Bitcoin Cash blocks tagged with "Satoshi Nakamoto," rumors of impending attack

Mysteriously, 25 percent of mined Bitcoin Cash blocks are being tagged with "Satoshi Nakamoto." Given the May 15th hard fork as part of a scheduled protocol upgrade, it is rumored that the tagging is a miner signaling 51 percent attack.

25th, beginning at 03:22 PDT, blocks began to appear on the Bitcoin Cash blockchain tagged with "Satoshi Nakamoto" in the mined blocks.

Since a block that is mined has no parent transactions, the section can have arbitrary data and contain messages.

30th, 11:35 PDT the elusive miner has mined a total of 361 blocks yielding 4512.5 BCH worth $1.15 million.

According to WhatToMine, the miner is also foregoing profit to mine Bitcoin Cash.

Currently, BCH is less profitable to mine than BTC, suggesting the miner is "Keeping the chain slightly unprofitable," as said by another commentator.

Some miners may switch to mining BTC, allowing the mysterious miner to control an even greater percentage of the Bitcoin Cash network's hashrate.

Given the miner controls more than 25 percent of the network's hashrate, there are several different attacks they could execute.

The miner could mine empty blocks, choosing not to add transactions to the blockchain and thus cause congestion on the network.

If the mysterious miner's hashrate increases, they could conduct a 51 percent and reorganization attacks on the network-double spending or reversing transactions.