This app was first launched on 1st July 2013 and currently has more than 1000000 downloads, a 4.3 stars rating from 7943 users and the latest APK (version 22.214.171.124) was from 20th March 2020.
We found these ways of contacting the developers:
- Review of version 126.96.36.199 on 20th March 2020 (verdict: verifiable)
- Review of version 188.8.131.52 on 17th February 2020 (verdict: verifiable)
- Review of version 184.108.40.206 on 16th February 2020 (verdict: nonverifiable)
- Review of version 220.127.116.11 on 7th January 2020 (verdict: verifiable)
- Review of version 18.104.22.168 on 16th November 2019 (verdict: verifiable)
The following Analysis is not a full code review! We plan to make code reviews available in the future but even then it will never be a stamp of approval but rather a list of incidents and bad coding practice. We cannot find and tell you all the dark secrets the wallet providers might have.
Do your own research!
Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.
Disclaimer: The authors of this project have contributed to Mycelium. Andreas Schildbach was so kind and independently tested and confirmed Mycelium’s verifiability here for a past version. Independent tests would be highly welcome!
Here we test if version
22.214.171.124 also can be verified, following the known
procedure expressed in our
Results for appId: com.mycelium.wallet apkVersionName: "126.96.36.199" apkHash: f35760dbc40959142c98abf923e70681e75cd6644892be15a7c3d3a689e11af8 Diff: Files /tmp/fromPlay_com.mycelium.wallet_3030301/apktool.yml and /tmp/fromBuild_com.mycelium.wallet_3030301/apktool.yml differ Files /tmp/fromPlay_com.mycelium.wallet_3030301/original/META-INF/CERT.RSA and /tmp/fromBuild_com.mycelium.wallet_3030301/original/META-INF/CERT.RSA differ Files /tmp/fromPlay_com.mycelium.wallet_3030301/original/META-INF/CERT.SF and /tmp/fromBuild_com.mycelium.wallet_3030301/original/META-INF/CERT.SF differ Files /tmp/fromPlay_com.mycelium.wallet_3030301/original/META-INF/MANIFEST.MF and /tmp/fromBuild_com.mycelium.wallet_3030301/original/META-INF/MANIFEST.MF differ
This diff is what we want to see to call it verifiable.
Verifiable: The provided Open Source Code matches the app released on Google Play
The app can be independently verified. If the provider puts your funds at risk on purpose or by accident, security researchers can see this if they care to look. It also means that inside the company engineers can verify that the release manager is releasing the app based on code known to all engineers on the team. A scammer would have to work under the potential eyes of security researchers. He would have to take more effort in hiding any exploit.
"Verifiable" does not mean "verified". There is good reason to believe that security researchers as of today would not detect very blatant backdoors in the open source code before it gets exploited, much less if the attacker takes moderate efforts to hide it.