In com.duosecurity.client.Http, there's a static instance of SimpleDateFormat, RFC_2822_DATE_FORMAT, that is used in method signRequest. SimpleDateFormat is not thread safe, and therefore this usage can cause serious issues when used in a multi-threaded app (like a j2ee web app). For example, see http://www.codefutures.com/weblog/andygrove/2007/10/simpledateformat-and-thread-safety.html
In com.duosecurity.client.Http, there's a static instance of SimpleDateFormat, RFC_2822_DATE_FORMAT, that is used in method signRequest. SimpleDateFormat is not thread safe, and therefore this usage can cause serious issues when used in a multi-threaded app (like a j2ee web app). For example, see http://www.codefutures.com/weblog/andygrove/2007/10/simpledateformat-and-thread-safety.html