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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40 views

How to setup cronjobs that do scp without saving the .pem file on either of the machines

I have the following situation and want to know what are the best practices to do such things without exposing myself to security issues I have two servers both use the same private key for login. ...
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3answers
65 views

Is a console application with NT Authority/System rights dangerous?

A developer managed to open a console application with NT Authority/System rights at the startup screen before logging in. From that command prompt it is possible to execute arbitrary programs like ...
3
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2answers
105 views

Separation of secure login steps

I'm redesigning a login screen for a financial services application. Currently, this requests user ID and password, then (on the same screen) 2 digits from a 6-digit PIN are requested - these 2 digits ...
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0answers
49 views

Persistent login by hashing password hash

It seems that persistent logins are technically the same as storing a password on the client, and therefore should be avoided whenever possible. However, real life users would be unhappy with having ...
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0answers
45 views

Is the digital declaration just an obscure proposal?

One professor from my university proposed me and some colleagues to work on a paper about the digital declaration (which is supposed to be better than the digital signature) for passing the subject. ...
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1answer
81 views

Passwordless login over email - security considerations

I'm proposing the use of a login system that sends a one-time login token (with high entropy) via email to the user. After using the token, the user receives another token via email and the previous ...
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2answers
58 views

Logging in after password reset email sent (but not acted on)

Should a user be allowed to request a password reset email and then log in (i.e. disregarding the reset email and using their existing password) or should the current account be locked until the ...
2
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0answers
50 views

Windows Authentication to protect API

One of my colleagues has a web api call that is checking that the user is logged in and his token matches what is in session (thanks to all of you for your help). Let's say this is layer blue. After ...
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1answer
75 views

Is there any way to restrict multiple access to my server at the same time using one client certificate?

My Server is Windows 2008. Mr. X is accessing my web server using Mr. X's certificate. In that time, an outsider is also trying to access my server using Mr. X's certificate (somehow he got it). Is ...
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0answers
79 views

Yet another newbie security paranoid user authentication [closed]

I am building yet another website which requires user and session authentication. This time I want to be complete security paranoid and actually care if the passwords or sessions are stolen. I have ...
2
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2answers
168 views

What are the benefits to a two-page login system for a webapp?

I have noticed many website going to a two-page (not two-factor) login system - where you enter your username on page 1 and click submit, and then enter your password on page two and click submit. ...
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2answers
86 views

Protecting against/detecting a specific Man in the Middle attack

I'm working on a specific (hypothetical) situation, where I have two client machines attempting to perform a public key exchange, via a server. There's no possibility for a direct connection between ...
3
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2answers
143 views

How does my bank knows my second and forth chars of my password

I see that the new login mechanism used by some banks in UK and also used by visa debit authentication is to ask for three random characters from your password at login (for example second, ninth and ...
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1answer
134 views

why gmail's phone verification code not encrypted

while using google's phone verification code system, i have noticed that google phone verification code is always 6 digits cant it be brute forced for randomly generating the 6 digits?is it there any ...
3
votes
1answer
116 views

Is OAuth always the right choice (and when isn't it)

So I am reluctant to ask too much of a noob question, as this guy aked about a non-standard approach and got down voted a bunch, but here goes. I am creating a mobile application which needs to ...
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4answers
132 views

user authentication my method (reinventing the wheel) is this secure?

I have read many articles advising to use OpenID, including Stack Overflow Q&A, for authentication. Unfortunately I can't use openid because my auth is not based on an email id - it is based on ...
1
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1answer
100 views

What is the difference between claims, attributes, and roles?

Many questions have already been asked about Claims-based authentication and the differences with other approaches: Role-based vs Claims-based Explain claims-based authentication Now, my favorite ...
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1answer
55 views

Social login - authenticate if email exists or create new user

Here's the idea: I have a website where I offer to users to log-in/sign-up via social networks(in this case Facebook and LinkedIn) When a user authenticates with either provider I look-up the users ...
2
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1answer
58 views

Self-encrypting drives, certification for tamper-protection?

Consider a drive with Opal 2.0 support that works with Microsoft Bitlocker's "eDrive" feature. In this case, supposedly, the encryption key never leaves the disk (which might increase security, ...
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0answers
10 views

SSTP data traffic when multiple client approach?

I'm connecting 100 clients through SSTP to a centralized server containing a database. What happens when all clients approaches at same time and how the data traffic is managed in SSTP and how much ...
2
votes
1answer
91 views

2-Factor Auth with SSH

I recently acquired a Synology NAS (DS1513+). I am looking to expose SSH access remotely and to that end would like to harden SSH as much as possible. Is 2 Factor auth possible and if so what are the ...
1
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1answer
67 views

What is the best approach for securing log-in credentials on an HTML form?

I realize how basic this question is, but I have relied for years on mechanisms built into .NET to handle log in for me. These days, most of my work involves using client-side logic and calling API ...
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1answer
32 views

login not working using hash_pbkdf2 [closed]

i am storing the password using hash_pbkdf2 but now ive hit on a problem my code : 1.for register $salt = openssl_random_pseudo_bytes(125);//salt $final_pass = ...
0
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1answer
83 views

Is two phase authentication using SMS/voice dead?

I'm looking at implementing a two-factor authentication system for my web site, utilizing a user's cell phone as the "something you have" part of a two-factor system. It seems like there are two ...
0
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2answers
57 views

A special file as the second factor in 2FA

Can a file e.g. containing some random key that is generated by my web site/app be acceptable as the second factor (the first factor being a normal password) in 2FA? Someone said so to me in the ...
0
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1answer
32 views

How could a comments plugin be securely loaded from domains people are already logged into?

The fundamental idea is to load a blog comments plugin (like Disqus) from a domain someone is already logged into to save users time and increase engagement. I like the facebook comments plugin ...
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1answer
103 views

What good does the Kerberos Authentication Server

I currently try to understand the Kerberos protocol. And I think I understand the parts of it. How Alice gets a ticket from the Authentication Server to authenticate herself to the ticket granting ...
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2answers
42 views

user roles or access levels

I am beginning a new project and I already know that I'll have various roles for various users, regardless of their access level. They just have different jobs to do. With that in mind, I'm thinking ...
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0answers
55 views

How should I authenticate my SPA frontend with my API since I´ve got no authentication process in the site?

We are designing a web site for selling financial products online. The following is a high level description of the components: Our frontend will be a SPA built with AngularJs. The frontend will ...
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0answers
29 views

Use TLS certificate as both server and client?

For a federated server-to-server protocol with domain-based identities, I am thinking of using TLS client certificates as authentication mechanism. I figured that re-using each peer's TLS server ...
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0answers
54 views

Does Diffie-Hellmann (DH) key exchange protocol lower Off-The-Record protocol (OTR) security level?

Off-the-Record protocol employes Diffie-Hellman key exchange protocol (DH). DH protocol does not provide authentication of the communicating parties and, according to many sources, is vulnerable to ...
1
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2answers
148 views

Security of login form

I would like to know how secure is this code I made for a login form... because I'm new in this and have serious doubts. $sql = "SELECT user_name, user_password " ."FROM users " ."WHERE ...
0
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1answer
29 views

Allow access only for some Mac Ids

There is an application which shows a login page. However, I do not want people to login through any machine. I want to restrict login to a few Mac Ids. Is there a way to do this? There is probably a ...
0
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2answers
61 views

How do SSL authenticated users prove authenticity through UDP packets?

I chose SSL for registration in the game client. The client communicates with the game server which stores a salted/hashed password. If I use SSL to authenticate users on login but the game does all ...
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1answer
53 views

automatic connection from LSASS to different IPs. Is this the usual behavior?

I'm using windows 7. firefox 22. connecting through a regular residential wifi router. In the last month I've noticed that when I connect to the internet and once in a while my firewall indicates me ...
0
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1answer
38 views

How do I solve a lot of Failure Audit (529 680) which are appearing in event viewer “Security” tab?

was trying to consume an Web Services that I have published on the Web but I couldn't thing is that when I got into the server and check the "Event Viewer" I have a LOT of "Failure Audit" and they ...
3
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1answer
245 views

Does it make sense to implement OAuth when no 3rd party is involved

I own a REST API at server side and a distinct web application that would call those APIs. I want to secure my APIs calls. After some reading, I want to implement the OAuth 1.0a mechanism at server ...
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0answers
118 views

Want to implement a really good authentication mechanism for REST API

I own a web application (single page application with Angular), that asks for some data through a set of REST APIs based on my server-side application (using Play Framework 2.2.1). So basically, I'm ...
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0answers
146 views

Simple Session Management Across Multiple Application Servers

How should I handle authentication for a simple iPhone chat app? Backend I'm building the backend using two application servers: Sinatra REST Server It lists users & old messages. Node.js ...
2
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1answer
103 views

Facebook iOS SDK Authentication

The Facebook iOS SDK only needs your bundle & app IDs of your iOS app to match those of your Facebook app. If I find out an app's app ID, can't I just create another iOS app with that app's ...
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3answers
88 views

Resetting passwords howto

I am currently in the process of designing a registration form for the users to register accounts. The accounts will contain a lot of personal information, so I want to ensure highest possible ...
1
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1answer
100 views

SAML and kerberos what to use where [closed]

I came across SAML and kerberos, both are used to establish identity using assertions (tickets) so is there an overlap in their use ? Can somebody highlight their differences and point which ...
1
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1answer
99 views

Is authentication through proxy sites safer?

usually in office or wherever whenever we are blocked with gmail and facebook websites,we used to browse the site with the proxy sites,we used to pass our login data through proxy sites,my question is ...
0
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6answers
215 views

Does ISP have control on all routers in their network?

When I was changing my router my ISP technician told me that he has remote access to all routers provided by ISP. Was that true? If that is a fact it scares me...
5
votes
2answers
1k 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 ...
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1answer
41 views

If a site says its API for login can't be made available for “Security Reasons” should I be worried

Stack Exchange API 2.2 is finally out, (Yay!) Reading through the linked blog post, i notice the line: Login methods that don’t use OAuth can’t be made public for security reasons. Is this ...
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0answers
66 views

Is my approach to anonymous certificate based HTTP(s) authentication and secure private messaging sound?

I'm trying to work out a somewhat anonymous secure messaging system, and was hoping someone could validate my overall approach. Keep in mind, this all takes place over HTTPS. Authentication While ...
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1answer
130 views

SSO via HMAC and shared key. Can this be improved?

Given an authenticated user on A.com, we want to redirect the user to B.com so that she'll be immedaitely authenticated. The scheme I'm considering is very basic: A.com and B.com both share key S. ...
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0answers
56 views

how to implement 4-legged authentication for mobile application?

I have a REST web service which already implements oauth authentication mechanism via browser. I would to expose my API to a number of mobile clients programmed by third parties. In this scenario 4 ...
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1answer
130 views

Hash the signing key of an authentication token in database

I have clients which are all browsers. All clients render just a single page application getting data from a Web API. The design of the API follows REST principles. I use token-based authentication ...