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I'm looking to use the new licensing (LVL) stuff with Android Marketplace, but I'm running into a performance problem with the stock AESObfuscator. Specifically, the constructor takes several seconds to run on a device (pure agony on emulator). Since this code needs to run to even check for cached license responses, it puts a serious damper on checking the license at startup. Running the LVL sample app, here's my barbarian-style profiling of AESObfuscator's constructor: public AESObfuscator(byte[] salt, String applicationId, String deviceId) { Log.w("AESObfuscator", "constructor starting"); try { Log.w("AESObfuscator", "1"); SecretKeyFactory factory = SecretKeyFactory.getInstance(KEYGEN_ALGORITHM); Log.w("AESObfuscator", "2"); KeySpec keySpec = new PBEKeySpec((applicationId + deviceId).toCharArray(), salt, 1024, 256); Log.w("AESObfuscator", "3"); SecretKey tmp = factory.generateSecret(keySpec); Log.w("AESObfuscator", "4"); SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES"); Log.w("AESObfuscator", "5"); mEncryptor = Cipher.getInstance(CIPHER_ALGORITHM); Log.w("AESObfuscator", "6"); mEncryptor.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(IV)); Log.w("AESObfuscator", "7"); mDecryptor = Cipher.getInstance(CIPHER_ALGORITHM); Log.w("AESObfuscator", "8"); mDecryptor.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(IV)); } catch (GeneralSecurityException e) { // This can't happen on a compatible Android device. throw new RuntimeException("Invalid environment", e); } Log.w("AESObfuscator", "constructor done"); } The output on a Nexus One: 09-28 09:29:02.799: INFO/System.out(12377): debugger has settled (1396) 09-28 09

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