Two-Step Login (Duo) device recommendations

Based on functionality, ease of use, network availability, security considerations, likelihood of being on person, and cost to the university, following is the recommended order of use for Two-Step Login (Duo) device options at Indiana University.

For setup instructions for various devices, see Getting started with Two-Step Login (Duo) at IU.

Device Push Voice SMS One-time code Touch Pros Cons Notes
Smartphone
(with Duo Mobile app)
Yes Yes Yes Yes No  • Most versatile option
• Works without cell/wifi connection
• Duo app is free
• Easy to use
• More likely to be with you
• Some people don't own a smart phone
• Some people don't want to use a personal phone
• Recommended primary device
Non-smart
mobile phone

(or smartphone
without the app)
No  Yes Yes No  No  • More likely to be with you • Cellular signal required • Good primary device
(when you don't have a smartphone)
Tablet
(with Duo Mobile app)
Yes No  No  Yes No  • Works without cell/wifi connection
• Duo app is free
• Easy to use
• Some people don't own a tablet • Good primary device
(when you don't have a phone)
• Excellent secondary device
Single-button hardware token (SBHT) No  No  No  Yes No  • Easy to use • Must be with you
• Can become out of sync
• Non-replaceable battery
• Fair primary device
• Excellent secondary device
U2F Key No  No  No  No  Yes • Easy to use
• Durable
• No battery required
• Must be with you
• Works only in Chrome browser
• USB port required
• Fair primary device
• Excellent secondary device
Landline
(For IU office phones, see below)
No  Yes No  No  No  • Works without cell/wifi connection • Must be at location of landline • Fair secondary device
Google Voice No  Yes Yes No  No  • Google Voice is free
• No separate device needed
• US phone number required for initial setup
• Some countries block Google access

• Fair secondary device
Note:
Due to security concerns, the University Information Security Office (UISO) recommends that you do not use your office phone if you use UniCom (i.e., Skype for Business/Lync phones). For more, see Can I use an office phone with Two-Step Login (Duo)?

This is document anfl in the Knowledge Base.
Last modified on 2017-06-05 12:20:36.

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