Encrypted Files in Jetpack Security

EncryptFiles.kt

// Although you can define your own key generation parameter specification, it's
// recommended that you use the value specified here.
val keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC
val mainKeyAlias = MasterKeys.getOrCreate(keyGenParameterSpec)

val encrypFile = EncryptedFile.Builder(
    File(directoryPath, "file_name"),
    context,
    mainKeyAlias,
    EncryptedFile.FileEncryptionScheme.AES256_GCM_HKDF_4KB
).build()

/*
* For write use openFileOutput 
* For Read use openFileInput
*/

//Write in file
encrypFile.openFileOutput().bufferedWriter().use { writer->
    writer.write("your data")
}

//Read from file
val dataFile = encrypFile.openFileInput().bufferedReader().useLines { reader ->
     // Read data
}