3
votes
4answers
150 views

Record IP pseudonymously?

I'd like to be able to ban an IP from my website, but for privacy reasons I would like to not have a record of the IP itself. Hashing the IP would allow for the hash to be brute forced in mere ...
4
votes
2answers
296 views

What happens if my ISP gives me an IP address that's already being used [closed]

Like the title says, what happens if my ISP gives my connection (by accident/on purpose) a public IP address that someone else is currently using to browse the web or send an email or pay his bills? ...
4
votes
2answers
796 views

How can NSA implants and backdoors be detected? [closed]

It has been a while now since the Snowden revelations of various NSA malware and backdoors. For instance: March 12, 2014: NSA has developed implants to take over targeted computers’ microphones ...
0
votes
1answer
114 views

In IKE protocol; what is the PRF? [duplicate]

In IKE protocol; what is the PRF ? What is "the generation of a key based on modeled random oracle hash functions"?
3
votes
1answer
167 views

How does “Google password monitoring” work?

Google Apps has a feature to monitor users' password strength and notify administrator about it. Google help says: View the length of each user's password along with a graph showing its relative ...
1
vote
1answer
36 views

make specially encoded template available for file uploads

A comment to this blog post at sans.org about secure file uploads suggests making a pre-formatted template available for users when they need to do file uploads. The user would use the template to ...
2
votes
1answer
254 views

PRF, IKE and hash function

The term PRF is mentioned in the documentation of the IKE (Internet Key Exchange) protocol. What is a PRF? What is the difference between a PRF and a hash function? What PRFs are used in the IKE ...
3
votes
2answers
270 views

On an “uncritical” site, is there any reason to NOT trust a self-signed certificate?

There are many sites that have self-signed ("untrusted" in Firefox) certificates. I then have the option to trust them or not. If I not trust them I can either leave the site or only visit the site ...
3
votes
1answer
496 views

How do OTP USB sticks work?

I just discovered the YubiKey NEO which seems like a pretty awesome device for maintaining security for a variety of different things including computer login, SSH private keys, GPG private keys, and ...
80
votes
7answers
11k views

Why do I hear about so many Java insecurities? Are other languages more secure?

I really like the Java programming language, but I continuously hear about how insecure it is. Googling 'java insecure' or 'java vulnerabilities' brings up multiple articles talking about why you ...
0
votes
1answer
249 views

How to set correctly set Local Host on a payload for a user outside subnet?

I'm training with labs and metasploit and there's some payloads I can send to my target and exploit it(in my subnet). If I have to exploit a payload I sent to a target outside my network which options ...
1
vote
0answers
40 views

where to find a detailed demonstration on how to imitate the Token Kidnapping exploit by Argeniss?

I am looking for a way to do the Token Kidnapping’s Revenge exploit by Argeniss. (The vulnerability is explained in here) I am studying security (beginner) and I would like to imitate the attack to ...
1
vote
0answers
126 views

Reverse proxy which only proxies published query strings?

I'm setting up a reverse proxy to limit access to a protected resource. The protected resource provides a status page (http://protected.local/info). That page contains a number of links with query ...
7
votes
2answers
557 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 ...
1
vote
0answers
95 views

Passing Encryption Key Across Session for Symmetrically-Encrypted DB

I'm building a database that symmetrically encrypts user data. Nothing super sensitive, I'd use a third-party if it was. The data is encrypted with a surrogate key; the user must enter a password to ...
0
votes
1answer
186 views

Does the use of plugin-id make the nessus scan intrusive in some way?

I want to know when scanning using NESSUS, though it is said its non-intrusive by default But what I want to know is how the use / definition or the testing conditions mentioned in the plugin-id ...
1
vote
2answers
842 views

Could “receive SMS online” site be a scam?

There is a site that allows you to see all SMS received by a certain set of phone numbers (owned by the site). This seems to be meant for services that require two-factor authentication using SMS, ...
1
vote
1answer
220 views

Can I show PCI compliant Logo

I have just now got 20 of my e-commerce websites scanned and certified by Comodo. I will be submitting them to my banks as well to prove that I am PCI compliant. But is there any regulation on who ...
1
vote
1answer
333 views

Content sniffing XSS vulnerable browsers

In order to prevent Cross-site scripting (XSS) in a private web application that supports image upload, I intend to reject browsers that are vulnerable to content sniffing. Which browsers are ...
0
votes
2answers
157 views

Can running a script while logged in compromise my facebook password?

In websites related to facebook malware analysis and information, we often see messages to the effect of if you have run this facebook app then your account has been compromised, or if you went to ...
9
votes
5answers
1k views

Ads appearing in our application when they should not be

I received a strange issue reported by one of my web application users. Apparently they are getting "ads" within the browser window when using my application. I didn't add advertisements at all. It's ...
-1
votes
3answers
377 views

Is there a safe way to open a possibly spam facebook attachment?

I got a spam attachment from two of my facebook friends I know it is spam because of the nature of the content I also know that these aren't the type of people to send such a message to me ...
0
votes
1answer
148 views

How do I determine the algorithm used on an encrypted string? [duplicate]

I have a Microsoft Access database which contains encrypted data: When I copy-paste it, it looks like $ 8F). How can I determine the used encryption algorithm? How can I convert this to readable ...
6
votes
1answer
723 views

What can happen if someone gets a hold of a scan of someone else's passport?

Or: "Do I need to be concerned about emailing people scans of my passport if they want to verify my identity?" Is there anything anyone can do with the information on the main page of the passport ...
2
votes
4answers
176 views

Intrusion detection architecture

I want to propose an architecture of intrusion detection on the schema shown below. Should I place one IDS in front of each server, or would one be sufficient for all the servers?
1
vote
2answers
425 views

Determining the accuracy of a biometric system

How is the accuracy of a biometric security system (its ability to minimize false acceptance rate and false rejection rate) determined?
3
votes
1answer
823 views

iPhone iOS 7 Encryption at Lock Screen

Following this topic, I have a question about how the OS and apps access data while the phone is locked. Particularly in the case of iPhone 5S running iOS 7. When the device is locked, what allows ...
18
votes
5answers
4k 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 ...
0
votes
1answer
164 views

Secure distributed storing and querying of [medical] data?

Comparing ways of distributing and securely storing and querying structured and schemaless data. Currently I am using MongoDB, but am looking into (Postgres|MySQL)&CryptDB, Cassandra and others. ...
8
votes
5answers
9k views

Can the recipient of my emails know my IP address?

When I send out emails using gmail, is my IP address being recorded? can the recipient of my gmail message knows my IP address and thus infer where I am located?
0
votes
2answers
263 views

Ubuntu LVM LUKS Encryption

I've been reading about Ubuntu LVM Encryption, and I understand that it supports the use of Linux Unified Key Setup (LUKS) during installation, which is a block level encryption that encrypts the ...
1
vote
1answer
45 views

How to keep important data secure in case of total compromise?

The question is simple, and really interesting at the same time. How would you keep your data secure in case of a total compromise of your infrastructure? This should NEVER happen, but as we all ...
-1
votes
2answers
732 views

Can NSA generate all hashes for rainbow table to break md5?

I was wondering about md5 encryption. It is good, and I agree that it is unbreakable. But this is why we have rainbow tables. What if bunch of people gather together and start brute forcing and ...
3
votes
2answers
445 views

How to securely use Process.Start?

I am using Process.Start in a Windows Service I created to execute an exe that I have on my server that is used for audio conversion. I am passing some user input as a parameter to this exe. The ...
3
votes
2answers
2k views

Is it a good idea to store Email addresses as hash only?

I am currently building a web service at http://write-math.com similar to http://detexify.kirelabs.org/ that should help users to get LaTeX code from drawn formulae. It is part of my bachelors thesis ...
3
votes
1answer
301 views

Can I perform WEP cracking from several laptops against 1 AP

I have successfully being able to perform WEP key cracking attack using aircrack tool. I want to allow my students to test this in a lab environment. They will be working fro their own laptops against ...
1
vote
2answers
82 views

Symmetry meaning in cryptographic algorithms

When we refer to symmetry in cryptographic algorithms such as symmetric or assymetric does the symmetry refers only to the equality or not of the keys, or does it also refer to the symmetry of ...
0
votes
3answers
55 views

Restrict access to admin area by checking SSH connections

Assuming that the users have dynamic IPs (so I can't whitelist) and that setting up a VPN is not an option, is it a valid approach to restrict access to an administration area by only allowing IPs ...
3
votes
1answer
179 views

How fast can a MD5 collision be found

If I have a salt of 16bytes and 16bytes of data, how fast can one find another 16bytes of data so that MD5(salt + data) == MD5(salt + other data)? I don't expect an answer accurate to the nanosecond, ...
0
votes
2answers
99 views

How to handle data-dependent Claims?

This question is about Claims-Based Authorization and Windows Identity Foundation (unfortunately I lack the priviledge to create a tag for this). Consider the following simple use case: I have a ...
2
votes
1answer
2k views

Why do I need to install the startcom intermediate certificate?

I issued my server a Startcom class 1 cert. With no changes on the client, I can access this server via FF without issue. However, when try to validate the certificate via openssl s_client it chokes ...
1
vote
3answers
89 views

Is it ok to use the same password for many services with two-factor authentication?

Let's say that I've a relatively strong password, but I don't want to use many different passwords for each different service, and let's say that those services provide two-factor authentication using ...
3
votes
2answers
362 views

Is AES encryption vulnerable?

I was reading weaknesses in AES encryption. Unfortunately, I have a website that uses AES: Its database is almost entirely AES encrypted. Is there a real threat? Would it be worth to refactor the web ...
0
votes
3answers
157 views

Simple explanation of Port Knocking

I was just referring to this article: http://en.wikipedia.org/wiki/Port_knocking The term Port Knocking, as explained here, was slightly confusing and I was feeling difficulty in getting the hang of ...
2
votes
1answer
76 views

How does checking CRLs make sites less safe?

With the frantic certificate upheaval resulting from the Heartbleed fiasco [drink!], there has been lots of talk regarding certificate revocation, and in particular the policy of certificate ...
1
vote
2answers
1k views

Is cross site scripting possible with the img alt attribute?

My question is, if any characters are allowed in the alt attribute of an img tag (except for double quotes), is XSS possible? Valid image or not.
1
vote
1answer
201 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 ...
0
votes
0answers
54 views

Changing the string format of Burp generated certificates

The certificate verification in a piece of software I'm poking uses UTF-8 encoded strings to verify the certificate's host name. Certificates generated by Burp suite, however, use the custom type ...
0
votes
2answers
166 views

Asymmetric Data Storage+ No-Hash Password Storage?

Edit: removed a part of the original question; I'll break it down in a different post. I am following @Polynomial's answer to store information in a database. Here are my requirements: Only the ...
0
votes
2answers
193 views

Asymmetric vs Symmetric Encryption Benchmarks

I have found these benchmarks in Crypto++'s site. http://www.cryptopp.com/benchmarks.html But I am, quite honestly, not entirely sure how to interpret them. I am really looking for a set of ...

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