The point: End-to-end encrypted group chat protocols do not guarantee that all users receive identical messages, enabling manipulation and misinformation.
Encrypted group chats currently offer no technical guarantees that all participants see identical content – attackers can selectively deliver different versions of a message to individual group members.
In group chats running through established messaging services, there is a fundamental vulnerability: there are no cryptographic or technical mechanisms that guarantee all participants receive exactly the same messages in identical form and sequence. An attacker could theoretically deliver different versions of a message to various group members without detection – even if connections are fully encrypted.
Common chat protocols, particularly those with end-to-end encryption, primarily focus on protection against eavesdropping by third parties during transmission. However, they do not consistently verify whether a message arrives unaltered at all recipients or whether the sender intentionally sends different content to individual group members. This opens vectors for subtle manipulation and deliberate misinformation within groups.
These findings are relevant to CISOs because group chats are increasingly used in enterprise contexts for sensitive communication. The incident safety and forensic reliability of chat protocols are therefore more limited than often assumed. Organizations should consider this limitation when evaluating messaging solutions and consider whether additional control mechanisms are required for critical or compliance-relevant communication.
Source: www.heise.de · Published 30 July 2026
Lumi AI News — AI-assisted curation pursuant to Article 50 EU AI Act. Paraphrase and classification by Lumi News Pipeline v1.7.3.