X hits on this document

165 views

0 shares

0 downloads

0 comments

16 / 66

Receiving messages

  • Many phones drop or alter messages

    • By the time a user sees the message through the phones UI, the phone has already potentially modified

    • In the case of special messages (ex: concatenated), the user wont see the message until all parts arrive

    • This hides too much data from a tester, need to see the raw message that arrives from the carrier

  • To obtain access to raw incoming PDU, it is best to use modems or older phones with extremely limited functionality

    • New phones store messages in phone memory

    • Old phones will write raw PDU directly to SIM

  • SIM can then be removed from phone and analyzed

  • We’ve modified a tool, pySimReader, to allow easy viewing of raw PDUs

RingZero

https://luis.ringzero.net

Document info
Document views165
Page views165
Page last viewedWed Dec 07 20:45:21 UTC 2016
Pages66
Paragraphs677
Words1985

Comments