javascript - what symmetric keys we can use in angular cryptography? -


i using ionic develop mobile application. achieve encryption, using angular mdo cryptography.

https://github.com/middleout/angular-cryptography/blob/master/mdo-angular-cryptography.js

application has remember me feature save server token in localstorage , check same while launching app.

encryption done encrypt sensitive details stored in localstorage. stuck in knowing key can used in above angular cryptography library. tried device uuid seems gets changed while app. upgrade or while ad-hoc testing builds.

any ideas of can use key remains same irrespective of install or delete or upgrade ? application targeted android,ios , windows

help appreciated !


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