Here is the Advantages:

1. This way can easily control or analyze encrypted data without knowing your data to anyone.
2. Safer than any other encryption forms.
3. It uses a PUBLIC KEY for encryption.
4. It will not visible to any parties, ISP( Internet Service Provider) or even service provider like Google.
5. Data can't be manipulate.

Disadvantage:

1. In reality, despite the technology improves over the years, other people who has business it is not user friendly.
2. Requires application modifications and a specialized client-server.