Translations:How VeriBlock PoP vBFI Protects Altchains/18/en

An attacker sent a transaction to a would-be victim in a VeriBlock block after 39580, and then started building an attacking VeriBlock chain and performing PoP publications. The attacking chain is longer and has more PoW, and without PoP it would win and result in a chain reorganization/double-spend. In the picture below, the VeriBlock PoP security explorer shows keystones (every 20 blocks for VeriBlock), such that the attacker is at least 40 blocks longer than the main chain.