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Bitcoin Wallet (Schildbach)
(Actually "Bitcoin Wallet". For details read below.)

latest release: 8.14 last analysed  1st June 2021 Reproducible when tested  
3.9 ★★★★★
27963 ratings
1st March 2011

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Older reviews (show 17 of 17 reproducible)


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 questionable coding practice. Nasa sends probes to space that crash due to software bugs despite a huge budget and stringent scrutiny.

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.

If you find something we should include, you can create an issue or edit this analysis yourself and create a merge request for your changes.

The Analysis 

For the latest version the test script came to these results:

appId:          de.schildbach.wallet
signer:         58dcd8a0edf2a590683ba022d22a8dca5659aabf4728741a5c07af738d53db38
apkVersionName: 8.14
apkVersionCode: 814
appHash:        e4f9be85ecbac8a418ec4f2d1577f1cea0c265f1b0cd501408c3ec993213ef08

Files /tmp/fromPlay_de.schildbach.wallet_814/apktool.yml and /tmp/fromBuild_de.schildbach.wallet_814/apktool.yml differ
Only in /tmp/fromPlay_de.schildbach.wallet_814/original/META-INF: BITCOIN-.RSA
Only in /tmp/fromPlay_de.schildbach.wallet_814/original/META-INF: BITCOIN-.SF
Files /tmp/fromPlay_de.schildbach.wallet_814/original/META-INF/MANIFEST.MF and /tmp/fromBuild_de.schildbach.wallet_814/original/META-INF/MANIFEST.MF differ

Revision, tag (and its signature):
object be2eeeda88c31e362b80efcecb4804cabf8fff39
type commit
tag v8.14
tagger Andreas Schildbach <andreas@schildbach.de> 1622386825 +0200

8.14 release

That is what we expected to again give this app the verdict reproducible.


Verdict Explained

The binary provided was reproducible from the code provided.

As part of our Methodology, we ask:

Does the app we built differ from what we downloaded? If not, we tag it Reproducible  

If we can reproduce the app we downloaded from the public source code, with all bytes accounted for, we call the app reproducible. This does not mean we audited the code but it’s the precondition to make sure the code has relevance for the app.

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.

“Reproducible” does not mean “verified”. There is good reason to believe that security researchers as of today would not detect very blatant backdoors in the public source code before it gets exploited, much less if the attacker takes moderate efforts to hide it. This is especially true for less popular projects.