ObjectInputStream ois = new ObjectInputStreamEx(new GZIPInputStream(
new CipherInputStream(new ByteArrayInputStream(Base64.decode(base64.toCharArray())),sym)),
Jenkins.getInstance().pluginManager.uberClassLoader);
try {
long timestamp = ois.readLong();
if (TimeUnit2.HOURS.toMillis(1) > abs(System.currentTimeMillis()-timestamp))
// don't deserialize something too old to prevent a replay attack
return (ConsoleAnnotator)ois.readObject();
} finally {
ois.close();