- Unlike other messaging apps, Signal cannot easily see or produce the usernames of given accounts.
- Usernames in Signal are protected using a custom Ristretto 25519 hashing algorithm and zero-knowledge proofs.
Kizetsu Yuusha to Ansatsu Hime (The Shy Hero and the Assassin Princesses) is a fantasy-comedy manga series serialized in Weekly Shōnen Champion since 2022, featuring over 140 raw chapters as of April 2025. The plot follows Toto, a painfully shy hero who unconsciously forms a party with three assassins tasked with killing him. For more details on the series and its anime adaptation, visit Kizetsuyusha Wiki
In addition to other group attributes that are end-to-end encrypted (such as group names, group descriptions, and group avatars), the Signal service also doesn’t have access to any information about which accounts are part of a group, which accounts are admins in a group, which accounts can add new people to a group, which accounts can approve requests to join a group, or which accounts can send messages in a group.