[B] スーチー氏から家族に手紙が届く　ミャンマー・クーデターから３年で初

日刊ベリタ
2 months 3 weeks ago
2021年２月の国軍クーデター後、首都ネピドーに拘束されているミャンマーのアウンサンスーチー国家顧問から、家族宛てに初めての手紙が届いたことが明らかになった。英国在住の次男キム・アリス氏によると、「拘束されて3年が経過するが、今でも精神的にしっかりしている。しかし、齢のせいか以前のように健康ではない」と書かれているという。
日刊ベリタ

Worried About AI Voice Clone Scams? Create a Family Password

EFF update
2 months 3 weeks ago

Your grandfather receives a call late at night from a person pretending to be you. The caller says that you are in jail or have been kidnapped and that they need money urgently to get you out of trouble. Perhaps they then bring on a fake police officer or kidnapper to heighten the tension. The money, of course, should be wired right away to an unfamiliar account at an unfamiliar bank. 

It’s a classic and common scam, and like many scams it relies on a scary, urgent scenario to override the victim’s common sense and make them more likely to send money. Now, scammers are reportedly experimenting with a way to further heighten that panic by playing a simulated recording of “your” voice. Fortunately, there’s an easy and old-school trick you can use to preempt the scammers: creating a shared verbal password with your family.

The ability to create audio deepfakes of people's voices using machine learning and just minutes of them speaking has become relatively cheap and easy to acquire technology. There are myriad websites that will let you make voice clones. Some will let you use a variety of celebrity voices to say anything they want, while others will let you upload a new person’s voice to create a voice clone of anyone you have a recording of. Scammers have figured out that they can use this to clone the voices of regular people. Suddenly your relative isn’t talking to someone who sounds like a complete stranger, they are hearing your own voice. This makes the scam much more concerning. 

Voice generation scams aren’t widespread yet, but they do seem to be happening. There have been news stories and even congressional testimony from people who have been the targets of voice impersonation scams. Voice cloning scams are also being used in political disinformation campaigns as well. It’s impossible for us to know what kind of technology these scammers used, or if they're just really good impersonations. But it is likely that the scams will grow more prevalent as the technology gets cheaper and more ubiquitous. For now, the novelty of these scams, and the use of machine learning and deepfakes, technologies which are raising concerns across many sectors of society, seems to be driving a lot of the coverage. 

The family password is a decades-old, low tech solution to this modern high tech problem. 

The first step is to agree with your family on a password you can all remember and use. The most important thing is that it should be easy to remember in a panic, hard to forget, and not public information. You could use the name of a well known person or object in your family, an inside joke, a family meme, or any word that you can all remember easily. Despite the name, this doesn't need to be limited to your family, it can be a chosen family, workplace, anarchist witch coven, etc. Any group of people with which you associate can benefit from having a password. 

Then when someone calls you or someone that trusts you (or emails or texts you) with an urgent request for money (or iTunes gift cards) you simply ask them the password. If they can’t tell it to you, then they might be a fake. You could of course further verify this with other questions,  like, “what is my cat's name” or “when was the last time we saw each other?” These sorts of questions work even if you haven’t previously set up a passphrase in your family or friend group. But keep in mind people tend to forget basic things when they have experienced trauma or are in a panic. It might be helpful, especially for   people with less robust memories, to write down the password in case you forget it. After all, it’s not likely that the scammer will break into your house to find the family password.

These techniques can be useful against other scams which haven’t been invented yet, but which may come around as deepfakes become more prevalent, such as machine-generated video or photo avatars for “proof.” Or should you ever find yourself in a hackneyed sci-fi situation where there are two identical copies of your friend and you aren’t sure which one is the evil clone and which one is the original. 

Spider-man hopes The Avengers haven't forgotten their secret password!

The added benefit of this technique is that it gives you a minute to step back, breath, and engage in some critical thinking. Many scams of this nature rely on panic and keeping you in your lower brain, by asking for the passphrase you can also take a minute to think. Is your kid really in Mexico right now? Can you call them back at their phone number to be sure it’s them?  

So, go make a family password and a friend password to keep your family and friends from getting scammed by AI impostors (or evil clones).

Cooper Quintin

What Apple's Promise to Support RCS Means for Text Messaging

EFF update
2 months 3 weeks ago

You may have heard recently that Apple is planning to implement Rich Communication Services (RCS) on iPhones, once again igniting the green versus blue bubble debate. RCS will thankfully bring a number of long-missing features to those green bubble conversations in Messages, but Apple's proposed implementation has a murkier future when it comes to security. 

The RCS standard will replace SMS, the protocol behind basic everyday text messages, and MMS, the protocol for sending pictures in text messages. RCS has a number of improvements over SMS, including being able to send longer messages, sending high quality pictures, read receipts, typing indicators, GIFs, location sharing, the ability to send and receive messages over Wi-Fi, and improved group messaging. Basically, it's a modern messaging standard with features people have grown to expect. 

The RCS standard is being worked on by the same standards body (GSMA) that wrote the standard for SMS and many other core mobile functions. It has been in the works since 2007 and supported by Google since 2019. Apple had previously said it wouldn’t support RCS, but recently came around and declared that it will support sending and receiving RCS messages starting some time in 2024. This is a win for user experience and interoperability, since now iPhone and Android users will be able to send each other rich modern text messages using their phone’s default messaging apps. 

But is it a win for security? 

On its own, the core RCS protocol is currently not any more secure than SMS. The protocol is not encrypted by default, meaning that anyone at your phone company or any law enforcement agent (ordinarily with a warrant) will be able to see the contents and metadata of your RCS messages. The RCS protocol by itself does not specify or recommend any type of end-to-end encryption. The only encryption of messages is in the incidental transport encryption that happens between your phone and a cell tower. This is the same way it works for SMS.

But what’s exciting about RCS is its native support for extensions. Google has taken advantage of this ability to implement its own plan for encryption on top of RCS using a version of the Signal protocol. As of now, this only works for users who are both using Google’s default messaging app (Google Messages), and whose phone companies support RCS messaging (the big three in the U.S. all do, as do a majority around the world). If encryption is not supported by either user the conversation continues to use the default unencrypted version. A user’s phone company could actively choose to block encrypted RCS in a specific region or for a specific user or for a specific pair of users by pretending it doesn’t support RCS. In that case the user will be given the option of resending the messages unencrypted, but can choose to not send the message over the unencrypted channel. Google’s implementation of encrypted RCS also doesn’t hide any metadata about your messages, so law enforcement could still get a record of who you conversed with, how many messages were sent, at what times, and how big the messages were. It's a significant security improvement over SMS, but people with heightened risk profiles should still consider apps that leak less metadata, like Signal. Despite those caveats this is a good step by Google towards a fully encrypted text messaging future.

Apple stated it will not use any type of proprietary end-to-end encryption–presumably referring to Google's approach—but did say it would work to make end-to-end encryption part of the RCS standard. Avoiding a discordant ecosystem with a different encryption protocol for each company is desirable goal. Ideally Apple and Google will work together on standardizing end-to-end encryption in RCS so that the solution is guaranteed to work with both companies’ products from the outset. Hopefully encryption will be a part of the RCS standard by the time Apple officially releases support for it, otherwise users will be left with the status quo of having to use third-party apps for interoperable encrypted messaging.

We hope that the GSMA members will agree on a standard soon, that any standard will use modern cryptographic techniques, and that the standard will do more to protect metadata and downgrade attacks than the current implementation of encrypted RCS. We urge Google and Apple to work with the GSMA to finalize and adopt such a standard quickly. Interoperable, encrypted text messaging by default can’t come soon enough.

Cooper Quintin