Quote from: espressodoppio on October 19, 2019, 12:34:24 AM

I like the thought of using blockchain as a part of information security. The main goal is to maintain confidentiality while providing accessibility. However PGP is rather old. Are you also asking if we should integrate the complexity of the blockchain to add more security layers to the protocol for making informational or simple contract transactions (not just monetary) more secure?

While PGP initially released in 1991, there are many updates/improvements on PGP such as OpenPGP and PGP/MIME.
Besides, ECDSA and secp256k1 which used by Bitcoin is relatively old.

Quote from: aliashraf on October 19, 2019, 06:31:54 AM

As of using bitcoin public keys for encryption of messages, it looks rather a bad practice both because of address re-use and lack of key management and no support for fame and mapping keys to real-world persons and entities. Note that implementing such a system on bitcoin would be worse because of dangerous privacy implications.

You could allocate an Bitcoin address/public key only for encrypt & sign message.