Jack Dorsey, CEO of Block and co-founder of Twitter, launched an open source chat app named Bitchat, claiming it to be secure and private without a centralized infrastructure.
Bitchat uses Bluetooth and end-to-end encryption and is decentralized, making it potentially secure in high-risk environments; however, it has not undergone security testing or review.
Security researchers have raised concerns about Bitchat's security, as the code has not been reviewed for vulnerabilities, and it has been found that attackers can impersonate users and intercept identities.
Despite claims by Dorsey, security flaws in Bitchat have been reported, including issues with identity authentication, forward secrecy, and a potential buffer overflow bug, prompting warnings not to trust the app's security.