[android-developers] Re: AES decryption is slow....

interestingly enough, on a device T-Mobile G2, things are fast - like
on the order that I would expect - 10 to 15 seconds. so i guess this
is less important, however, it's still troubling that it's so slow on
the simulator.

On Dec 29, 9:14 am, sdphil <phil.pellouch...@gmail.com> wrote:
> hi,
>
> I am trying to do AES decryption like this --
>
> Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
> cipher.init(Cipher.DECRYPT_MODE, aesKey);
> cipher.update(encryBytes, 0, encrByteCount);
>
> And it is taking me about 2.5+ seconds to run just the cipher.update
> (i.e. I excluded the init and getInstance() calls) for 65KB of data --
> which seems way too long.
>
> What this translates to (roughly) 60 seconds for a 1.5MB file.  Which
> is uber slow.
>
> I *am* actually seeing 60 or so seconds when I try to decrypt that big
> of a file (looping through and feeding buffers).
>
> Does anybody know why AES decryption is so slow on Android?  A co-
> worker is seeing times around 10 seconds for the same file on a RIM
> device.
>
> tia.

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