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You are here: Home / News / Serangan EarSpy Menguping Melaui Sensor Gerak Android

Serangan EarSpy Menguping Melaui Sensor Gerak Android

December 28, 2022 by Coffee Bean

Sebuah tim peneliti telah mengembangkan serangan penyadapan untuk perangkat Android yang dapat, dalam berbagai tingkatan, mengenali jenis kelamin dan identitas penelepon, dan bahkan membedakan percakapan pribadi.

Dinamakan EarSpy, serangan saluran samping bertujuan untuk mengeksplorasi kemungkinan baru penyadapan melalui penangkapan pembacaan data sensor gerak yang disebabkan oleh gema dari speaker telinga di perangkat seluler.

Sementara jenis serangan ini telah dieksplorasi di pengeras suara smartphone, speaker telinga dianggap terlalu lemah untuk menghasilkan getaran yang cukup untuk risiko penyadapan untuk mengubah serangan saluran samping menjadi serangan yang praktis.

Bukti kemajuan ini ditunjukkan di bawah, di mana earphone OnePlus 3T 2016 hampir tidak terdaftar di spektogram sementara speaker telinga stereo OnePlus 7T 2019 menghasilkan lebih banyak data secara signifikan.

ear speaker kiri ke kanan untuk Oneplus 3T, Oneplus 7T, Oneplus 7T loudspeaker (sumber : arxiv.org.org)

Percobaan dan hasil
Para peneliti menggunakan perangkat OnePlus 7T dan OnePlus 9 dalam percobaan mereka, bersama dengan berbagai rangkaian audio pra-rekaman yang diputar hanya melalui pengeras suara kedua perangkat.

Tim juga menggunakan aplikasi pihak ketiga ‘Physics Toolbox Sensor Suite’ untuk menangkap data akselerometer selama panggilan simulasi dan kemudian memasukkannya ke MATLAB untuk dianalisis dan mengekstrak fitur dari aliran audio.

Algoritme pembelajaran mesin (ML) dilatih menggunakan kumpulan data yang tersedia untuk mengenali konten ucapan, identitas penelepon, dan jenis kelamin.

Hasil pengujian pada OnePlus 7T (arxiv.org)

Keterbatasan dan solusi
Satu hal yang dapat mengurangi kemanjuran serangan EarSpy adalah volume yang dipilih pengguna untuk speaker telinga mereka. Volume yang lebih rendah dapat mencegah penyadapan melalui serangan saluran samping ini dan juga lebih nyaman untuk telinga.

Android 13 telah memperkenalkan batasan dalam mengumpulkan data sensor tanpa izin untuk pengambilan sampel kecepatan data di atas 200 Hz.

Para peneliti menyarankan agar produsen ponsel memastikan tekanan suara tetap stabil selama panggilan dan menempatkan sensor gerak pada posisi di mana getaran yang berasal dari dalam tidak memengaruhinya atau setidaknya memiliki dampak seminimal mungkin.

sumber : bleeping computer

Tagged With: Android, Data Breach, OnePlus

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