Google Duo – simple video calling 13.3 (iOS / App Store)

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This application is available for iOS. This app is designed to be simplest video call only application. The latest build was released on Jul 07, 2017. Our latest check was performed on Mar 26th, 2017.

Findings Summary

Our examination revealed total 19 items, where were 9 DAR items and 10 DIT items found. Among DAR items were found 0 worst items, 6 bad items, 1 good item, and 1 best item. Among DIT items were found 0 worst items, 4 bad items, 6 good items, and 0 best items.

Below you find 3 infographics summarizing what we described above. Each image provides information about both DAR and DIT items.

 

 

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Everything presented below is related to well-known CWEs, such as Sensitive data leakage [CWE-200], Unsafe sensitive data storage [CWE-312], Unsafe sensitive data transmission [CWE-319]. You can read more about it here.

Now let’s go deeper and examine each data item’s protection level.

 

Application Description

Let’s cite the description of this application below:

Duo is a one-to-one video calling app for everyone – designed to be simple, reliable and fun so you never miss a moment.
Features:

  • Simple interface
    Call any of your contacts with just one tap, with a simple interface that brings video to the forefront.
  • High quality video
    Experience faster and more reliable video calls, whether you’re on Wi-Fi or on the go.
  • Cross-platform
    Video call all your friends on smartphones with just one simple app.
  • Audio Calls
    Make audio-only calls to your friends when you can’t have a video call.

*Data charges may apply. Check your carrier for details.

Protection levels.

Locally stored data (Data-at-Rest, DAR).

Locally stored data groups include Call Information, Application Information, Account Information, Credentials Information, Log Information, Address Book ‘n’ Contact Information, Media Information.
The average DAR value is 4.17 points (7.00 points of system protection and 1.33 points of own protection). It is higher than a typical value (3.5 points, where’s 7 points of system protection and 0 points of own protection).

Items’ GROUP #1 with average value 3.50 points (7 points of system protection, 0 points of own protection) means data protection levels have following definitions. Frankly talking, extra data found that shouldn’t be accessed where system protection level means – root/jailbreak is required but not possible without wiping device data, and own protection level means – stored as is.

– Call History (‘Call Information’ Group) – Some info about calls you made like phone number, name, date and time, and type of call (missed, placed, outgoing, etc.). This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files,

– Application Configs (‘Application Information’ Group) – Different configuration files created by your app, perhaps app permissions. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Account Data (‘Account Information’ Group) – Basic info about account like name, a list of sub-account (e.g. financial or other) and some linked data like a phone number. This data item related to mentioned group meant to be any info related to profiles, basic credential IDs like email or username or phone number plus some more info depends on applications,

– Credentials (IDs) (‘Credentials Information’ Group) – Only account IDs like app or 3rd party user IDs including emails, phone number, usernames, etc. (depends on apps). This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Log Data (‘Log Information’ Group) – Logged any data as a solid file or multipart files. This data item related to mentioned group meant to be any information stored in local or network logs,

– Contact Short Profile (‘Address Book ‘n’ Contact Information’ Group) – Name, Email ID, Phone number of contacts. This data item related to mentioned group meant to be info locally stored, cached or transferred over the network and belong to this application if it’s social even,

– Access Permissions (‘Application Information’ Group) – The list of permissions linked to access token used to get access to some features of service. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers

Items’ GROUP #2 with average value 6.50 points (7 points of system protection, 6 points of own protection) means data protection levels have following definitions. Frankly talking, protection and privacy issues are still possible but might involve interaction with an app code where system protection level means – root/jailbreak is required but not possible without wiping device data, and own protection level means – data is not available in backups.

– Screen Snapshots (‘Media Information’ Group) – Screenshots of your device screen running certain apps; common as an iOS app multitasking feature (app swipes) or browser tab swipes. This data item related to mentioned group meant to be any data like photo, image, video, audio

Also, keep in mind, using jailbroken device means the system protection level is 0 points and you’re using out-of-date iOS < 8.3 the system protection level is 2 points. If some data marked as shareable via iTunes, then the system protection level is 4 points.

Transferred data (Data-in-Transit, DIT).

Transferred data groups include Device Information, Credentials Information, Address Book ‘n’ Contact Information, Message Information, Media Information, Location ‘n’ Maps Information.
The average DIT value is 5.40 points (5.00 points of system protection and 5.80 points of own protection). It is higher than a typical value (4 points, where’s 4 points of system protection and 4 points of own protection).

Items’ GROUP #1 with average value 4.50 points (5 points of system protection, 4 points of own protection) means data protection levels have following definitions. Frankly talking, data available if it’s allowed only and may require user action where system protection level means – some techniques are available to developers to keep connection bypassing system settings, like proxy settings, etc., and own protection level means – bypassed by fake/stolen root certificates.

– Device Data (‘Device Information’ Group) – Device ID, Device Name, Device OS Name and Version, and jailbroken/root status. This data item related to mentioned group meant to be details about your device,

– Locale ‘n’ TimeZone (‘Device Information’ Group) – Details about your locale, languages, time zone, country and so on. This data item related to mentioned group meant to be details about your device,

– Media Data (‘Location ‘n’ Maps Information’ Group) – Any info like images, audios, videos, media notes, etc. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– Maps Data (‘Location ‘n’ Maps Information’ Group) – Map data loaded by internal (native) or third party map applications like Apple/Google Maps or another one. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.

Items’ GROUP #2 with average value 6.00 points (5 points of system protection, 7 points of own protection) means data protection levels have following definitions. Frankly talking, protection and privacy issues are still possible but might involve interaction with an app code where system protection level means – some techniques are available to developers to keep connection bypassing system settings, like proxy settings, etc., and own protection level means – tricks to bypass sniffing (hardly to be or can’t be patched to bypass), including non-common or unsupported protocols.

– Credentials (Activation IDs) (‘Credentials Information’ Group) – Two-factor activation code received in messages. This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Credentials (IDs) (‘Credentials Information’ Group) – Only account IDs like app or 3rd party user IDs including emails, phone number, usernames, etc. (depends on apps). This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Credentials (Tokens) (‘Credentials Information’ Group) – Different tokens used to get access to your account, except for passwords but including app or 3rd party tokens, secret keys, etc. (usually give full access to your account). This data item related to mentioned group meant to be any types of credentials including basic (IDs only), passwords, tokens, etc.,

– Contact Short Profile (‘Address Book ‘n’ Contact Information’ Group) – Name, Email ID, Phone number of contacts. This data item related to mentioned group meant to be info locally stored, cached or transferred over the network and belong to this application if it’s social even,

– Messages (‘Message Information’ Group) – Different types of messages, conversations, except for SMS, MMS but including recipient and sender IDs and attachments. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Call Stream (‘Media Information’ Group) – Audio or Video call streaming between two or more users. This data item related to mentioned group meant to be any data like photo, image, video, audio

Keep in mind if you’re using out-of-date iOS < 9.0, the system level equals 2 points instead of 4. It means your data can be stolen without involving your actions.

Privacy Policy

Full application privacy policy is available here.

You may find privacy policy details proceeding the link above to compare developer’s vision on data protection with our results.