Different passwords for different services of one google account

Google is undoubtedly a leader in providing useful and convenient services. All services are combined under one account. Services have an API, which means that you can write third-party applications to work with certain google services. For example, Google Reader is convenient to use as an archive of rrs subscriptions, but I personally find it convenient to read the rss feed using FeedDemon . By the way, I recommend it to everyone if you have not heard about this program.

FeedDemon has the ability to synchronize with Google Reader and, of course, you need a password for authorization with the ability to save a password, which is completely unsafe. And here is my main idea -It would be nice if you could create special passwords to access certain services of your account and with the ability to set permissions (for example, read only, etc.), and use the main (master password) for administrative work - this will allow you to use passwords in third-party applications.