Exploiting Proximity-Based Mobile Apps for Large-Scale Location Privacy Probing

Table 4

Defense evaluation of proximity-based apps.

APP	Exploit method	Penalty for abnormal behaviors	Approximate safe probing speed
Mitalk	Encryption cracking & forging requests	Ban the account for several minutes	3 seconds/place
Momo	Forging requests	Ban the account for several minutes	1 second/place Allow around 1000 requests per day for non-VIP users
Wechat	Emulator simulation	Lock the account. Need to re-login and unlock it manually	Slower than 60 seconds/place
Weibo	Forging requests	Ban the account for several minutes	2 seconds/place
Didi	Forging requests	Ban the IP for several hours	0.5 seconds/place