POW Server & Client

The implementation of the “Word of Wisdom” tcp server and client with DDOS attacks protection

• TCP server is protected from DDOS attacks with the Prof of Work ( https://en.wikipedia.org/wiki/Proof_of_work ) concept
• The Hashcash ( https://en.wikipedia.org/wiki/Hashcash ) is used as the PoW algorithm, because it is the most popular challenge-response algorithm for preventing DDOS attacks
• After Prof Of Work verification, client prints a random quote from “word of wisdom” book quotes

Install & Run

make docker_build
make docker_run
make docker_stop

or

• setup env variables

POW_HOST (default "localhost")
POW_PORT (default "8081")
POW_BITS (default "24")

• run

make mod
make server
make client

Additional information

Not implemented (because of PoC):

• tests
• connection timeouts
• persistent hash storage, real resource validation
• connection encryption