1. Networking Public Wifi and Print Sharing
2017 TCS SMT Training - Dallas

2. 2016 TCS SMT Training - Dallas
The Danger
See articles/videos in next slide
The ease of use of hacking tools is now such that any bored teenager in a public library can use them.
It is easy to steal user IDs and passwords even on secure connections, when connected via Public wifi.
2016 TCS SMT Training - Dallas

3. 2016 TCS SMT Training - Dallas
Articles/Videos
Man in the Middle attack demonstration
r-demonstrates-risks-of-using-public-wi- fi
/heres-what-an-eavesdropper-sees- when-you-use-an-unsecured-wi-fi- hotspot.html
Man in the Middle attack theory
2016 TCS SMT Training - Dallas

4. My network is secure so windows print sharing is ok – NOT GUARANTEED!
Very likely that there will be no issues
Security breaches are very low probability. “Security by Obscurity” works – in general.
If an event occurs the consequences of a breach is high and negative.
Huge workload for local volunteers identifying and notifying affected Taxpayers
If publicized then very negative for program
2017 TCS SMT Training - Dallas

5. Alternatives to Windows print sharing
Use one computer as a print server only
If you only have a USB printer, there are wireless routers that have a USB port in addition to Ethernet ports. This allows the computers to access the printer wirlessly.
2017 TCS SMT Training - Dallas

6. 2017 TCS SMT Training - Dallas
“My Network is Secure”
Multi-layered security
Secure router based network
Up to date on Windows Update
Microsoft Security Essentials (7), Defender (10), or better 3rd party anti-malware.
No File or Print Sharing
No use of computers for anything other than Tax Prep. (No downloaded games or widespread browsing)
Attachment to network of non-Tax Prep, or personal computers for Tax Prep are our biggest single risk. If possible do not do it.
Violation of any of these brings risk
2017 TCS SMT Training - Dallas

7. 2017 TCS SMT Training - Dallas
Windows Print Sharing
Opens up a sharing connection among networked systems
If a single system becomes infected, all systems become infected – this has generally been true over PC history.
WannaCry ransomware used the print sharing Ports as a distribution method. ( (SMB Port 445 and Port 139)
Petya wiper malware also used the sharing ports ( wiper-malware.html)
Using Print Sharing unnecessarily increases our security risks.
All security involves a convenience/simplicity vs enhanced security trade off.
2017 TCS SMT Training - Dallas

8. 2017 TCS SMT Training - Dallas
Questions ???
2017 TCS SMT Training - Dallas