code: private static void initTrackKey() {
  		if (!isEmpty(SDKConfig.getConfig().getEncryptTrackKeyModulus())
  				&& !isEmpty(SDKConfig.getConfig().getEncryptTrackKeyExponent())) {
  			encryptTrackKey = getPublicKey(SDKConfig.getConfig().getEncryptTrackKeyModulus(), 
  					SDKConfig.getConfig().getEncryptTrackKeyExponent());
  			LogUtil.writeLog("LoadEncryptTrackKey Successful");
  		} else {
  			LogUtil.writeLog("WARN: acpsdk.encryptTrackKey.modulus or acpsdk.encryptTrackKey.exponent is empty");
  		}
  	}
docs: 用配置文件acp_sdk.properties配置路径 加载磁道公钥