how we can save a file as temporary basis

Question

how we can save a file as temporary basis

i have a xml file it is in encrypted mode i want to decrypt it .but i want it doesn't save on disk rather it save on flash memory. after decryption i have to read values and then it should destroy(decrypted xml file).

Answer 1

Why not just decrypt it in memory and after use you "destroy" the area of memory it occupied? (Write over with random values).

Answer 2

In general, you can not guarantee that the decrypted file will not be written to disk.

Answer 3

You can use one of the File.createTempFile(...) methods and make sure that it's deleted as soon as it's not needed. You can also set File.deleteOnExit() .

But, as others have posted, there is no guarantee that the file will not be written to disk.