PANews reported on November 27th that Ethereum co-founder Vitalik Buterin stated in an article on the X platform that encrypted communication tools like Signal are crucial for protecting users' digital privacy. Currently, there are two key directions for advancement in this field: enabling permissionless account creation and ensuring metadata privacy. The instant messaging applications Session and SimpleX are actively exploring these directions. To this end, Buterin donated 128 ETH to each of them.

However, Buterin pointed out that these two software programs are still imperfect and fall short of the ideal user experience and security performance. He stated, "Achieving robust metadata privacy protection requires decentralization, but decentralization is difficult, and users' demand for multi-device support adds further challenges. At the same time, achieving Sybi/DoS protection capabilities on the message routing network and the user end (without mandatory reliance on phone numbers) further increases the technical difficulty. These complex issues urgently require more attention and research from professionals."