4
votes
1answer
241 views

Google Authenticator Error on Reboot

I have set up an SSH server to accept only login using codes generated by Google Authenticator (I have disabled all other forms of authentication on that port). After having rebooted my remote machine,...
0
votes
1answer
361 views

Using a virtual machine for increased layer of privacy (w/ tor)?

One of my friends told me that running tor in a virtual machine Linux and then passing it through a proxy on the underlying Windows would provide in his words great security. Is this true?
1
vote
2answers
2k views

How do I generate a word list from a known seed word? [duplicate]

I've lost my master password. Not all is lost as I know the original word that generated the password: It was generated by a random case switching for consonants and random vocal to numbers. For ...
6
votes
4answers
2k views

Why do you need a 4096-bit DSA Key when AES is only 256-bits?

This is something which I have been wondering and trying to find an answer for, but yet to come even remotely to one. Why do you need a 4096-bit DSA/El-Gamal key when AES uses only 256-bit keys?
31
votes
3answers
14k views

How do you stop a hacker when their IP address is 0.0.0.0?

Wordfence reports the following visitor: An unknown location at IP 0.0.0.0 visited 4 hours 45 mins ago IP: 0.0.0.0 Browser: Baiduspider version 2.0 Mozilla/5.0 (compatible; Baiduspider/2.0; +http:/...
1
vote
2answers
4k views

Which browsers are using openssl

It is asked in stackoverflow, but I suppose maybe it is more suitable to ask here. It is said that openssl are widely used, however, as far as I know, the most popular browsers seem not use openssl, ...
2
votes
4answers
2k views

How to block web-sites from viewing browsing history within firefox?

How can I block websites in Firefox from viewing my browsing history within my browser cache? For example; I've done some Google searches that Amazon is now starting to use to target advertise; the ...
0
votes
1answer
61 views

What files would I be able to view as localhost?

If I was able to view any page on a website as localhost using SSRF, what files should I check for? I checked to see if I could view robots.txt normally, and I couldn't, but using SSRF, I was able to. ...
1
vote
1answer
234 views

Should HMAC key be changed regularly? Should it be kept secret at all times?

I am doing an HMAC of some cipher-text, IV and encryption algorithm. Right now I am using a hard-coded key that is known to both sender and receiver. I was wondering if the key should be changed once ...
11
votes
1answer
384 views

Recommended operational security for generating one's primary key pair?

I have been looking for an operational security guide for generating one's asymmetric key pair for (Open)PGP. I have found plenty of technical guides for how to use GnuPG to generate RSA key-pairs, ...
1
vote
1answer
373 views

How to prevent XSS when transferring web page content within XML

I have an ASP.NET web application which uses HTTPS and XML based request-response. It seems a user's session cookie can be retrieved via XSS, if the request/response is intercepted and malicious ...
0
votes
2answers
905 views

When I reset my password for my Microsoft account, how do they know what password I've used before?

Assumption used: all password that I've used have been salted with some random elements before hashed and stored somewhere in their database. If my previous password exists only as salted-hashes in ...
4
votes
1answer
341 views

Tor and (SSL) response

I have two questions regarding Tor (onion routing). How do I receive responds from a server when I use onion routing, I've read that, the last node(exit node) will use the same path I used but in the ...
4
votes
4answers
488 views

What's the need of multiple implementations of SSL/TLS? [closed]

I've been reading about SSL/TLS and I was surprised when I saw the amount SSL/TLS implementations that exist. wikipedia. So, is there really a need for all these different implementations? Wouldn't ...
2
votes
2answers
2k views

XSS in HTML meta tag

There is a web application which contains a search function. When I search for aaaaaaaaxss I get this: <meta property="the:property" content="100 Results for aaaaaaaaxss (Page 1)" /> It strips ...
3
votes
2answers
345 views

Implementing Own TLS mechanism

I wish to implement SSL/TLS for my site. How can I do this on my own without using a certificate authority. The site will be accessed only via certain machines so I can easily install the public ...
18
votes
2answers
17k views

Can I add a password to an existing private key?

Say I have previously created a private/public key combination, and decided at the time to not protect the private key with a password. If I later decide to "beef up" security and use a password-...
1
vote
1answer
1k views

Multiple people have the same iPhone IP address

I am an admin of an immigration forum. Security is my job One and protecting our members's info is my highest priority. Recently, I discover that there are 3 members who have posted from the same IP ...
9
votes
1answer
253 views

Physical security - responsible disclosure

I recently discovered a way to bypass a commonly used security seal system, requiring no special equipment and taking only a matter of seconds. I feel obliged to disclose this, so as to avoid the ...
0
votes
2answers
220 views

Nmap reporting the status of a port as both opened and closed

If I do not define any range (or if the range is large like a hundreds of ports), Nmap is returning ports as opened. However, if I put a smaller range or just scan a specific port, it says it's closed....
1
vote
1answer
110 views

What can entreprise admins do with our secured sessions?

The enterprise where I work has a proxy server that traces and filters our web activities. Employees claim that they can know the links that we visited and see the content of HTTP web sites, but they ...
0
votes
2answers
682 views

How does the TCP/IP lack security? [closed]

I already know that some concerns of lack of security in TCP/IP are that TCP/IP does not support strong authentication of packets and no encryption of packets. What other weaknesses are there in the ...
2
votes
3answers
1k views

How to prevent attacks to server

I have 3 CentOS server configured for my applications. Recently I recognized that there is so many attacks to my servers. I have so many logs about attempt to login to my servers using sshd from ...
6
votes
1answer
874 views

What's keeping a malicious man in the middle server from forging a valid certificate

According to process of authenticating a server certificate: What's keeping a malicious server to fill up a valid server certificate since it knows all the things: Forged Server public key (man ...
2
votes
1answer
116 views

Why is it dangerous for attackers to be able to enumerate all subdomains of a given domain?

While it seems like a bad idea for attackers to be able to use DNSSEC to enumerate subdomains, I cannot think of a specific attack that this information enables, which would not be doable without this ...
1
vote
1answer
451 views

Is this slowloris attack or not?

IP is hidden in apache log for privacy, except last octet. /billing is our application start page. But it doesn't make sense that it sends POST requests, and get 500 response. Or maybe this is ...
1
vote
1answer
133 views

Should statically-linked server binaries (daemons) be deemed more secure? [closed]

For a long time I've pondered this question. I am aware of the benefits and downsides of dynamic libraries (shared objects), including the infamous article by Drepper. All other things being equal, ...
3
votes
1answer
489 views

Flood of email messages from @attacker.com

I've been getting the weirdest email messages for the last 2 days on my personal gmail inbox. On May 28th, exactly at 4:33 pm BRST I got about 2,000 emails that look exactly the same, here's the ...
11
votes
2answers
2k views

Snowden: “The NSA can remotely turn on your iPhone.”

Watching the Snowden interview last night, Brian Williams asks him what degree of control the NSA has over smartphones -- in particular, whether or not they can remotely turn them on in order to ...
10
votes
3answers
294 views

What is a good source for hardened base configurations

I attended B-Sides in Orlando FL where one of the speakers had mentioned a site which contains hardened configs for popular services such as apache and postfix. The author of these configs is ...
1
vote
1answer
2k views

Can a website download malicious content to my Windows computer without my permission or awarness? [duplicate]

Question Standard security advice is: Only download files from websites that you trust. http://windows.microsoft.com/en-ca/windows/downloading-files-internet-faq This implies that 1. we are ...
16
votes
1answer
4k views

What is the problem with TrueCrypt? [duplicate]

Since a few days, the Sourceforge project page of TrueCrypt is displaying a message saying: WARNING: Using TrueCrypt is not secure as it may contain unfixed security issues And, the authors are ...
5
votes
2answers
771 views

XSS in HTML title tag without forward slash

I am trying to find out whether this is vulnerable against XSS: I can control the content of the title tag through the URL. This would make the site vulnerable if it wasn't for the fact that the site ...
2
votes
1answer
379 views

Should a space in a password count as a symbol when checking for complexity?

There is no doubt in my mind that spaces should be allowed in passwords. I see some websites disallow spaces, symbols in passwords and even enforce minimum length which seems t otally nonsensical to ...
1
vote
1answer
546 views

What encryption does Apple use?

With their iOS devices, Apple allows people to block certain applications through "Restrictions". I recently had an issue with my iPhone where I'm positive that I entered the correct passcode on my ...
3
votes
1answer
2k views

HMAC secret key client storage

I've read numerous articles about using HMAC and the secret key for client authentication in a RESTful client (Javascript) application today. Still, I don't find a single source that is able to ...
-1
votes
2answers
84 views

Intrusion detection system and firewalling

I have a website and hosted some data and MySQL files on it. Is it possible for me to install an intrusion detection system on it, or can IDSs only be installed on my internal network where I have a ...
3
votes
2answers
364 views

How can I separate two OS's files with encryption without using TrueCrypt?

I want to create a dual-boot such that the content of each OS is separated from the other using encryption. The main point point would be to to test out potentially harmful software on one OS, and ...
8
votes
1answer
9k views

Why is it considered safe for services like Mint to store bank password?

My understanding is that, typically websites are recommended to store only hashes of passwords using one-way cryptographic hash function. This way, there is no way to retrieve the passwords even when ...
2
votes
1answer
1k views

Are there HIPAA requirements to encrypt our database hosted in AWS

I'm developing Medical Billing & EHR Software. On completion we are planning to use AWS for hosting and thus provide SAAS. Do we need to encrypt the MySQL database in order to keep HIPAA ...
2
votes
3answers
2k views

How can I get my SSL certificate signed by an CA for web application that runs on localhost

I have a web application that runs on localhost. I have a self-signed certificate for tomcat configured but when loading the website on firefox, I get a security exception. Can I get a CA to sign my ...
0
votes
1answer
149 views

What companies drive around recording license plates? What do they do this for and on what grounds are they able to do so, legally speaking?

A friend shared a "security service" he just read about. Apparently the product is in beta and can thus be tried by anyone right now. I found it very interesting and surprising. I'm curious to know ...
0
votes
1answer
221 views

Algorithm to Transaction Data Signing

Transaction Data Signing I need an idea to develop a very secure algorithm to authenticate online operations using PHP in the server and an Android app in the user's device. What is the idea? The ...
3
votes
2answers
1k views

Web security - use of cookie in https

I am taking a web security class and was told by the instructor that most of the websites today use https for authentication and then use a cookie (authentication token) in plain text to keep track of ...
4
votes
1answer
265 views

Why are countermeasures against control-flow hijacking attacks mostly implemented in software?

I wonder why countermeasures against code-injection and control-flow hijacking attacks (e.g. stack-based buffer overflows and heap-based buffer overflows) are mostly implemented in software. Examples ...
3
votes
1answer
125 views

Email, Certificates and DANE [closed]

Does DANE offer the ability to provide certificates for services? Or is it just hosts? How does one specify a mail server with DANE? If my email is jd@foo.com but mail.bar.com is the email server, ...
1
vote
1answer
165 views

Storing encryption passphrases in memory in Dalvik?

Given KeePassDroid, I'm considering some of the security implications of accessing KeePass databases on an Android device. In the native applications for Windows, OSX, and Linux, whenever the ...
1
vote
2answers
184 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
91 views

Why are certain languages chosen for security application development over others?

Specifically, why are the most popular attack proxies written in java? Is there any particular security posture to the design of the java language that makes writing tools like these simpler? Easier ...
2
votes
1answer
431 views

Is there more risk in changing administrator password locally vs from a centralized location?

I'm working on a mechanism to better handle group policy passwords in response to MS14-025. We formerly used this mechanism for setting the local admin account passwords on our workstations (primarily ...

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