security - Android how to handle sensitive data in memory -


please have following scenario:

the app uses password access remote webservice on https;

to so, app asks user password, not store on device (and use in safe manner access webservice).

my concern following: it's theroetically possible access memory read data contains , retrieve password.

please how prevent happening?

thanks

please how prevent happening?

i wear tin-foil hats on professional basis (besides, think spiffy...), , beyond worry about. i'd worry making https code won't victim of martian-in-the-middle (mitm) attack, that's lot easier attacker execute.

that being said, samgak alludes in comment, string immutable. once password in string, @ risk attack describe.

if use edittext collect password, not call gettext().tostring() user typed in. gettext() return editable, allows @ characters, not string. then, if http client api allows fill in password using char[], once http request done, can clear out contents of char[], clear() editable, , pray edittext , kin aren't holding onto string anywhere represents user typed in. may vary device, device manufacturers have had long history of screwing around edittext behavior, , may clean in terms of aosp code may less clean on hardware manufacturers.

if getting password other means (e.g., own set of pin entry buttons), avoid string representation of result, , wipe out char[] when you're done it.


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