1 Introduction  
2 System and Threat Overview  
2.1 Pre-trained Language Models  
2.2 PTLM Pipeline  
2.3 Attack Goals  
2.4 Model Transfer Ability  
3 Integrity Threats  
3.1 Backdoor Attacks  
3.2 Evasion Attacks  
4 Privacy Threats  
4.1 Data Privacy Attacks  
4.2 Model Privacy Attacks  
5 Discussion and Conclusion