wyBuild comes with the ability to sign your updates. What this means is that only updates signed by you can be installed to your end-users.
How update signing works
The first time you save your wyBuild project a 2048-bit RSA Public/Private key is generated. The private key is used to sign your updates after they are built. The public key is included in "client.wyc" and is used to validate updates. If an update fails to validate, then wyUpdate rejects the update.
Changing the signing keys
The first time you save a project your update signing keys are generated automatically. However you can change these keys or generate new signing key by click File->Properties and going to the "Signing" tab.
Click "Generate New Keys" or copy and paste another key from another project.