Do you have experience implementing or verifying digital signatures of applications?

Yes, I have experience working with digital signatures for applications on Android. This includes:

• Signing APKs with a keystore to ensure the integrity and authenticity of the application
• Using Android Studio or command-line tools (apksigner, jarsigner) for signing
• Verifying signatures when publishing to Google Play
• In some cases, implementing digital signature verification within the app to prevent tampering

Example command for signing an APK:

apksigner sign --ks my-release-key.jks app-release-unsigned.apk

A digital signature guarantees that the application has not been altered after building and belongs to a specific developer.