点按 新增标签，建立新的标签名称与新增成员，或于新增成员中，将朋友加入已设定的标签内。 [105] The Threat of this assault is often mitigated by enabling Sign's Registration Lock function, a kind of two-issue authentication that needs the person to enter a PIN to register the cell phone number on a completely new device.[146] A lot of the organizers have moved to encrypted https://www.lt-signal.com/