Keystore is used for publishing your Android application APK file, it only has one password and You can change it using keytool, placed in:
c:\\Program Files\\Java\\jre7\\bin\\keytool.exe
to change Keystore main Password:
keytool -storepasswd -keystore your.keystore Enter keystore password: New keystore password: Re-enter new keystore pasword:
to change Keystore alias Passwords:
keytool -keypasswd -keystore your.keystore -alias your-alias-name Enter keystore password: Enter key password for <your-alias-name>: New key password for <your-alias-name>: Re-enter new key password for <your-alias-name>: