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Questions tagged [obscurity]

Security through obscurity means relying on the secrecy of the design of a system to keep it secure. Kerchkoff's principle states that the security of a system should not rely only on obscurity.

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0answers
28 views

What unique device fingerprinting information can an iOS 12 app collect?

As a follow-on to these questions: What unique fingerprinting information can an iOS7 app collect? What unique device fingerprinting information can an iOS8 app collect? What unique device ...
5
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4answers
130 views

What is the use of disabling detailed exception pages on open-sourced apps?

Frameworks for web apps typically can run in either production mode or development mode. One of the major differences between the two modes is how exceptions are handled: in development mode the ...
50
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7answers
11k views

Doesn't the choice of encryption algorithm add entropy by itself?

Let's say someone has my encrypted data and he wants to decrypt it. People always talk about how the length of the key (e.g. 256 bits) decides about the entropy of the encryption, which totally makes ...
3
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4answers
157 views

Does allowing a user to know their own authorized capabilities decrease security?

In a system with a complex set of computed authorizations, does conveniently allowing a given user access to view all of their own authorizations decrease security? In a "Policy as Code" system ...
3
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2answers
122 views

Can a URL that has no links to it be discovered? [duplicate]

Say there is a URL example.com/abunchofrandomsymbols and there are no links to it anywhere on the internet. Could it be discovered somehow? My guess is a browser like Google Chrome could report it to ...
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4answers
244 views

Track who leaks your software

I'm releasing some software in python which is impossible to fully encrypt. I was thinking of changing the variable names slightly for every copy that I release. Is this a good way to figure out who ...
89
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10answers
19k views

Does it improve security to use obscure port numbers?

I recently started a job at a small company where the CTO prefers to host SSH services at obscure, high numbered ports on our servers rather than the well known port 22. His rationale is that "it ...
5
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2answers
249 views

“Security through obscurity” is bad for security systems but good for spam detection. Why?

I was reading a request on meta Stack Exchange: A request for an informative popup before possible serial voting. It received two seemingly well-informed answers from well-informed users, and I've ...
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16answers
23k views

Security BY obscurity is horrible. Is security AND obscurity good?

Normally I preach that rolling your own custom crypto algorithm is a bad idea. But will it really hurt if it's the outermost layer though? Or will it make security worse? AES -> CipherText ->...
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0answers
1k views

What unique device fingerprinting information can an iOS 11 app collect?

As a follow-on to these questions: What unique fingerprinting information can an iOS7 app collect? What unique device fingerprinting information can an iOS8 app collect? What unique device ...
0
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3answers
84 views

Adding false network tools / signatures for malware defense

I was looking into implementing a security measure by adding false analysis tools / signatures on client PC's. The idea is that certain malware would scan the environment for analysis tools, and if ...
1
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2answers
156 views

Is *all* obscurity subject to debate? [duplicate]

I'm a beginner and reading about attitudes towards "security by obscurity." I understand that there are varying degrees of vehemence in the opposition to the use of obscurity, but I am trying to ...
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0answers
81 views

Is it a security risk to send a database primary key to an external system?

I'm registering the devices of my app users with a third-party push notification service. I need to associate each device with its user at the service so that I can target a specific user's devices ...
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1answer
113 views

shared key random number generator with obscuring admin panel

i'm trying to make another security layer above the 2FA layer for super admin panel/login what i have in mind so far is a shared key (shared seed) to generate random guids that is created by client-...
4
votes
1answer
108 views

ASCII to HEX to obscure filenames: Is this common?

I've been learning about ethical hacking, and utilizing the wonderful resources that helpful organization like OWASP and OpenDNS have provided for learning and testing. However, I sometimes come up ...
4
votes
2answers
248 views

during ssh handshaking server introduce itself - does it improve security to change self presentation?

My Archlinux running devices does not present themselves duing ssh handshake: $ telnet 192.168.1.151 11735 Trying 192.168.1.151... Connected to 192.168.1.151. Escape character is '^]'. SSH-2.0-...
3
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3answers
624 views

Does mixing in keystrokes of Backspace, Arrows and Delete add any security to password typing?

It is well known that the analysis of the keyboard sound can reveal/hint at what keys were pressed when a password is typed. One could mix in wrong characters (not belonging to the password) with ...
7
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1answer
1k views

What unique fingerprinting information can an iOS 10 app collect?

As a follow-on to these questions: What unique fingerprinting information can an iOS7 app collect? What unique device fingerprinting information can an iOS8 app collect? What unique device ...
-4
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1answer
497 views

Does combining two encrypted strings secures password? [duplicate]

For example, a person having password 123456. it's MD5 is e10adc3949ba59abbe56e057f20f883e and SHA1 is 7c4a8d09ca3762af61e59520943dc26494f8941b and after joining both hashes. Which comes to be ...
43
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7answers
8k views

Is suggesting a correct url in a 404 page bad practice?

I'm currently writing a web application, and my client asked me if it would be possible to suggest a valid URL to the user when they accidentally write a typo in the URL bar, an example of this would ...
4
votes
1answer
290 views

Increased security from separating username and login name?

I seen this question: Does username length/complexity positively impact security? which got me thinking about usernames/passwords from a developer-aspect. If a developer for an application were to ...
29
votes
7answers
5k views

Does username length/complexity/uniqueness positively impact security?

Is having a longer/more complex username considered more secure than using a shorter/basic one? Would the uniqueness of a username positively impact security? This is assuming that adversaries aren'...
0
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2answers
87 views

Can I safely store my admin scripts in a publicly available script file?

On a project I am working on I have all javascripts mixed together in all.js. I have a separate file, admin.js that contains scripts used on the admin section of the project. This file is only ...
0
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2answers
114 views

Using Two Different Brands of Security Tools To Block Backdoors

There's this idea of using 2 brands of firewalls both inline that is usually brought up: {Internet}<-->FW(A)<-->FW(B)<-->{Internal Network} Or using 2 algorithms: {Plain ...
109
votes
8answers
20k views

My school wants to keep the details of our door authentication system a secret. Is that a good idea?

So, I am designing a door authentication system (can't really go into more detail) for our school, so that only authenticated persons can go through a certain internal door. They hold that its inner ...
8
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3answers
962 views

Risk of running services on ports >1024

In a Reddit thread on securing SSH access to a Raspberry Pi, one commenter recommended running SSH on a non-standard port of 8123. Another commenter had this to say on the matter: Don't change ...
5
votes
1answer
177 views

Is reskinning work computer desktops a practical security measure?

Recently, I opened a new checking account a national US bank. The branch of this bank was very modern, and they even had a wall of screens behind the teller's desk. When I was meeting with an advisor ...
89
votes
15answers
20k views

How to store passwords written on a physical notebook?

Answers to the question "How safe are password managers like LastPass?" suggest that storing personal passwords on a physical notebook might be a reasonable option: I know someone who won't use ...
2
votes
2answers
137 views

Are there any security benefits in deleting the private key of a https webserver after starting it?

Say you have a web server offering pages via HTTPS. After the process begins running, if you were to delete the private key, would this prevent private key recovery in case of server compromise? ...
8
votes
1answer
1k views

Database table name prefixes and security by obscurity

One of the most common pieces of advice with respect to securing WordPress, Magento, and other widely-used pieces of software is to add a prefix to database table names or change the default prefix. ...
1
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0answers
951 views

What are the best ways for an iOS 9 user to protect against device fingerprinting?

In response to this series of questions: What unique device fingerprinting information can an iOS9 app collect? and as an update to this question: What are the best practices for maintaining privacy ...
8
votes
1answer
1k views

What unique device fingerprinting information can an iOS9 app collect?

As a follow-on to these questions: What unique fingerprinting information can an iOS7 app collect? What unique device fingerprinting information can an iOS8 app collect? Apple has apparently ...
9
votes
1answer
247 views

Do large online software companies limit employee access to company information?

I've been wondering about how large online software companies, specifically those based around a single massive product, like Google, Facebook, Yahoo, etc. handle the risk of terminated employees. Any ...
19
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1answer
4k views

Use of obscure URL for security [duplicate]

My hosting provider is offering an infrastructure-as-a-service (IaaS) product administered via a web interface, where the administrator can create and destroy virtual machines. To access the web-...
10
votes
6answers
4k views

Why do we keep our keys secret, rather than our algorithms? [duplicate]

On almost any website that relates information about cryptography in general there is this common notion that almost all encryption/decryption algorithms should use a key as one of their inputs. The ...
26
votes
5answers
3k views

Why do “Forgotten Password?” links generally reveal usernames or registered email addresses? [duplicate]

It seems that most sites or systems will just state Invalid username or password As a means to not reveal usernames for use in brute force (and other) attacks. Seems like a good idea as a ...
48
votes
6answers
6k views

Is a website published in an obscure directory comparably secure to being placed behind a login? [duplicate]

Let's say I create a microsite for a client that contains confidential business information. We need to place this in a location the client can access, in order for them to approve for launch. If we ...
3
votes
2answers
95 views

Is hashing schema information for client when generating SQL queries more secure?

I'm planning to implement a web system wherein APIs and presentation for CRUD in data tables are automatically generated, like that in phpMyAdmin. How I plan to implement this is to construct SQL ...
1
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0answers
173 views

Airgapped network security: feasable to prevent precompiled code from running to limit vulnerability to hacked firmware?

I'm not sure if this is the right medium to ask this but I'm looking for pointers or if this is being done. I realize that this is still a bit of a open question. When internal network holds critical ...
9
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3answers
6k views

Session Hijacking through sessionId brute-forcing possible?

cookies usually contain a sessionId to keep track of a logged user. What would prevent a malicious user to forge millions of requests with random sessionIds and send them to a server, hoping to ...
0
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2answers
190 views

How much do unusual characters in passwords help?

If I use a system that allows all Unicode characters or a similarly large space for passwords, how much would using an unusual character help in practice (for example, ࡀ ,which I found under Mandaic ...
2
votes
1answer
406 views

Security of mainframes?

I am very intrigued as to how mainframes seem to be much more secure than the servers. Malware targeted are mainframes are very rare. It is due to security through obscurity? Since few people have ...
1
vote
2answers
281 views

Prevent logging in by pressing Enter - security by obscurity?

An online banking site which I use, has a "feature" which disallows a user from pressing Enter to submit a login form. For example, if you have typed your username in the Username field, pressing ...
20
votes
5answers
3k views

Why is security through obscurity not a good option for encryption? [duplicate]

I feel like there must be a simple explanation, but I've been looking around haven't found any wholesome answers. Take for example my name is Alice and my best friend Bob and we want to communicate ...
2
votes
2answers
651 views

Teamviewer Security Question [closed]

Currently we are using Teamviewer 9. We have a couple of desktop machines that are locked down in the following manner: 1). The shell is no longer explorer.exe, it is a custom program we have ...
0
votes
1answer
857 views

Detect referer check on redirect

I have a section of my web site that I only want reachable from another portion of my web site. I know that referer spoofing is trivially easy. But, if all requests from an incorrect referrer are met ...
10
votes
1answer
918 views

What unique fingerprinting information can an iOS7 app collect?

I'm interested in unique information that is beyond typical user knowledge or control. As of iOS 7, users can easily protect local physical tracking by controlling radios (cell, WiFi, Bluetooth) in ...
3
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3answers
7k views

Purpose of using base64 encoded urls

I have come across a website, freshbooks.com, which uses base64 encoded urls for all purposes, ranging from POSTing sensitive data to a URI or just viewing some resource. For instance, a url to view ...
1
vote
1answer
725 views

What is the best practice to save encryption and decryption method in an application?

Almost all the application regardless of their nature and purpose are using encryption to secure sensitive data to be saved to database, if the user using a method to encrypt a file (for instance an ...
43
votes
11answers
7k views

Isn't all security “through obscurity”?

I know that one shouldn't rely on "obscurity" for their security. For example, choosing a non-standard port is not really security, but it also doesn't usually hurt to do so (and may help mitigate ...