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. University Information Technology Services (UITS) recommends setting up at least two devices, to allow for situations when your primary device may not be an option.

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

Device Push Voice SMS One-time code Touch Pros Cons Notes
(with Duo Mobile app)
Yes Yes Yes Yes No  • Most versatile option
• Works without cell/wifi connection, or when calls/texts may incur charges
• Duo app is free
• Easy to use
• More likely to be with you
• Recover accounts from backup
• Some people don't own a smart phone
• Some people don't want to use a personal phone
• Recommended primary device
mobile phone

(or smartphone
without the app)
No  Yes Yes No  No  • More likely to be with you • Cellular signal required
• Depending on your carrier and mobile plan, incoming calls or texts may incur charges in some circumstances
• US or Canada phone number required
• Good primary device
(when you don't have a smartphone)
(with Duo Mobile app)
Yes No  No  Yes No  • Works without cell/wifi connection
• Duo app is free
• Easy to use
• Recover accounts from backup
• 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
(For IU office phones, see below)
No  Yes No  No  No  • Works without cell/wifi connection • Must be at location of landline
• US or Canada phone number required
• 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
Due to security concerns, the University Information Security Office (UISO) recommends that you do not use your office phone unless you have a traditional (analog) desk phone. For more, see Office phones and Two-Step Login (Duo).

This is document anfl in the Knowledge Base.
Last modified on 2018-01-26 10:13:22.

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