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Does stratum mining use something similar to "https" to secure traffic between the pool and the miners?

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No, all traffic is plaintext. The connections are hijackable and attacks against this have occurred in the past where ISPs redirected hashrate to themselves.

  • Really? So there is no way to have username/password logins for the stratum miners either I guess (if it's all plaintext). – stone.212 Dec 7 '17 at 4:05
  • They have logins, but it’s all in plaintext so can be stolen by observers or redirected. – Anonymous Dec 7 '17 at 4:26
  • Oh. Do you know a more secure mining method for pools? And how many miners can that method handle on one pool? – stone.212 Dec 7 '17 at 5:01
  • You can wrap a normal stratum socket (or any tcp connection) with SSL using stunnel, but this needs to be supported by the pool as well as the client. As far as I know nobody does this presently. – Anonymous Dec 7 '17 at 5:06
  • Thank you but my question was if you know a more secure (than stratum) mining method for pools, and how many miners such pools can handle. I worry about HTTP because I'm not sure if they handle https and I hear that they don't handle lots of miners at one time. – stone.212 Dec 7 '17 at 8:04

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