Banyak pakar yang kemudian mencurigai China menggunakan 'server yang tidak terlihat' untuk membajak dan memodifikasi percakapan online warga negaranya.
Dengan teknologi itu China bisa memblok sambil tetapi memberi kesan seolah-olah yang rusak adalah layanan Gmail itu sendiri.
Banyak perusahaan biasanya menggunakan proxy transparan untuk menyaring akses karyawannya pada web-web tertentu. Beberapa penyelenggara jasa internet bahkan menggunakan tehnik itu untuk memasukan iklan atau laman mereka dalam layanan internet.
Tetapi tehnik itu juga semakin sering digunakan aparat pemerintah untuk menyensor dan melacak para aktivis dan demonstran anti pemerintah.
Cara kerjanya, semua lalu lintas Internet dari jaringan tertentu dipaksa melewati proxy itu sehingga bisa dipantau dan dimodifikasi. Tehnik seperti itu sering disebut sebagai tehnik serangan 'man in the middle'.
"Apa yang perlu Anda kerjakan hanya menulis kembali isi pesan email dan mengirimkannya kembali kepada pengguna," kata Nicholas J Perococo, dari lembaga keamanan SpiderLabs, seperti dikutip Technology Review.
Menurutnya para penyedia jasa internet di China bisa melacak semua pengguna Gmail. Untuk melakukan hal itu mereka hanya perlu "mengijeksikan sebuah keystroke logger JavaScript' yang akan mencatat semua informasi yang mereka tulis dalam layanan itu," papar Percoco.
Sayangnya pertahanan melawan serangan seperti di China sangat sulit, terutama jika para penyedia jasa internet mempunyai sertifikat cryptografis yang asli. Sertifikat itu memang seharusnya dimiliki oleh semua penyedia jasa internet utama.
Menggunakan protokol yang dikenal dengan nama HTTPS juga bisa mencegah serangan 'man in the middle' karena dengan itu file yang dikirim dienkripsi ketika sedang transit.
Sayangnya Microsoft mengaku telah mengidentifikasi adanya sembilan sertifikat palsu dari beberapa layanan email terkemukan seperti Yahoo, Google, dan Microsoft. Sertifikat palsu itu bisa digunakan untuk mencegat komunikasi yang bahkan telah terenkripsi.
China sendiri dikabarkan semakin memperketat sensor atas komunikasi Internet untuk mencegah aksi demonstrasi pro-demokrasi di Timur Tengah menjalar ke wilayahnya.
Sementara Google menemukan permasalahan dalam layanan email-nya di China, tempat layanan mereka sering tiba-tiba 'macet' ketika pengguna sedang berkirim surat elektronik, khususnya ketika mengklik tombol 'kirim/send'.
8 Comments:
Hands down, Apple's app store wins by a mile. It's a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I'm not sure I'd want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
The Zune concentrates on being a Portable Media Player. Not a web browser. Not a game machine. Maybe in the future it'll do even better in those areas, but for now it's a fantastic way to organize and listen to your music and videos, and is without peer in that regard. The iPod's strengths are its web browsing and apps. If those sound more compelling, perhaps it is your best choice.
Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It's very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.
Apple now has Rhapsody as an app, which is a great start, but it is currently hampered by the inability to store locally on your iPod, and has a dismal 64kbps bit rate. If this changes, then it will somewhat negate this advantage for the Zune, but the 10 songs per month will still be a big plus in Zune Pass' favor.
The new Zune browser is surprisingly good, but not as good as the iPod's. It works well, but isn't as fast as Safari, and has a clunkier interface. If you occasionally plan on using the web browser that's not an issue, but if you're planning to browse the web alot from your PMP then the iPod's larger screen and better browser may be important.
Hands down, Apple's app store wins by a mile. It's a huge selection of all sorts of apps vs a rather sad selection of a handful for Zune. Microsoft has plans, especially in the realm of games, but I'm not sure I'd want to bet on the future if this aspect is important to you. The iPod is a much better choice in that case.
Zune and iPod: Most people compare the Zune to the Touch, but after seeing how slim and surprisingly small and light it is, I consider it to be a rather unique hybrid that combines qualities of both the Touch and the Nano. It's very colorful and lovely OLED screen is slightly smaller than the touch screen, but the player itself feels quite a bit smaller and lighter. It weighs about 2/3 as much, and is noticeably smaller in width and height, while being just a hair thicker.
The Zune concentrates on being a Portable Media Player. Not a web browser. Not a game machine. Maybe in the future it'll do even better in those areas, but for now it's a fantastic way to organize and listen to your music and videos, and is without peer in that regard. The iPod's strengths are its web browsing and apps. If those sound more compelling, perhaps it is your best choice.
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