Bollcoin, October 26 — According to Teh Block, open-source Bitcoin hardware manufacturer Foundation said it has detected spam emails being sent from its official domain. The company traced the issue to one or more compromised Cloudflare API keys, which have now been revoked. In addition, the malicious domains used in the emails have been taken down. Foundation emphasized that funds stored in Passport devices remain safe and that the hardware itself was not compromised.