I am considering to book a flight from BAH to HKG to SFO. The layover in HKG is just 50 minutes.
Is that enough?
Is there any security scan to go through?
Any tips/tricks?
Will the gates be closer?

These are the dates and details:
Depart Thu, Apr 12 BAH to SFO – 1 stop 21h 20m
Cathay Pacific – Flight 742 8h 00m
Take-off Thu 12:15a BAH Bahrain, Bahrain
Landing Thu 1:15p HKG Hong Kong, Hong Kong
Economy BusinessEconomy | Airbus A330 (Wide-body Jet) | 8h 00m | 3953 miles | Fare code: YOW | 4 seats remain | Fare code: JOW | 4 seats remain
Connection HKG Hong Kong, Hong Kong 0h 50m
Cathay Pacific – Flight 870 12h 30m
Take-off Thu 2:05p HKG Hong Kong, Hong Kong
Landing Thu 11:35a SFO San Francisco, CA
Economy BusinessEconomy | Boeing 747-400 (Wide-body Jet) | 12h 30m | 6911 miles | Fare code: BLXAPO | 4 seats remain