It’s 2011 and there are now more phones in the world than computers. Every day, more of these phones become smartphones AKA portable computers. Unfortunately, if your phone can browse the web and check email, you will be targeted by some of the same malicious attacks and scams that go after your PC.
Here are a few basic tips from the F-Secure Labs on how to secure your mobile phone.
Mobile security is a new concept for many people. So let us know what you want to know about the topic in the comments of this post.
Yet another big vulnerability in the headlines. The Metaphor hack was discovered by Israel-based NorthBit and can be used to take control over almost any Android device. The vulnerability can be exploited from video files that people encounter when surfing the web. It affects all versions of Android except version 6, which is the latest major version also known as Marshmallow. But why is this such a big deal? Severe vulnerabilities are found all the time and we receive updates and patches to fix them. A fast update process is as a matter of fact a cyber security cornerstone. What makes this issue severe is that it affects Android, which to a large extent lack this cornerstone. Android devices are usually not upgraded to new major versions. Google is patching vulnerabilities, but these patches’ path to the devices is long and winding. Different vendors’ practices for patching varies a lot, and many devices will never receive any. This is really a big issue as Android’s smartphone market share is about 85% and growing! How is this possible? This underlines one of the fundamental differences between the Android and iOS ecosystems. Apple’s products are planned more like the computers we are used to. They are investments and will be maintained after purchase. iOS devices receive updates, and even major system upgrades, automatically and free of charge. And most users do install them. Great for the security. Android is a different cup of tea. These devices are mostly aimed at a cheaper market segment. They are built as consumables that will be replaced quite frequently. This is no doubt a reasonable and cost-saving strategy for the vendors. They can focus on making software work on the currently shipping devices and forget about legacy models. It helps keeping the price-point down. This leads to a situation where only 2,3% of the Android users are running Marshmallow, even half a year after release. The contrast against iOS is huge. iOS 9 has been on the market about the same time and already covers 79% of the user base. Apple reported a 50% coverage just five days after release! The Android strategy backfires when bugs like Metaphor are discovered. A swift and compete patch roll-out is the only viable response, but this is not available to all. This leaves many users with two bad options, to replace the phone or to take a risk and keep using the old one. Not good. One could think that this model is disappearing as we all grow more and more aware of the cyber threats. Nope, development actually goes in the opposite direction. Small connected devices, IoT-devices, are slowly creeping into our homes and lives. And the maintenance model for these is pretty much the same as for Android. They are cheap. They are not expected to last long, and the technology is developing so fast that you would be likely to replace them anyway even if they were built to last. And on top of that, their vendors are usually more experienced in developing hardware than software. All that together makes the IoT-revolution pretty scary. Even if IoT-hacking isn’t one of the ordinary citizen’s main concerns yet. So let’s once again repeat the tree fundamental commands for being secure on-line. Use common sense, keep your device patched and use a suitable security product. If you have a system that provides regular patches and updates, keep in mind that it is a valuable service that helps keeping you safe. But it is also worth pointing out that nothing as black and white. There are unfortunately also problematic update scenarios. Safe surfing, Micke Photo by etnyk under CC
Tuesday February 9th is Safer Internet Day this year. An excellent time to sit down and reflect about what kind of Internet we offer to our kids. And what kind of electronic environment they will inherit from us. I have to be blunt here. Our children love their smartphones and the net. They have access to a lot of stuff that interest them. And it’s their new cool way to be in contact with each other. But the net is not designed for them and even younger children are getting connected smartphones. Technology does not support parents properly and they are often left with very poor visibility into what their kids are doing on-line. This manifests itself as a wide range of problems, from addiction to cyber bullying and grooming. The situation is not healthy! There are several factors that contribute to this huge problem: The future’s main connectivity devices, the handhelds, are not suitable for kids. Rudimentary features that help protect children are starting to appear, but the development is too slow. Social media turns a blind eye to children’s and parents’ needs. Most services only offer one single user experience for both children and adults, and do not recognize parent-child relationships. Legislation and controlling authorities are national while Internet is global. We will not achieve much without a globally harmonized framework that both device manufacturers and service providers adhere to. Let’s take a closer look at these three issues. Mobile devices based on iOS and Android have made significant security advances compared to our old-school desktop computers. The sandboxed app model, where applications only have limited permissions in the system, is good at keeping malware at bay. The downside is however that you can’t make traditional anti-malware products for these environments. These products used to carry an overall responsibility for what happens in the system and monitor activity at many levels. The new model helps fight malware, but there’s a wide range of other threats and unsuitable content that can’t be fought efficiently anymore. We at F-Secure have a lot of technology and knowledge that can keep devices safe. It’s frustrating that we can’t deploy that technology efficiently in the devices our kids love to use. We can make things like a safe browser that filters out unwanted content, but we can’t filter what the kids are accessing through other apps. And forcing the kids to use our safe browser exclusively requires tricky configuration. Device manufacturers should recognize the need for parental control at the mobile devices. They should provide functionality that enable us to enforce a managed and safe experience for the kids across all apps. Privacy is an issue of paramount importance in social media. Most platforms have implemented good tools enabling users to manage their privacy. This is great, but it has a downside just like the app model in mobile operating systems. Kids can sign up in social media and enjoy the same privacy protection as adults. Also against their parents. What we need is a special kind of child account that must be tied to one or more adult accounts. The adults would have some level of visibility into what the kid is doing. But full visibility is probably not the right way to implement this. Remember that children also have a certain right to privacy. A good start would be to show whom the kid is communicating with and how often. But without showing the message contents. That would already enable the parents to spot cyberbullying and grooming patterns in an early phase. But what if the kids sign up as adults with a false year of birth? There’s currently no reliable way to stop that without implementing strong identity checks for new users. And that is principally unfeasible. Device control could be the answer. If parents can lock the social media accounts used on the device, then they could at the same time ensure that the kid really is using a child account that is connected to the parents. The ideas presented here are all significant changes. The device manufacturers and social media companies may have limited motivation to drive them as they aren’t linked to their business models. It is therefore very important that there is an external, centralized driving force. The authorities. And that this force is globally harmonized. This is where it becomes really challenging. Many of the problems we face on Internet today are somehow related to the lack of global harmonization. This area is no exception. The tools we are left with today are pretty much talking to the kids, setting clear rules and threatening to take away the smartphone. Some of the problems can no doubt be solved this way. But there is still the risk that destructive on-line scenarios can develop for too long before the parents notice. So status quo is really not an acceptable state. I also really hope that parents don’t get scared and solve the problem by not buying the kids a smartphone at all. This is even worse than the apparent dangers posed by an uncontrolled net. The ability to use smart devices and social media will be a fundamental skill in the future society. They deserve to start practicing for that early. And mobile devices are also becoming tools that tie the group together. A kid without a smartphone is soon an outsider. So the no smartphone strategy is not really an alternative anymore. Yes, this is an epic issue. It’s clear that we can’t solve it overnight. But we must start working towards these goals ASAP. Mobile devices and Internet will be a cornerstone in tomorrow’s society. In our children’s society. We owe them a net that is better suited for the little ones. We will not achieve this during our kids’ childhood. But we must start working now to make this reality for our grandchildren. Micke
How to balance between privacy and crime fighting? That’s one of the big questions now when we are entering the digitally connected era. Our western democracies have a set of well-established and widely accepted rules that control what authorities can and can’t do. One aspect of this has been in the headlines lately. That’s your right to “plead the Fifth”, as the Americans say. Laws are different in every country, but most have something similar to USA’s Fifth Amendment. The beef is that “No person … shall be compelled in any criminal case to be a witness against himself,…”. Or as often expressed in popular culture: “You have the right to remain silent.” With more fancy words, protection against self-incrimination. What this means in practice is that no one can force you to reveal information if authorities are suspecting you of a crime. You have the right to defend yourself, and refusal to disclose information is a legal defense tactic. But the police can search your home and vehicles for items, if they have the proper warrant, and there’s nothing you can do to stop that. In short, the Fifth Amendment protects what you know but not what you have. Sounds fair. But the problem is that there was no information technology when these fundamental principles were formed back in 1789. The makers of the Fifth Amendment, and similar laws in other countries, could not foresee that “what you know” will expand far beyond our own brains. Our mobile gadgets, social media and cloud services can in the worst case store a very comprehensive picture of how we think, whom we have communicated with, where we have been and what we have done. All this is stored in devices, and thus available to the police even if we exercise our right to remain silent. Where were you last Thursday at 10 PM? Do you know Mr John Doe? What's the nature of your relationship with Ms Jane Doe? Have you purchased any chemicals lately? Do you own a gun? Have you traveled to Boston during the last month? Have you ever communicated with email@example.com? These are all questions that an investigator could ask you. And all may still be answered by data in your devices and clouds even if you exercise your right to remain silent. So has the Fifth Amendment lost its meaning? Would the original makers of the amendment accept this situation, or would they make an amendment to the amendment? The situation is pretty clear for social media and cloud storage. This data is stored in some service provider’s data center. The police can obtain a warrant and then get your data without any help from you.(* Same thing with computers they take from your home. The common interpretation is that this isn’t covered by the Fifth Amendment. But what if you stored encrypted files on the servers? Or you use a device that encrypts its local storage (modern Androids and iPhones belong to this category). The police will in these cases need the password. This is something you know, which makes it protected. This is a problem for the police and countries have varying legislation to address the problem. UK takes an aggressive approach and makes it a crime to refuse revealing passwords. Memorized passwords are however protected in US, which was demonstrated in a recent case. Biometric authentication is yet another twist. Imagine that you use your fingerprint to unlock your mobile device. Yes, it’s convenient. But it may at the same time reduce your Fifth Amendment protection significantly. Your fingerprint is what you are, not what you know. There are cases in the US where judges have ruled that forcing a suspect to unlock a device with a fingerprint isn’t in conflict with the constitution. But we haven’t heard the Supreme Court’s ruling on this issue yet. So the Fifth Amendment, and equal laws in other countries, is usually interpreted so that it only protects information stored in your brain. But this definition is quickly becoming outdated and very limited. This is a significant ethical question. Should we let the Fifth Amendment deteriorate and give crime fighting higher priority? Or should we accept that our personal memory expands beyond what we have in our heads? Our personal gadgets do no doubt contain a lot of such information that the makers of Fifth Amendment wanted to protect. If I have the right to withhold a piece of information stored in my head, why should I not have the right to withhold the same information stored elsewhere? Is there really a fundamental difference that justifies treating these two storage types differently? These are big questions where different interests conflict, and there are no perfect solutions. So I pass the question to you. What do you think? [polldaddy poll=9102679] Safe surfing, Micke Image by OhLizz (* It is this simple if the police, the suspect and the service provider all are in the same country. But it can get very complicated in other cases. Let's not go there now as that would be beside the point of this post.