Authentication - establishing the authenticity of a person or other entity. Not to be confused with authorization - defining access rights to resources.

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3
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2answers
295 views

Password on login idea

In addition to the standard best practices on password logins. Has anyone considered a captcha like system but instead of just typing out what is in the captcha, the captcha will be directions on what ...
0
votes
4answers
98 views

Recommendation for identity system

I want to develop a system, something like a comment system for a website, that ensures I know who is posting comments. The content that is exchanged is not valuable and does not need to be encrypted, ...
2
votes
4answers
253 views

How is security of server's RSA private key is ensured?

We repeatedly hear news of hacking of passwords from PW database (server side) but nothing about hacking of server's RSA private key (not asking regarding finding p and q for a given public modulus ...
0
votes
1answer
64 views

How much security would I lose if I enabled “easy enter” pins on an android device?

There is an option on android devices to unlock when the correct pin/password is entered, but without the user explicitly pressing the "done" or "enter" button. How much security does this remove from ...
0
votes
1answer
52 views

Is there a way to securely lockdown a website to an Iphone?

So with a typical website, perhaps the fastest and most effective (arguably) way to secure the site is to add a simple .htaccess and restrict by ip addresses: .htaccess DENY from ALL ALLOW from ...
0
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0answers
46 views

Federation Service to Azure with users from trusted domain.

I want to set up a website on Azure according to the following requirements and are wondering if it is even possible? As a internal team member, I must be able to login to the site with Windows ...
1
vote
2answers
614 views

When paying online with a credit card, what is “3D authentication” and is it reliable?

I tried making a purchase from http://www.laptop-batteries.ca/ but on the very last step the page reloaded with an error. A representative contacted me asking why I didn't complete the order and I ...
12
votes
3answers
6k views

How does deauthing work in aireplay-ng?

I have a question of how aireplay-ng works when it deauths. I mean, it is really easy to disconnect another client from an AP: you just need to run the deauth command (in aireplay-ng) once, specifying ...
4
votes
2answers
3k views

When do you use OpenID vs. OpenID Connect

Can they be used together? ....or are they two separate protocols that may or may not be useful depending on the context? The reason I ask is because I'm trying to implement the following: User ...
0
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2answers
94 views

Effective Free and Anonymous Web Form Encryption

I've got a website and I would like the users to be able to login securely but I don't want to spend any money on SSL / certificates and I would like to stay anonymous i.e. not give the certificates ...
0
votes
1answer
87 views

SSH and shared secrets

There was a question on a quiz I took, about different authentication methods that SSH uses. The answers were combintions of the following four: username/password public key authentication shared ...
0
votes
2answers
82 views

Access token vs. UserID + access token

My goal is to associate (authenticate) hardware devices to users in the database. The access token is generated via webinterface. It is then entered into the hardware device by the user, and the ...
1
vote
2answers
130 views

Is it possible to restrict email accounts within one computer?

can emails(e.g gmail)can be configured to open-up only in my laptop ,my operating system is windows 8 and is it possible to restrict my gmail account to be opened up only in my computer?Usually we ...
0
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0answers
23 views

How does WebID fit in the SAML picture?

How does WebID fit in the SAML picture? Are they related or completely unrelated? Can they work together? If yes, what are the benefits?
0
votes
2answers
76 views

Legality of cookie(set by other sites) tracking

I have created a website A which asks username & password, there exists another closed source website B which again asks for login credentials. A user uses both these websites .I want to ...
0
votes
2answers
100 views

Open email accounts on public computers

When I use a public computer at a certain location, logging into the workstation and going to a site like gmail.com (to check my email) I find that another user is already logged in. Same happens for ...
-2
votes
1answer
124 views

HTTP status code for successful login [closed]

I have a web application for testing. It has a login page. For unsuccessful login attempts, the developers have made a custom error page so that the response from the web application shows 200 OK, ...
0
votes
0answers
25 views

How to evaluate authentication for a WAP portal?

I am trying to evaluate a security authentication for a WAP portal. The authentication works by asking the customer for his unique MSISDN and then a secret pin code is sms to client. In this is a ...
6
votes
1answer
845 views

What are the differences between the U2F and UAF FIDO authentication standards?

Google recently announced support for Universal 2nd Factor (U2F) authentication in Chrome and started allowing that authentication mechanism to be used for 2-factor authentication across their various ...
37
votes
4answers
8k views

How secure are the FIDO U2F tokens

Google and Yubico just announced the availability of cryptographic security tokens following the FIDO U2F specification. Is this just another 2FA option, or is this significantly better than solutions ...
1
vote
1answer
222 views

Using cookies for cross domain authentication

I have an web app 1 which would do the authentication of the user. After that I want to forward the request to another web app 2. Now web app 1 will generate some hashcode which I can authenticate in ...
4
votes
1answer
125 views

How is a Tor hidden service authenticated based only on trusting the address?

While being fascinated by how it is possible to create hidden services with Tor, there's a few details around the address collision issue I can't seem to wrap my head around. Quote from Hidden ...
1
vote
1answer
220 views

Authenticated Diffie Hellman Key Exchange

It appears that the textbook version of Diffie-Hellman is susceptible to man in the middle attack and the use of digital signatures could prevent this attack from occurring. Digital signatures could ...
4
votes
4answers
440 views

Should both user ID and Password be masked for online banking?

Is there a best practice for security purposes requiring masking of both User ID and Password for online banking? Is there any rationale for or against masking both?
2
votes
1answer
58 views

BTLE pairing: Where does the code come from?

When trying to pair 2 bluetooth LE devices (e.g. 2 iPhones), a popup shows up that requires to input a code displayed on the other device. I am aware of the concept of out-of-band authentication, and ...
0
votes
1answer
141 views

How does the Dell Sonic wall Authentication works?

My College Router has Dell Sonicwall authentication. We will be automatically redirected to the login page. If the username and password is correct a new popup opens showing that user 'x' has logged ...
7
votes
4answers
1k views

How to prove Bob has received Alice message

I have read up on Digital signature and it is stated that it provides non-repudation. Assuming Alice signs the message using her private key and sends it to Bob, Bob can use Alice's public key to ...
0
votes
1answer
69 views

Does encrypting the message protect it against length extension attacks

Assuming the following HMAC is used : HMACK(M) = Hash(K||M) = H which is "secret-prefix" hashed function. M is the plaintext message , K is the secret key used The ciphertext is generated as follow : ...
9
votes
3answers
384 views

Security of pronounceable passwords

Some random password generators support the generation of pronounceable words of any given length n. Assuming that words are derived using 26 lowercase letters, the number of possible words of length ...
1
vote
0answers
45 views

Best way to authenticate for Funding balance with API call [closed]

I have an API call where a user adds to their balance when funds are low. The actual payment is done via Braintree, but I need to allow the user to make that call via their API. What would be a good ...
4
votes
1answer
979 views

Logging out of Basic HTTP Authentication

As seen on https://stackoverflow.com/questions/233507/how-to-log-out-user-from-web-site-using-basic-authentication, there are some interesting ways of logging out a user from Basic HTTP ...
5
votes
2answers
276 views

Using Client-side certificates for Authentication

Why aren't client-side certificates used for Authentication? Then user has to remember only 1 password to unlock his windows account which stores the certificates. I understand that if user access ...
57
votes
6answers
7k views

Four-factor authentication

I'm sure you've all heard of two-factor/multi-factor authentication. Basically it comes down to these factors: Knowledge - something you know (e.g. password, PIN, pattern) Possession - something you ...
56
votes
13answers
8k views

Do we really need a long and complicated password for websites?

Most of websites that handle important information (Gmail, for instance) have some kind of brute force protection. Sometimes if you try more than X times it will lock the account or at least give you ...
6
votes
1answer
455 views

Why should I persist OAuth 2 access tokens along with refresh token

That's something I've came across in a couple articles about OAuth 2: when it comes to persisting refresh tokens to database some authors prefer to store access token as well, or at least mention it ...
2
votes
1answer
112 views

L2TP/IPSec: Mutual authentication BEFORE user can access VPN

I came across a question You are the network administrator for your company. You have deployed Windows Server 2008 on all server computers in your company. You have deployed the Network ...
28
votes
5answers
5k views

Could mint.com be more secure, and if so, how?

After reading a bit about mint.com on the money stack exchange, I wanted to give it a try. But frankly, it scares me a little bit. The site has a bunch of links explaining how they're so secure. I ...
5
votes
2answers
198 views

What are the weaknesses of my authentication scheme?

So, recently, after going through some infosec training (FutureLearn's Introduction to Cyber Security, which I heavily recommend as well-explained newbie material), I decided to take the plunge and ...
2
votes
1answer
94 views

Why are PGP signatures not more widely used as an authentication method?

Example: Bob generates a key pair for this example. Bob registers at example dot com where he provides his public key. When Bob will try to log in, example dot com will ask him to sign a random ...
19
votes
4answers
2k views

Why use a Smartcard for (Two Factor) Auth instead of another medium?

I recently installed Bitlocker on my Windows 8.1 machine, using only a password. I was thinking of getting something other than just a password for my storage drive, something physical, like a USB, SD ...
7
votes
2answers
9k views

Creating user specific authentication methods in SSH

I have configured sshd on an Ubuntu server to use key authentication and it is working fine. I had to disable password authentication for key authentication to work. Server is always accessed via ...
6
votes
1answer
187 views

What to do about “approved” direct banking MITM sites like sofort.com?

Brussels Airlines allows several payment types, only two of which are free: Maestro and Sofort Banking: The second option was new to me, but direct debit is usually a free and practical way to pay: ...
34
votes
2answers
22k views

JSON Web Tokens (JWT) as user identification and authentication tokens

I'm implementing a REST service that requires authentication. I cannot store any per-user state (such as a randomly-generated token) because my service does not have direct access to a database, only ...
2
votes
2answers
365 views

Is it safe to use virtual mobile numbers for verification

Is it safe to use virtual mobile numbers for account verification & authentication for services such as PayPal, Twitter, Gmail, Linkekdin, etc.? And what is the security drawback for this?
4
votes
1answer
248 views

Securing server to server http communication

We are trying to come up with a scheme to secure http communication between our internal servers. Are there any good established schemes out there? The requirements we have are: The clients and ...
2
votes
2answers
113 views

Code Signing Confusion

I usually make free windows applications, now I want to digitally sign them. So users can be sure that its from me. But instead of buying the code signing certificate, I thought I may create my own. ...
4
votes
3answers
485 views

Security for home server, wiki

I recently set up my own home server, running Ubuntu linux. The intent I'm having for this is to have a private wiki for my family, so we can have a place to collect information like phone numbers, ...
0
votes
1answer
127 views

Is a Cloud-Connected Door Lock More Secure Than a Traditional Lock and Key?

Now that app based door lock replacements are getting more popular in the market, I'm wondering what the security risks are and why or why not this is more secure than an old fashioned lock with a ...
1
vote
1answer
64 views

Is selecting trusted computer in 2-step verification less secure?

In using 2-step verification, does selecting 'Trusted Computer' a less secure options? https://support.google.com/accounts/answer/2544838?hl=en If so, is it still a reasonably secure option?
1
vote
1answer
181 views

Chat encryption system avoiding protocol sniffing and then key+decryption replay?

I'm working on a chat system and I want to add it some kind of security (not just HTTPS with SSL since I've read it can be sniffed and decrypted with a few tools). Now, my knowledge in cryptography is ...