QRSA OTP Authentication
v1.4 · 35.5 KB · code 5
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File information
UpdatedJan 13, 2018
PublishedJan 13, 2018
Packageeu.sebbe.www.qrsa
Versionv1.4 (5)
Size35.5 KB
MD599ef26d3f484b26e116314afabc339dc
Min SDK23
Malware scanTRUSTED
Signature SHA17D:76:8B:BD:F9:FA:0E:30:E5:A7:B6:EC:8C:F9:91:B3:B6:64:84:80
SignerCN=Sebastian Nielsen, L=Goteborg, ST=Vastra Gotaland, C=SE
Total downloads100
This version100
DeveloperSebastian Nielsen (sebbe.eu)
Age ratingEveryone
What's new in v1.4
1.4:
- Added Md5 hash verification, to further protect against malleability attacks.
1.3:
- Improved code so the app can more reliable kill itself.
1.2:
- Added OTP into @string/app_name to match Google Play app name.
1.1:
- Changed enroll function to exclude linebreaks in the public key.
- Added new "u" enroll function. Read the description or GitHub page for more information. The "u" enroll function is recommended when enrolling from a computer.
- Added Md5 hash verification, to further protect against malleability attacks.
1.3:
- Improved code so the app can more reliable kill itself.
1.2:
- Added OTP into @string/app_name to match Google Play app name.
1.1:
- Changed enroll function to exclude linebreaks in the public key.
- Added new "u" enroll function. Read the description or GitHub page for more information. The "u" enroll function is recommended when enrolling from a computer.
Security scan
TRUSTED
- Developer signature verified 2020-06-02
- Scanned for malware 2020-11-10 19:37:18
- Signature SHA1 7D:76:8B:BD:F9:FA:0E:30:E5:A7:B6:EC:8C:F9:91:B3:B6:64:84:80
- File MD5 99ef26d3f484b26e116314afabc339dc
How to install QRSA OTP Authentication v1.4 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 35.5 KB of free storage.
- Grab eu.sebbe.www.qrsa_5.apk — hit the Download button above (35.5 KB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 99ef26d3f484b26e…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find eu.sebbe.www.qrsa_5.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Sebastian Nielsen, L=Goteborg, ST=Vastra Gotaland, C=SE. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open QRSA OTP Authentication — tap Open on the install screen, or find the QRSA OTP Authentication icon in your app drawer.
Common install errors for QRSA OTP Authentication
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 6.0 Marshmallow or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.