Defense is the use of security countermeasures to protect the integrity of the information assets in an IT system and/or infrastructure.

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Is it true, that using symetric encryption, if attacker knows encrypted text, original message, and algorithm means he can calculate the secret?

I am a newbie in the security field, so sorry for the naive question. In my understanding, using symetric encryption, if attacker knows encrypted text, original message, and algorithm means he can ...
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1answer
83 views

Defeating ROP attacks in x86

Most defense techniques against ROP revolves around randomization, such as ASLR. If I mark all regions of memory, other than the code segment, non-executable, will this defeat ROP?
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247 views

Letting users pick up where they left off…without logging in (is this bad form?)

I have a Grails app I'm working on that allows users to fill out a fairly lengthy application form. One of the requirements I've been given is to NOT require users to log in or create any sort of ...
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2answers
154 views

As a user, how can I defend myself from disclosed unpatched zero-day vulnerabilities?

In the wake of the Hacking Team breach on July 6th, 2015 [1] [2] I heard that some previously unknown zero-day exploits might surface (apparently one for Flash already has). Once these exploits ...
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3answers
546 views

OWASP escaping recommendation - why /?

In OWASP recommendations regarding escaping untrusted input for HTML element content, they list the following: & --> &amp; < --> &lt; > --> &gt; " --> &quot; ' ...
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336 views

Can TLS Compression be enabled on 3rd party CDN sites that have no authentication?

In this answer, @Thomas Pornin talks about remediating the CRIME attack and says: (It is a shame to have to remove SSL compression, because it is very useful to lower bandwidth requirements, ...
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51 views

In house mitigation for a volumetric DDoS attack

Can a volumetric DDoS attack be mitigated by some in house defense or does the defense always need to be on the cloud? If yes, then why?
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4answers
362 views

How effective are password checking websites? [duplicate]

I typed the following password in howsecureismypassword.net: yummy candy yummy It said it would take 100 billion years for a personal computer to crack. Is this accurate? Even though it has English ...
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97 views

Difference between secure design patterns and a generic coding guidline?

Is there a difference between secure design patterns and a generic coding guideline from which you can derive a technology specific coding guidline? Patterns like "authentication", "secure sessions" ...
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1answer
698 views

Do non-browser clients work around Gmail's 2-factor authentication?

If you use a client like mutt to access your mail, you probably know that it doesn't support 2-factor authentication. It still prompts only for a password - either your account password or, in the ...
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2answers
181 views

Should a 2FA recovery key be stored along with a password?

Many websites give you a recovery key or a list of recovery codes that can be used in place of 2FA tokens if you lose your phone or can't access your token generator. What are the recommended ...
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201 views

A way to secure hyperlinks on websites

How do you think could we secure hyperlinks pasted by users on website's forums, comments, blogs against bad links/leading to malware etc.? I thought about google safe browsing, projecthoneypot. Did ...
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118 views

What is pseudo-encryption key vulnerability?

An organization in a related business was recently hacked. The hackers downloaded several GB worth of files with private information and posted it on the Internet. The news article states: “They ...
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136 views

Similar products to MS EMET [closed]

Following the weekend announcement from Microsoft regarding the vulnerability in IE I have been looking at additional security defences for our endpoints. I've read some technical documentation and ...
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1answer
63 views

Practical security for an inexperienced database developer? (HIPAA)

Hopefully my question isn't too unique to be asked here, but I didn't find anything similar after some searching. As a relatively inexperienced developer (only one large project excluding this one ...
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3answers
196 views

How to tell what viruses are covered by your anti-virus software

One of our corporate twitter accounts recently started sending out DMs to its followers. Looking at the content of these it seems we'd become infected with Troj/Mdrop-EML. All computers on our ...
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3answers
153 views

Example of application that doesn't require “strong authentication”

Does anyone have any examples of real-life applications that doesn't require "strong authentication". I am looking specifically for blog posts or even scientific papers that argue that "strong ...
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3answers
130 views

Security of decompression tools

How safe is it to decompress untrusted files with unrar-free? With unzip? I'm using debian jessie. What steps can be taken to minimize the threat while extracting the file's contents?
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1answer
121 views

Defense in depth vs single security architecture

Traditionally, we have been that defense in depth is the best practice approach if we want to secure our premises from security breach. However, I recently read about DoD's Joint information ...
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1answer
458 views

Localhost WebSocket defense

If a malicious application has found its way onto a computer running a localhost only WebSocket server, would it help if the communications used SSL? If so, how could SSL fail if a malicious app ...
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3answers
151 views

Security coding training best approach

To train the development team, there are various options one can take: inhouse presentation with code samples, CBTs so developers do it at their best time, instructor-led courses onsite or inhouse ...
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2answers
439 views

What is the current best practice to secure an executive's laptop?

What is the current best practice to secure an executive's laptop? The exec will be processing highly sensitive documents (high-value bids, merger & acquisition info, technical specs). As such ...
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3answers
175 views

Spoofing random browser information to defend against fingerprinting

Tor goes the way of trying to make everyone look the same to defend against browser fingerprinting. Wouldn't a simple addon that changes/adds as much information as possible randomly in short time ...
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71 views

Violation of security principles?

It's clear that keyless entry fobs, smart entry cards, NFC, etc. are vulnerable to relay attacks. Suppose they were improved by limiting the period of activity, eg let them be active only when they ...
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1answer
116 views

How to prevent browser from rendering malacious content if request or response is hacked

We are currently working on OWASP security fixes and we identified one attack scenario for which we are trying to figure out a possible solution: User hits a valid HTTPRequest to our application. ...
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1answer
260 views

How to deal with misbehaving clients on an authoritative server?

My coworker and I are developing an authoritative server for an MMO. We can't agree on how to handle "misbehaving" clients. Misbehaving, in this case, means clients who send "odd" requests that might ...
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1answer
63 views

Method/program for editing secure files

I'm not entirely sure if this is on-topic for Security.SE, but it doesn't seem entirely off-topic either, so I'll try. :) I keep a couple of (GPG-)encrypted files with more-or-less sensitive ...
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1answer
113 views

Internal network security policy for development environment

What are the best practices for network security for an internal development environment. Besides adhering to updates, antivirus, and firewall. For instance, is it recommended to use an IDS/IPS like ...
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415 views

What are the risks of encrypting a database with a single symmetric key

An application is required to store sensitive data* on each user. Additional columns are added to the database which store cyphertext encrypted on the application server. The algorithm of choice is ...
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1answer
223 views

Using SSH Private keys in Production environment

I have a need to scp a bunch of files from a production box to my development environment. I am a developer and have limited read access to the production machines. Instead of entering password for ...
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1answer
530 views

How ATM Surveillance Camera works? [closed]

I would like to know how the ATM pin hole camera works.Whether the pin hole camera works only once the card is inserted in ATM or during the cash withdrawal or it works always?
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2answers
151 views

Which hard disk encryptions schemes are tied to the original hardware?

When using a laptop, an encrypted HD/SSD can be an important security measure. However, laptops are prone to accidents (fluid spills, dropping on the floor, etc) that may mandate some or all of the ...
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4answers
151 views

Do technical advice sites sometimes link to malware, and if so, how should we properly research errors? [closed]

Suppose you get an error on your PC that shows up randomly, then you do a search on the internet for the error to find out how to fix it. Typically, you will get some sites that offer a solution, but ...
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5answers
364 views

Is there something similar to DNSBL's for protecting against forceful browsing?

I want to protect a couple of Apache webservers against forceful browsing. Lately there have been multiple scans querying for non-existent applications on them like phpMyAdmin, notably known for their ...
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590 views

Application of Bayesian network for Web Application Security

How can a Bayesian network be used to perform attack analysis of web traffic? I read an interesting article on its application. "Web Application Defense with Bayesian Attack Analysis" but I was not ...
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1answer
317 views

Why AJAX is not used to log in?

I'm wondering why AJAX is not used to log in nor register in most of the pages and it's used PHP reloading the whole page. Is it about security, or it's just that it's not practical at all?
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1answer
210 views

What does Bluffdale mean for privacy?

I posted a question related to tracing webserver attacks over here and the responses got me google-ing. My understanding has always been that privacy is dead and that essentially there's always ...
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2answers
106 views

Cheap and efficient strategy to protect against professional attack?

With things like NSA or state sponsored attack, it seems that no one is safe from a technical point of view. Is there any efficient method or strategy to protect against them? My guess is that ...
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4answers
1k views

Is there any defense against Brute-Force done on a local encrypted file?

Let me start off by saying I don't know very much about encryption, hashing, cracking, etc. I'm just a typical computer enthusiasts, programmer and researcher with many questions. So, I've discovered ...
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1answer
183 views

Clarification about the post: Russian hackers use ‘zero-day’ to hack NATO, Ukraine in cyber-spy campaign

I have encountered the following article on Washington post: Russian hackers use ‘zero-day’ to hack NATO, Ukraine in cyber-spy campaign. As always in such kind of articles the publication sounds ...
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2answers
210 views

How to know what personal information companies know about myself

I've been learning about Cyber Security and how to protect myself online after reading some books on the subject and I want to know how much Information i've handed out to companies.
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2k views

Why Qualys SSL Server Test is giving me 80 and not 100 in Key Exchange?

My openssl ciphers -v 'CIPHER' output is the following: ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA ...
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1answer
88 views

Why should we focus on protecting root access on a home computer?

I understand why root access should be protected in general, especially in the context of a server environment. An unknown party can essentially control everything you do on a computer remotely ...
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2answers
120 views

Firewall Security vs Anti-Virus

Overview of my question I want to create a secure Window's system without the use of an Anti-Virus program. Whilst I know there are many on-demand and live-scanning anti-virus programs readily ...
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1answer
58 views

Is a government entity capable of establishing a secure virtual currency system? [closed]

After reading about BitCoins, I can't help but contemplate the idea of the a government withdrawing paper money and bringing all currency transactions digital, via a bitcoin-like method where every ...
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1answer
3k views

Nowadays, what is the difference between Cyber Security and IT Security? [closed]

Lately (and not so lately), you can hear a lot about cyber security. It is really hard to find an official description about this matter so, let's take the ISO 27032 description: "Cybersecurity” ...
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1answer
105 views

Ideal cryptocurrency digital signature

What are the characteristics of the ideal digital signature for cryptocurrency transaction verification? The reason I ask is because this answer about bitcoin signatures describes a potential ...
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2answers
48 views

Dynamic, Randomized Protocols to Deter Attackers

Imagine a protocol that changed periodically. What if the order of these fields were changed a lot? One point in time the protocol might be { Payload, Checksum, Length, Flags, ID } The next point ...
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1answer
44 views

CSRF Prvention Token Mechanism: Back button Navigation

I have a legacy web application and need to prevent it from CSRF. I tried to resolve the issue without compromising application functionality and got issues related to navigation. The main concern ...
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340 views

List of social engineering hacks and defenses [closed]

Sorry if this question is absolutely stupid or irrelevant, but I can't help but ask. I am just curious about different approaches hackers take in social engineering attacks, and clever examples of ...