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Keychat's one-on-one chats meet the five requirements mentioned in the note below.
When designing its group chat features, Keychat prioritizes meeting these same five requirements as much as possible, rather than focusing on supporting a larger number of group members.
Keychat now offers a "small group" feature, which is intended for a limited number of participants.
When a group member sends a message within a small group, they are essentially sending an individual one-on-one message to each participant.
This method simulates a group chat through multiple one-on-one private chats.
Consequently, it almost retains the security features of one-on-one chats and meets the aforementioned five requirements.