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‘Favicons’ Browser Dapat Digunakan sebagai ‘Supercookies’ yang Tidak Dapat Dihapus untuk Melacak Anda Secara Online

February 11, 2021 by Winnie the Pooh

Favicons adalah salah satu hal yang pada dasarnya digunakan setiap situs web tetapi tidak ada yang memikirkannya.

Namun, menurut seorang peneliti, ikon-ikon ini bisa menjadi kerentanan keamanan yang memungkinkan situs web melacak pergerakan Anda dan melewati VPN, status penjelajahan penyamaran, dan metode tradisional lainnya untuk menyembunyikan pergerakan Anda secara online.

Metode pelacakan tersebut disebut Supercookie, dan ini hasil karya perancang perangkat lunak Jerman Jonas Strehle.

“Supercookie menggunakan favicon untuk menetapkan pengenal unik bagi pengunjung situs web. Tidak seperti metode pelacakan tradisional, ID ini dapat disimpan hampir secara terus-menerus dan tidak dapat dengan mudah dihapus oleh pengguna, ”kata Strehle di Github-nya.

Untuk lebih jelasnya, ini adalah proof of the concept dan bukan sesuatu yang ditemukan Strehle di alam liar. Program supercookie Strehle (yang menggunakan favicon Cookie Monster) adalah proof of the concept yang dijelaskan oleh peneliti universitas.

“Favicon harus dibuat sangat mudah diakses oleh browser. Oleh karena itu, mereka di-cache dalam database lokal terpisah pada sistem, yang disebut cache favicon (F-Cache), “kata Strehle.

Entri F-Cache menyertakan banyak data tentang di mana pengguna berada, semuanya dalam layanan untuk mengirimkan ikon kecil cepat ke jendela penelusuran Anda. Data ini memungkinkan server web untuk mengetahui sedikit tentang pengunjungnya.

Selengkapnya: Vice

Tagged With: Browser, Cyber Security, Favicons, Security, Trace, Vulnerability

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