
- 0:00Intro
- 0:32Overview
- 2:11Mobile Security Status
- 4:57Targeted Attacks IMS catcher or compromising phone
- 7:36Unsolved Security Questions
- 9:45More ecosystem problems 3GPP standard for mobile handset features
- 13:49Darshak* Framework
- 16:19Technical Details
- 19:05Methodology
- 20:09GSM Security Issues
- 22:00GSM badly broken
- 29:44Detecting silent SMS - Demo
- 34:24IMSI Catcher Detection
- 36:30Finding parameters
- 40:37Building a profile
- 41:30IMSI catcher??
- 45:46Future work
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