https://github.com/josegonzalez/upload/tree/2.0
However I found out you cant randomize the file name. (There is an option to randomize the folder it store the file in). After a bit of hack and slash i managed to append a random string 'time()' to file name.
/app/Plugin/Upload/Model/Behavior/UploadBehavior.php
This will append the UNIX time stamp to the file you're uploading as well the file name stored in the table and all the thumbnails.
/app/Plugin/Upload/Model/Behavior/UploadBehavior.php
//Line 78 private $rand_str; //Line 87(inside the setup function) $this->rand_str = time();
//End of the beforeSave function $model->data[$model->alias][$field] = $this->rand_str."_". $model->data[$model->alias][$field];
This will append the UNIX time stamp to the file you're uploading as well the file name stored in the table and all the thumbnails.