According to Odaily Planet Daily, Edward Snowden, a whistleblower and former contractor of the National Security Agency, has issued a stern warning to Bitcoin developers. This comes after the United States stepped up its crackdown on privacy-oriented software and Zksnacks shut down its coordinated coinjoin service. Snowden stressed that time is running out for enhanced privacy and insisted that it must be integrated at the protocol level. Previously, Snowden had praised the privacy-focused cryptocurrency zcash (ZEC).