Obfuscation refers to hiding the intended meaning of communication.

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0
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2answers
98 views

Hiding (Obfuscating) Java script [on hold]

So i heard that obfuscating java script is useless and waste of time because anyone with a little of skill can decode your code. So i want to test that. This code will display a alert box saying hey ...
3
votes
4answers
125 views

Securing Data at Rest in Android

Here's a situation. I am the author of an app that allows my customers to stream videos on their local android device. I also allow them to download the video and store it locally on their android ...
5
votes
1answer
154 views

Should veil framework produce packed and obfuscated binaries which bypass virustotal?

I have been working with the veil framework to test an internal IDS system I have in place. I have used a public malware sample which produces an 8/53 hit score on Virustotal and run it through the ...
2
votes
1answer
72 views

Preventing reverse engineering through obfuscation and LLVM [closed]

I just came across this concept of "obfuscation" and randomizing the binary so that attacker can't use it to reverse engineer a particular piece of software. Can anyone point me to resources which ...
7
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4answers
3k views

What does this malicious PHP script do? [closed]

Somebody hacked my site and uploaded this script (template46.php) to my webroot and its content is: <?php $vIIJ30Y = Array('1'=>'F', '0'=>'j', '3'=>'s', '2'=>'l', '5'=>'M', ...
3
votes
1answer
264 views

What methods are websites using to prevent direct access to media?

I really hope this question isn't off-topic... Background The question pertains to media security (video, audio, etc.), where the media in question is digitally protected (legally, DMCA-style) or ...
56
votes
4answers
5k views

Is using 'dot' and 'at' in email addresses in public text still useful?

When entering your email address publicly, a practice is to replace . with text dot and @ with text at. I assume that the reasoning is that this way automatic email-collector robots won't match your ...
23
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5answers
5k views

Never spell a word the same way twice?

A long time ago I was reading about Renaissance-era ciphers and I remembered this quote: David Kahn, author of The Codebreakers, quotes Giovanni Battista Porta who published, in 1563, a famous ...
1
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4answers
129 views

Data anonymization/ encryption requirement

I did check out the previous postings and didnt find what I was looking for- apologies if this is a repetition. I am working on an analytics engagement for a customer and he needs to share access to ...
3
votes
2answers
165 views

Security through obscurity - “https requests” are safe?

In an iPhone app that utilizes plain text (unencrypted) XML as the contents of its http POST requests over https to the app server; how would someone be able to discover the "format" of the plain text ...
6
votes
5answers
6k views

Obfuscating JavaScript code

Some Flash developers are afraid of JavaScript. Their point of view: Stealing JS source code is effortless, one would just 'view source' and copy it. Yes, you can decompile Flash bytecode, however it ...
-4
votes
1answer
100 views

Email obfuscation/munging recent research [closed]

Does anyone know of any recent (past year or two) research into email obfuscation/munging? All I can find are tests done five to ten years ago. I'm trying to decide whether it's something still ...
12
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2answers
2k views

Describe an example of indistinguishability obfuscation or functional encryption

As described in Perfecting the Art of Sensible Nonsense, a major breakthrough in cryptography research was published in the summer of 2013: Candidate Indistinguishability Obfuscation and Functional ...
4
votes
2answers
118 views

Does HTTP Digest Auth provide any increased security in this scenario?

Say I have a website running a popular CMS like Wordpress only over SSL through HTTP Strict Transport Security. Prior, the backend administrator login page could be accessed by anybody simply by ...
1
vote
1answer
300 views

GnuPG / OpenPGP: How to eliminate redundancy in PGP private key?

I examined a few randomly generated private keys generated by Gnu PG, and found a lot of redundancy. It is enclosed by -----BEGIN PGP PRIVATE KEY BLOCK----- and -----END PGP PRIVATE KEY BLOCK----- ...
3
votes
1answer
94 views

Obfuscate IDS rules

Are there known techniques to obfuscate IDS rules, so they can't be easily used by attackers to reverse-engineer the vulnerability that they detect? Let me provide some context. Sometimes IDS ...
12
votes
4answers
5k views

Processor microcode manipulation to change opcodes?

I had recently thought of an extreme way of implementing security by obscurity and wanted to ask you guys if it's possible. Would a person with no access to special processor documentation be able ...
1
vote
1answer
40 views

Location Obfusication and Email/remote login

Would it be possible for a user of a 3rd party VNC software package and email client to obfusicate/spoof their location, so that an employer would be unable to determine the location from which the ...
3
votes
2answers
465 views

How to Conceal/Detect PGP Symmetric Algorithm Used

When Symmetrically encrypting a file, (not signing, not an asymmetric encryption question), is it possible to conceal the encryption algorithm used, or is it already concealed, but just showing on ...
1
vote
1answer
177 views

Obfuscation alternatives

So I've made a tool for web developers and now I want to sell it, but I don't want all web developers to see my code (PHP). I do know there are PHP Obfuscators, but I don't want to use them, as they ...
26
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2answers
3k views

Break the popularity contest crypto

There is a very interesting puzzle on the Programming Puzzles and Code Golf site to Rearrange pixels in an image so it can't be recognized and then get it back. I understand that this is not ...
1
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1answer
252 views

Obfuscation and Mobile App

Recently, I stumbled with this topic in my mind for few days. I understand that obfuscation is not the best protection against reverse engineering. I wonder if there is another method that make it ...
2
votes
2answers
85 views

Any way to obfuscate *when* two end hosts are communicating?

Whether or not a connection is encrypted, I'm afraid the time an information is sent from one host to another might reveal too much. And I'm literally talking about the time when pieces of information ...
1
vote
0answers
277 views

JPEG file SOS marker before SOF

I'm looking over some JPEG files with an assumption that a steganography has been used for trial obfuscation due to the installation of JPHS. I've come across a file where the start of scan marker ...
0
votes
2answers
652 views

How do you protect strings in code from users decompiling them and seeing them [duplicate]

For an example say we have an application such as a client based application which connects to an API using an api key. We are saying for this purpose there is no OAuth. How would a string or in this ...
0
votes
2answers
81 views

Displaying a video through the web whilst hiding the location

I felt this fit more here than SO, if not, please vote to migrate. We've been approached by a company who would like to use our platform to host their videos. The issue is that right now, we use the ...
0
votes
1answer
128 views

Is it useful to use 'dot' and 'at' in email addresses in documents on the web? [duplicate]

My question seems to be a mash up of two questions. The first is that over at TeX.SE there is a question about creating PDFs with crawler resistant email addresses. There are some good answers about ...
3
votes
1answer
83 views

Are there any fast Homomorphic Obfuscuation techniques available?

Assuming that cryptography falls into one of three areas: Awfully weak protocols and algorithms, that are trivial to break with a low amount of effort and resources Cryptographically strong ...
11
votes
4answers
2k views

Preventing reverse-engineering of client application

I have a web service which is used by a Flash client. Both the service and the Flash client is produced by me (read: my company). The Flash client communicates with the server over HTTPS. One of the ...
2
votes
1answer
232 views

Use of openssl could be a weak point in an Android App?

I'm reviewing an Android app (consists of Java and C source). There are complicated obfuscation steps in the build process (for content protection). But it uses statically linked openssl library ...
4
votes
2answers
1k views

What are the implications of including binary blobs in the Linux kernel?

According to this there are compelling reasons for caution when installing obfuscated binaries. Knowing this, how can running binary blobs as a part of the Linux kernel be acceptable from a security ...
3
votes
3answers
568 views

Need help decoding suspicious Perl .cgi files

I found three (identical) .cgi files in the "cgi-bin" directory of a hacked website account. My knowledge of Perl is insufficient to decode them. I see some regexp with code execution, but I don't see ...
37
votes
15answers
6k views

Should we protect web application source code from being stolen by web hosts through obfuscation?

Is it worth to obfuscate a java web app source code so that the web host cannot make wrong use of the code or even steal your business? If so, how should this be dealt with? How should we obfuscate? ...
43
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3answers
4k views

I found obfuscated code in a comment on my blog. What should I do?

Today I was checking comments on my blog and I found a strange comment, here is the exact text <script>var ...
3
votes
2answers
174 views

Degree of Obfuscation

Let us assume that I have the following code: namespace MobileApp { public class Storage { public Storage() { } public bool Save() { bool ...
3
votes
1answer
617 views

Why does broad based malware use XOR obfuscation?

As per title... The malware can easily be de-obfuscated if it was obfuscated using common and known XOR techniques. Why don't malware authors use any other method that make it much harder to ...
5
votes
1answer
447 views

Is Taking advantage of the IsNumeric() Function In VB.Net Through SQL Injection Possible?

Suppose this is the only mitigation used on a server: Dim IDPerson IDPerson = Request.Querystring("id") If IsNumeric(IDPerson) = True Then IDPerson = IDPerson Else IDPerson = 0 End If IDPerson is ...
4
votes
1answer
751 views

Malicious script analysis

Could somebody tell me what can this malicious code do? I see that in the beginning it turns off the error reporting and logging. Then something with get post method and files stuff. But I am not ...
11
votes
2answers
2k views

What does this injected code do?

One of my sites has just been hacked as this code has been inserted into random(?) files and places within the files. Does anyone understand what it is trying to do? I would welcome anything that may ...
2
votes
1answer
1k views

proxy services for torrents vs encrypting data

I've noticed growing popularity in proxy services for torrent clients; such as BTGuard. Most torrent clients encrypt traffic so aren't these services pointless? I read that it's because the encryption ...
2
votes
1answer
228 views

Lamp server sandbox for testing malicious php script

Fortunately despite recently becoming a full time web developer, security is something I take very seriously. There's a developer that I work with who's system was recently compromised with obfuscated ...
5
votes
2answers
119 views

Is it actually feasible or useful to use a high number of proxy servers?

In the movies, it's not uncommon to see the digitized global map projected on a huge wall with a line of light (presumably a user's connection) travelling back and forth all over the globe in a ...
4
votes
1answer
345 views

Need help on understanding obfuscated code in CVE-2012-4969 exploit

As you may know this vulnerability was found a while ago in the wild and the exploit is available too, btw I'm having problem on understanding the obfuscated code. Is it necessary to use obfuscation ...
9
votes
1answer
1k views

Reversible password storage obfuscation method for third-party login credentials

I have an internal business application, that as part of its functionality connects to a third-party app using login credentials specific to the user of my own app. These passwords are stored in a ...
3
votes
1answer
147 views

How to ensure web application remains secured after intrusion of server

My application employs asymmetric encryption / decryption, the process of how this work is detailed below: Encryption - Server A Data is encrypted using the public key of server B Data is signed ...
6
votes
2answers
2k views

Canonicalization & Output Encoding

I'm reading OWASP's Secure Coding Practices Checklist and under their "Input Validation" section they have an item that reads: If any potentially hazardous characters (<>"'%()&+\\'\") ...
9
votes
1answer
936 views

Why do attackers bother (trivially) obfuscating their source code?

A friend of mine recently discovered and sent me a small collection of trojan php scripts that were uploaded to his machine. Here's an example: ...
4
votes
2answers
345 views

How do I remove or anonymize file names and path that are stored in compiled .NET exe output?

When an exception occurs in a .NET application, the exception output also includes the path and file name of the code file that resided on the developer's machine. This shares some information that ...
4
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4answers
7k views

Reflector - obfuscated code

I run Reflector to de-compile some program and it seems to be obfuscated. I got following output, it’s not very useful. Any ideas how to decompile obfuscated code? [CompilerGenerated] get ...