Bollcoin reported on October 18 that Ledger CEO Pascal Gauthier responded to former Mt. Gox CEO Mark Karpelès' warning about hardware implant security risks, questioning his stance, and said Ledger has always done its utmost to protect users. Pascal Gauthier said the relevant security work is extremely challenging, acknowledged Karpelès' attention to the matter, but demanded that he speak based on known facts and avoid speculation, while also mocking him: "Come on, you're no white knight, be realistic."