Skype – free IM & video calls (Android / Google Play)

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This application is available for Android. This application is designed to keeps the world talking, free messaging, voice and video calls with anyone. The latest build was released on July 5, 2017. Our latest check was performed on Feb 26th, 2017

Findings Summary

Our examination revealed total 28 items, where were 8 DAR items and 20 DIT items found. Among DAR items were found 0 worst items, 8 bad items, 0 good items, and 0 best items. Among DIT items were found 0 worst items, 4 bad items, 16 good items, and 0 best items.

Below you find 2 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:

The Skype you know and love has an all-new design, supercharged with a ton of new features and new ways to stay connected with the people you care about most.
What can I do with Skype?

  • Messaging made awesome: More than just text. Send photos, videos, voice messages, emoticons, Mojis and more. You can also respond to any message from your contacts with reactions.
  • Supercharge your chats with Add-Ins**: No more switching back and forth between apps. Easily share content using Add-Ins without leaving Skype.
  • Great for groups: Add your favorite people and start chatting. Use groups to plan together, play together, for staying in touch or just for hanging out.
  • Call everyone – Skype, mobiles and landlines: Free* video and voice calls make it easier to stay connected with friends and family. You’ll also enjoy low calling rates to mobiles and landlines worldwide with Skype.
  • Never miss a moment with quick capture: Quickly swipe to capture photos and videos. Make them your own by adding emoticons, stickers and annotations.
  • Share Highlights: Keep others updated with Highlights from your day. React to any highlights with awesome emoticons or send a private message about that highlight. Your highlights only stay visible for 7 days to your followers.

*Skype to Skype calls are free. Operator data charges may apply. We recommend using an unlimited data plan or WiFi connection.
** Add-In availability will vary by country.
We’re gradually bringing the next generation of Skype to everyone.
If you don’t see the update yet, don’t worry, it’ll be coming very soon.
Learn more about the new design and features in the Skype Blog: https://blogs.skype.com/news/2017/06/01/introducing-the-next-generation-of-skype
Upgrading to the new Skype may result in the deletion of content from older conversations.
To save photos and videos that were previously sent or received in an older version of Skype, save that content to your camera roll/photo gallery before upgrading to the new Skype.

 

Protection levels.

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

Locally stored data groups include Location ‘n’ Maps Information, Application Information, Credentials Information, Log Information, Message Information.
The average DAR value is 3.50 points (7.00 points of system protection and 0.00 points of own protection). It equals to a typical value (3.5 points, where’s 7 points of system protection and 0 points of own protection).

Items 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.

– Address Data (‘Location ‘n’ Maps Information’ Group) – Home, work or another type of owner address stored by apps. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– 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,

– 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,

– Network Data (‘Log Information’ Group) – Basic info about network used to make a connection, such as a device like IP, connection type. This data item related to mentioned group meant to be any information stored in local or network logs,

– 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,

– Media Data (‘Message Information’ Group) – Any info like images, audios, videos, media notes, etc. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– Address Data (‘Message Information’ Group) – Home, work or another type of owner address stored by apps. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments

Keep in mind if you’re using some Android devices such Samsung, LG or another device with an unlocked or non-locked loader that allow rooting your device without user action, the system level equals 6 points instead of 7. It means your data can be stolen without involving your actions.

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

Transferred data groups include Message Information, Payment ‘n’ Transaction Information, Credentials Information, Location ‘n’ Maps Information, Call Information, Account Information, Address Book ‘n’ Contact Information, Application Information.
The average DIT value is 5.30 points (5.60 points of system protection and 5.00 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 5.00 points (6 points of system protection, 4 points of own protection) means data protection levels have following definitions. Frankly talking, data is not available all the time or partially accessed where system protection level means – MITM prevented or fake certificate importing prevented, but plaintext non-protected traffic is intercepted, and own protection level means – bypassed by fake/stolen root certificates.

– Media Data (‘Message Information’ Group) – Any info like images, audios, videos, media notes, etc. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– URLs (‘Message Information’ Group) – Different types of URLs referred to your files stored in clouds, profiles, social accounts, media files available online, etc. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– URL Preview (‘Message Information’ Group) – A preview of URL (usually not related to the Stream but typically related to the messages. This data item related to mentioned group meant to be all message, including SMS, MMS, social and IM messages with or without attachments,

– 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 (Passwords) (‘Credentials Information’ Group) – Well-known passwords or PINs you’re using to get access to your account (usually it is worse than tokens because it gives 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.,

– 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.,

– Address Data (‘Location ‘n’ Maps Information’ Group) – Home, work or another type of owner address stored by apps. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– Device Data (‘Location ‘n’ Maps 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 any geodata from trackers, social networks, GPS, etc.,

– Card Short Number (‘Payment ‘n’ Transaction Information’ Group) – Several digits of your card from 4 to 6 first digits and from 6 to 4 last digits. This data item related to mentioned group meant to be details about transactions and payment data involved into transaction records

Items’ GROUP #2 with average value 6.00 points (6 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 – MITM prevented or fake certificate importing prevented, but plaintext non-protected traffic is intercepted, and own protection level means – SSL pinning (can be patched).

– Card Full Information (‘Payment ‘n’ Transaction Information’ Group) – All details about card include short info, holder address, bank info and CVC, CVV, CVV2. This data item related to mentioned group meant to be details about transactions and payment data involved into transaction records

Items’ GROUP #3 with average value 6.50 points (6 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 – MITM prevented or fake certificate importing prevented, but plaintext non-protected traffic is intercepted, 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.

– GEO Data (‘Location ‘n’ Maps Information’ Group) – Any GEO info stored as plain text referred to the places or tracked activity. This data item related to mentioned group meant to be any geodata from trackers, social networks, GPS, etc.,

– Call Stream (‘Call Information’ Group) – Audio or Video call streaming between two or more users. This data item related to mentioned group meant to be any call info stored, cached or transferred in plain text or media files,

– 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,

– 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,

– Contact Profile (‘Address Book ‘n’ Contact Information’ Group) – Full info about contacts including name email id, phone numbers, gender, linked accounts, geodata, stream and social activity. 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,

– Tracked Data ‘n’ Favorites (‘Address Book ‘n’ Contact Information’ Group) – Any favorites data or tracked data marked as desirable by users and for users (Means, user is on FB messenger, Viber, bank client or favourite hotel, room type, flight route, airline). 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

Items’ GROUP #4 with average value 4.00 points (4 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 – informs if fake certificate imported into a device, and own protection level means – bypassed by fake/stolen root certificates.

– Credentials (IDs) (‘Application 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 info related to the app, app settings, including installed apps or installers,

– Credentials (Passwords) (‘Application Information’ Group) – Well-known passwords or PINs you’re using to get access to your account (usually it is worse than tokens because it gives full access to your account). This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Account Details (‘Application Information’ Group) – Full info about your account including account membership, expiration, profile, linked data and account, etc. This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers,

– Birthday Details (‘Application Information’ Group) – Separately stored info about date or place of birthday (usually part of profile or grabbed from social networks). This data item related to mentioned group meant to be any info related to the app, app settings, including installed apps or installers.

Keep in mind if you’re using out-of-date Android < 7.0, the system level equals 4 points instead of 6. It means your data can be stolen with a crafted preinstalled certificate on the device or if someone makes you install a certificate. Also, if you’re using out-of-date Android < 5.0, 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.
More than 500 million users in total use this application.