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While visiting iCloud, certain CA certificates can be obtained, excluding both man-in-the-middle and HTTP redirect attacks.
The foreign certificate chain can be detected using online certificate testing sites, including '你有科學我有神功' and '境外手機卡蜂窩數據'. Moreover, DigiCert High Assurance EV Root CASN:02ac5c266a0b409b8f0b79f2ae462577 and Apple Public EV Server RSA CA 2 - G1SN:07177911005d2267f68892f68f8b5058 were identified.
The domestic certificate chain can be detected using local wideband broadband and foreign handsets, as well as websites hosting foreign certificates. However, the website IP may not be within a specific country.
Certain possibilities and issues related to foreign certificate chains being compromised and having embedded mirror programs remain.
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