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。
The servers retail store registered users' cellphone figures, community crucial content and press tokens which might be essential for putting together phone calls and transmitting messages.[174] So as to pick which contacts are Sign people, cryptographic hashes with the consumer's Speak to figures are periodically transmitted for the server.[175] The server then checks to determine if those match any of the SHA-256 hashes of registered buyers and tells the customer if any matches are located.[one hundred seventy five] The hashed numbers are thereafter discarded from the server.[174] In 2014, Moxie Marlinspike wrote that it's very easy to determine a map of all feasible hash inputs to hash outputs and reverse the mapping due to minimal preimage House (the list of all feasible hash inputs) of phone quantities, and that a "sensible privateness preserving Speak to discovery remains an unsolved problem.
A number of the organizers have moved to encrypted messaging apps like Telegram and Signal, which can not be as conveniently monitored as social media marketing platforms. ^
In keeping with John Ratcliffe, as of 2025 Sign is set up by default on the equipment of most CIA staff members and its utilization is covered by conventional onboarding teaching.[111]
Sign's app icon may very well be modified with a variety of colour themes for personalization and to cover the app. The applying name can be custom made.[132] Messages may have consequences like spoilers and italics, and customers can insert each other through QR code.[133]
The whole source code on the Sign clients for Android, iOS and desktop is obtainable on GitHub underneath a free computer software license.[eleven][ten][twelve] This enables intrigued functions to look at the code and help the developers verify that almost everything is behaving as envisioned. It also permits Innovative people to compile their very own copies in the apps and Review them While using the variations that are distributed by Signal Messenger.
On 4 Oct 2016, the American Civil Liberties Union (ACLU) and Open up Whisper Devices released a number of paperwork revealing that OWS had obtained a get more info subpoena requiring them to provide information associated with two phone quantities for just a federal grand jury investigation in the 1st 50 percent of 2016.[82][83][eighty four] Only on the list of two cell phone figures was registered on Signal, and because of how the company is intended, OWS was only capable to supply "the time the person's account were produced and the last time it experienced connected to the services".
Sign involves the person offer a telephone number for verification,[141] doing away with the necessity for user names or passwords and facilitating Call discovery (see underneath).[142] The amount doesn't have to get the same as over the system's SIM card; it may also be a VoIP selection[141] or possibly a landline so long as the person can obtain the verification code and possess a individual device to build the computer software.
A calendar year afterwards, within the runup to an eventually barely attended sequel to Unite the correct in D.C., organizers appeared to stay from the System, opting as an alternative to discuss logistics in excess of Fb Messenger and the encrypted texting app Signal. ^
创建安全群组，与朋友、家人和同事保持联系，同时享有所有隐私功能�?高级隐私功能
One of the things that I was briefed on very early, senator, was from the CIA records management folks about the use of Sign to be a permissible do the job use," Ratcliffe reported. ^
端到端加密：所有消息、语音、文件传输都经过加密，确保第三方无法读取。
The declare that Sign is accustomed to fund terrorist or prison routines is definitely the justification for Turkey to criminalize the app for the final population, which Abdullah Bozkurt statements is a way the "federal government abuses its counterterrorism laws to punish critics, opponents and dissidents."[243][244]
Signal takes advantage of mobile phone quantities to register and take care of user accounts, however configurable usernames were being additional in March 2024 to permit users to hide their cell phone quantities from other consumers.