register(BackingEngineFactory.class, new PublickeyBackingEngineFactory());
Hashtable<String, Object> props = new Hashtable<>();
props.put(Constants.SERVICE_RANKING, -1);
props.put("name", "basic");
register(EncryptionService.class, new BasicEncryptionService(), props);
Map<String, Object> config = getConfig();
karafRealm = new KarafRealm(bundleContext, config);