A Senior cryptography expert has claimed multiple issues with PGP email encryption. PGP is a complicated multi-step process, which requires users to keep track of the public keys of other users in order to communicate. The Federal Government was so alarmed of people using PGP encryption that they started a criminal investigation of Phil Zimmerman who offered PGP as transparent and user-friendly as transparent. Google, Yahoo! have announced to support end-to-end encryption to secure email. Despite clumsiness of the PGP implementation, the popular Internet giants such as Google. have looked forward to integrating it into their popular email services.
Source: https://thehackernews.com/2014/08/cryptography-expert-pgp-encryption-is_19.html