Tagged Questions

Security in mobile devices. Issues concerning regular cellphones, smartphones, tablet computers and other portable information devices all fit into this category.

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0
votes
1answer
76 views

How do I secure “Data at Rest” only allowing Service API to access it from a mobile application

How do I secure data at rest from unauthorized access, but still allowing my application to access the data using user authentication over HTTPS? My scenario is as follows: Login to application ...
1
vote
3answers
106 views

Is it possible to read files in a mobile phone for carriers through mobile network alone?

Say a smartphone does not have any (internet) data plans activated (no gprs, 3g data etc.). It just connects to the tower for calls. So is it technically possible for the carrier or law enforcement ...
2
votes
2answers
818 views

how can I tell if I'm under IMSI cell phone surveillance

I've recently had an encounter with the law, the details of which I won't disclose here since the case is still in court. They took my phone, naturally. I deactivated it as soon as I was released ...
0
votes
2answers
180 views

What is the purpose of HTTPS GET vs POST requests when certificate pinning?

I have a mobile app which uses public key pinning to make sure that I only connect to servers from my CA. This works great with https, and it makes it so that nobody can really proxy my server and ...
0
votes
2answers
177 views

When Activesync policy is applied to iPhones allows thumbprint-unlock, while Android does not. Which is correct?

We have a long-standing ActiveSync device policy that requires an unlock code for all phones that use corporate email. It seems that iPhones with "swipe to unlock" and Android phones with similar ...
5
votes
2answers
955 views

GET over HTTPS vs POST over HTTPS [duplicate]

How safe is a hybrid mobile application developed using a GET Web service over HTTPS? What are the pros and cons of using it and how safe is POST over HTTPS?
0
votes
2answers
141 views

What security mechanisms are in place for iOS' custom keyboards?

Apple has just announced iOS 8. The new version appears to be more extensible than previous versions, and one of the new possiblities is to allow developers to develop custom keyboards, different than ...
0
votes
2answers
129 views

Is it safe to rely on text messages as a means on authentication?

Many websites, including banks, use text messages as their primary or secondary means of authentication. In theory, it sounds like a perfect method unless the user loses their phone or has it infected ...
1
vote
1answer
70 views

Does PCI DSS 1.4 include tablets and smartphones?

1.4 install personal firewall software on any mobile and/or employee-owned computers with direct connectivity to the Internet (for example, laptops used by employees), which are used to access the ...
4
votes
2answers
608 views

3G Femtocell at home: can anybody connect, and is all traffic encrypted?

At our office we have bad reception for 3G. We bought a Femtocell device that provides a 3G connection for one specific mobile provider. This device is connected to our network via ethernet. I cannot ...
1
vote
1answer
84 views

Should a Mobile app able to check what password is locally saved via a user facing feature?

I'm working at a company who is currently working to secure their mobile app (iOS native) by adding check points to security sensitive screens on the device (data is stored in the iOS keychain). User ...
0
votes
2answers
131 views

IMEI or IP being recognised?

Can a website see my IMEI number? I have been banned from a website for multiple accounts, although I always cleared cookies, disconnected and reconnected from "the cloud" which gives me a different ...
1
vote
0answers
84 views

How do Android reverse engineering tools extract packages/ package hierarchy present in Android apps? [closed]

I have been involved in disassembling Android apps using baksmali and dexpler. Whenever I disassemble an app, I find the packages and package hierarchy (that would have been available in development ...
7
votes
2answers
378 views

LTE networks and MITM

2G would leave you vulnerable to spoofed base stations. 3G tried to somewhat fix that using mutual authentication. Now, I tried to check how LTE handles this but I couldn’t find any usefull ...
18
votes
5answers
3k views

Are SMS,MMS stored on the network service providers' servers?

Are SMS and MMS sent via a mobile phone stored on telecommunication service providers' servers before passing them to the recipient? Does it depend on the country or does every network service ...
3
votes
2answers
166 views

How can I validate time-sensitive data is coming from a mobile app, and not being forged?

In our application, a user selects answers to questions. Their score is based on the time spent answering each question down to a tenth of a second. The server is responsible for calculating and ...
1
vote
0answers
140 views

Security risk of connecting one mobile device to another mobile device's hotspot

Is there any risk when connecting an Android Phone to a [Verizon] iPhone's Hotspot? If there are I'd like to know about solutions. The Android Phone will basically be tapping the data plan of the ...
0
votes
0answers
26 views

Does analyst API Flurry break Australian Privacy Act or any other Legal, Regulations, Compliance?

I want introduce Flurry API in my iOS app. But I heard since 2014 Australia start an act to against web page and mobile app to collect user information. My question is simple: Does using of API ...
6
votes
1answer
1k views

Imei and phone number given to unknown sources. What are the risks?

The facts: A friend put his phone number (and possibly the IMEI) for his android device into some kind of hacking PC software that promised to (and actually did) extend his Whatsapp account that was ...
1
vote
0answers
40 views

Is there a TOTP variant that does not require the user to type in a code? [closed]

We're considering a 2 factor TOTP solution on a mobile phone. However, it would be much easier for the user to somehow send the OTP to the server by pushing a button, rather than manually typing in a ...
4
votes
2answers
88 views

Why are apps for mobile devices more restrictive than for desktop?

Application devlopement for mobile devices is generally more restrictive, i.e. the apps runs in a sandboxed environment, they have many limitations when accessing the filesystem, etc. compared to ...
1
vote
0answers
207 views

What is the preferred way of using AWS (specifically S3) from mobile apps?

Adding the AWS access key and secret key directly in app code is definitely not a good approach, primarily because the app resides on the users device (unlike server side code), and can be reverse ...
2
votes
1answer
798 views

How the shopkeepers are getting MAC address of wifi enabled smartphones

It is clear that some big mall's are tracking all the wifi enabled mobile phones before they are connected to the network..how can it been done? I have the similar issue.. how to get the MAC address ...
2
votes
3answers
1k views

How to detect the “Hello packets” sent by a wifi enabled smartphone

Actually I have a case where I should able to detect the mobile phones and get some data about the device available in my network range without connecting to the network. I have seen somewhere that a ...
1
vote
2answers
407 views

GSM A5/1 encryption: Key management

I'm currently studying the A5/1 algorithm used for GSM encryption. I understood how thanks to the symmetric private Key and a public counter frame one can encrypt the communication between A and B. ...
2
votes
1answer
154 views

Is it possible to locate a cellphone's location just by ringing it?

With today's technology, is it possible to locate a cellphone's location just by ringing it, kind of like what we see in movies?
0
votes
1answer
121 views

What would be a valid approach to store private keys?

I'm implementing a mobile app which uses AES encryption algorithm to encrypt some critical values being sent to a remote server (basically, the user password), and then decrypted on the server side ...
1
vote
2answers
170 views

Protecting the remote database against tampering in a mobile app

This is the first time I face a mobile app deployment at big scale. This app needs to connect to a remote server where to store and retrieve data. I discarded connecting directly to the MySQL ...
3
votes
1answer
336 views

Is OAuth always the right choice (and when isn't it)

So I am reluctant to ask too much of a noob question, as this guy aked about a non-standard approach and got down voted a bunch, but here goes. I am creating a mobile application which needs to ...
89
votes
9answers
47k views

Why can we still crack snapchat photos in 12 lines of Ruby?

Just came across this bit of ruby that can be used to decrypt snapchat photos taken out of the cache on a phone, apparently adapted from here. To my surprise, it worked no problem, considering the ...
11
votes
1answer
918 views

Is mosh now recommended by the security experts? (2014)

Mosh has been around for a while now. Although it's claimed to be "a replacement for SSH" by its authors, mosh does actually depend on ssh to do the initial authentication, after which an instance of ...
3
votes
1answer
162 views

What are industry-standard recommended practices to protect user information in an Android app?

I am developing an Android app that will potentially handle sensitive user data, and some of it may be even considered medical data (for example user height, weight, alergies, etc). What would be the ...
1
vote
2answers
554 views

Is there any documentation or reviews about LINE messenger security?

I tried to find any documentation about the security of LINE messenger, but I couldn't. Is there any documentation or reviews about the communication protocol it uses, and whether or not it uses ...
4
votes
4answers
228 views

Contact person by phone, when their phone might have malware

I have a problem setting where I want to contact a user by phone, and where I need to protect the integrity of the phone call as much as possible. I'm wondering about how to design the interaction in ...
3
votes
1answer
399 views

Is it safe to use the official Facebook apps in a public Wifi?

I know, that my login credentials are sent in clear text for every body to read, when I log into facebook without using https from my mobile phone's browser in an public / non encrypted wifi. And I ...
0
votes
1answer
2k views

What is the risk of leaking IMEI / IMSI numbers over a network

Should I worry if a developer programmed an app to send IMEI / IMSI number of the phone where the app is installed back to him? What can an attacker do with such information?
0
votes
0answers
29 views

Secure data with server and RSA? [duplicate]

the RSA system uses a private key to read the content encrypted with the public key. If I make a game for mobile, and want to save the data : I guess I cannot save the private key on the device. If ...
3
votes
1answer
127 views

PCI Complient Storing Credit Card Data On Offline Tablet

I have a client that does work in rural areas where there are no cellphone or internet connections. They need a way to take credit card information in the field, bring it back to their office where ...
2
votes
4answers
761 views

Tails like OS for Smartphones

In Jacob Applebaum's latest talk at the 30c3 conference, he advised all journalists to use Tails or similar OS for their laptops. Does anyone know of a similar OS or functionality for Smartphones? ...
0
votes
1answer
127 views

Performance of biometric authentication on cell phones as of 2014?

How well do the various biometric authentication methods currently perform in regards to precision and recall? Can anyone cite a relevant research article?
0
votes
1answer
195 views

Cellular Mobile Network Vulnerabilities - Is VPN the solution?

Do current mobile cellular networks like 3G offer enough security? The article from Info-Security states that 3G encryption cracked in less than two hours. Could a eavesdropper or ...
-1
votes
1answer
108 views

physical access proof smart card for disk encryption [closed]

Current full disk encryption on mobile devices rely on low entropy passwords like PIN numbers or pattern locks. Being able to use a smartcard with such mobile devices is a tempting idea. I know that ...
1
vote
2answers
218 views

Is there man in middle attack when using mobile phone calls?

My question is about the encryption between me and my mobile operator. My mobile operator uses A5/1. I use Samsung. Sometimes I see the symbol G on my phone which means GPRS. I don't know whether it ...
10
votes
3answers
646 views

Is Gmail showing images by default a good idea for privacy?

Google have decided to show images in Gmail messages accessed via the web, iOS and Android by default: Instead of serving images directly from their original external host servers, Gmail will now ...
2
votes
2answers
480 views

How to prevent user's mobile phone position tracked

Trying to follow up this post How to trace a (mobile) phone? , the answers on how to prevent being tracked while you own a mobile phone are: You cant. (even if you use disposable phones etc) 1) Why a ...
0
votes
2answers
225 views

Does a simple mobile REST API need HTTPS?

Let's say I have a really simple mobile app with a server API. For example some kind of Q&A app, where users answer questions to win some points ('Who wants to be a Millionaire' kind of game). ...
1
vote
0answers
442 views

Securing REST API for use by mobile apps

I developed a REST API whose clients are mobile apps/websites under my control (API is not open to anyone). Users log into my mobile app/website with their Facebook or g+ login. I'd like to secure ...
0
votes
1answer
73 views

Hardware encryption for mobile data

Assume a requirement for creating a custom application for Android or iOS smartphones, which will send and receive data (documents, e-mails, etc.) to/from a corporate server, perhaps after local ...
0
votes
0answers
39 views

What kind of security do WhatsApp and Viber use? [duplicate]

What kind of security do chat applications implement to preserve message integrity & confidentiality?
1
vote
1answer
1k views

iOS: sandbox of an iphone app

I am new to iOS so I do have only limited knowledge about iOS in general. For self learning purposes, I would like to know several things as I am quite confused after searching the web. I do know ...