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。 [a Hundred and five] The specter of this assault may be mitigated by enabling Signal's Registration Lock attribute, a method of two-factor authentication that requires the consumer to enter a PIN to sign-up the cell phone number on a completely new device.[146] [152][153] In July 2017, researchers from https://www.lt-signal.com/