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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Authentication between to devices where the same password is used on both

I'm writing two applications that are intended for execution on two separate devices. It is similar to a remote desktop solution such as TeamViewer. What follows below is my proposal for an ...
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0answers
52 views

SSO implementation in a mobile application

We are currently in the process of implementing SSO for one of our enterprise client in our mobile application. To make it more user friendly we were considering the idea of adding a new endpoint to ...
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4answers
6k views

How to protect against login CSRF?

http://seclab.stanford.edu/websec/csrf/csrf.pdf points out that most CSRF protection mechanisms fail to protect login forms. As http://stackoverflow.com/a/15350123/14731 explains: The ...
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0answers
173 views

JWT for User Authentication + Client App Authentication + User Claims Holder?

I would like to switch the security layer of my API from Basic Auth over HTTPS + claims-based infrastructure (w/ claims populated in a delegatinghandler) to a more robust mechanism and support client ...
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2answers
40k 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
113 views

JWT for email validation of an account

I am thinking of using the this registration flow for my site: 1) User registers by entering email and password. 2) Enter the email and hashed password into my database 3) I then construct an ...
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5answers
7k views

Two-factor authentication w/certificate and username & password?

Example scenario: ActiveSync Authentication method: certificate-based authentication AND Active Directory domain username-password Encrypted on device: public & private key AD username ...
2
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0answers
107 views

Can a service provider communicate directly with an identity provider?

I'm making an authentication server that will act as an identity provider for my service. Looking at the typical SAML use case, the service provider will redirect the principal to the identity ...
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2answers
66 views

Is there a PKCS certificate format that signs ASCII data?

Is there a PKCS #x already out there that was designed to sign ASCII data and protect it from manipulation? I was originally guided to PKCS #7, but based on posts here it looks like the data is not ...
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3answers
800 views

Is it secure not to have csrf protection in login forms?

I have noticed that WordPress doesn't have csrf protection for their admin panel login /wp-admin/. Does it actually posses any potential risk? Is there any possible ways there an attacker could ...
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1answer
72 views

How to authenticate users?

I'm in the scenario that I'm planning a detailed description on "how to securely encrypt files" without putting too much in one Q/A. So, in a file-encryption scenario, what are the possible ways to ...
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1answer
218 views

Login from a desktop application to a web application

I have a desktop application and a web application. The user is loged in on the desktop application. With a click on a button or something the browser should open and the user should be logged in. ...
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2answers
54 views

Does using a token and a pin for logging into a corporate internal system removes the need for using regular user names and passwords?

I am evaluating an internal 2 factor authentication implementation in an organization. The system designer wants to remove regular user names and passwords from all user workstations such that each ...
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1answer
2k views

Is my JWT refresh plan secure?

I plan on using JWT for my login system for mobile devices. There is no real standard workflow for refreshing JWT tokens I could find so I created this one below. The reason I want to use JWT is for ...
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3answers
761 views

Is Twitter digits login (sms auth code) insecure?

Twitter released(some time ago) a new kit named Digits which allows the client to login with a phone number and an authorization code (received through sms). I find it great for the user experience ...
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3answers
4k views

Login required before SQLmap

I have a multipart form data where I am suspecting one of the multipart form fields (parameter named htmlbevt_id), to be vulnerable to SQLi. To test for the same I captured the request using Burp and ...
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0answers
162 views

Could other people steal my Internet connection if they had my PPPoE data?

Would it be possible for other people to use my PPPoE data to get Internet access or is it somehow restricted to my house? Then what about my neighbors downstairs, could they do it? And what about ...
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0answers
182 views

How to secure requests to my API from my web widget embedded in third party website

Background I'm designing a web widget for a new SaaS for embedding in a password-protected CMS. This would allow the customer to add something like the following to all the pages in their CMS to ...
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2answers
805 views

Table or row level security in ASP.NET MVC 5 and Entity Framework 6

I've already asked this question on Stack Overflow, but no one answered, so maybe it's a more appropriate place to discuss it. Please let me know if I'm wrong and having duplicated question on ...
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1answer
146 views

Tomcat Client authentication

I want to make sure that my webapp is secured: I have a tomcat server - and defined the connector to use clientAuth="true". In my trust store there is only the certificate of my CA (self signed). ...
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0answers
114 views

is Form Authentication more secure than using the session authentication?

Recently I have read about the form authentication of Asp.Net but I can discern no differences in the term of security between it and the session authentication. For Example if somebody hacked my ...
4
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1answer
134 views

Can BTRFS provide authentication on an encrypted disk?

One of the problems of disk encryption is providing authentication. An attacker with access to the ciphertext can modify the ciphertext at will without consequence. Given, this isn't a likely attack, ...
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3answers
2k views

How to replace an old password hashing method with a newer one in software? [duplicate]

The software that our company builds just went through a security audit. The auditors flagged our use of MD5 for hashing passwords that users can set if they want a password on their files. Having ...
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1answer
55 views

Should I stretch the secret key in a secure cookie protocol implementation?

I'm building an api authentication layer that basically works like the secure cookie protocol, where instead of a cookie I give the api client a token which they must provide on subsequent requests. ...
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1answer
183 views

Root The Box - easy CTF framework [closed]

I am planning to host a CTF contest in a few months at my local university. While searching for some hints I met this wonderful tool called Root The Box. It basically gives you all you need to host a ...
48
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7answers
3k views

Do security questions subvert passwords?

Do security questions subvert hard to crack passwords? For example, if a site requires passwords with a certain scheme (length + required character sets) and has a security question, why would someone ...
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2answers
144 views

Issuing secure tokens that doesn't require any server side state

The issue I am currently designing the backend for a SPA (Single Page Application), which I'm planning to construct in a fairly RESTful manner. The backend will ideally be just a thin layer between ...
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1answer
330 views

Authentication, authorization in native mobile clients (Android)

I am developing native mobile client for store that requires user authentication in order to make purchases available. I have my web store page, authentication is provided by CMS (OpenCart). Now I ...
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1answer
151 views

What's the typical approach to caching invalid authentication attempts?

Clients (actually software pieces developed by some random dudes all over the Internet) are authenticating on a web server using "basic" authentication scheme and to do so they are passing the ...
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6answers
446 views

How to protect against adversaries snatching booted laptops to defeat full disk encryption?

I read an article describing how FBI agents snatched Ross Ulbricht's laptop while it was running to defeat full-disk encryption: Two plainclothes FBI agents, one male and one female, walked up ...
4
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2answers
512 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?
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1answer
283 views

How secure is CertiVox M-PIN?

CertiVox have designed a system with the aim of "getting rid of passwords". Essentially the system authenticates users with two factors of authentication: A 4 digit PIN and a token stored within the ...
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2answers
159 views

Save application autostart login token on computer

I need to login desktop application while autostart on server (like skype does). What is the best practice to save authentication token (password)? Should I use something like RSA encryption (which ...
23
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2answers
3k views

How do Travel Sentry locks work? (supposedly openable only by security agencies)

Apparently Travel Sentry locks can only be opened: by their owner, by the TSA, CATSA and "other security agencies". How do they work technically? Is there some electronics embedded with ...
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1answer
178 views

Why is information obtained from public records considered a secure way of confirming your identity?

Various financial institutions, government agencies, etc., use public records information to confirm people's identities, as touched upon in UPS my choice -- How can I access my public records? The ...
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7answers
10k views

Why isn't open WiFi encrypted?

As far as I understand, WiFi networks that require no password send traffic through the air unencrypted. Those that require a password encrypt each connection uniquely, even if they're all using the ...
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2answers
113 views

Certificate chaining:Intermediate Certificate Authorities

Wikipedia says: For example, if a certificate issued to "example.com" and issued by "Intermediate CA1", and the visiting web browser trusts "Root CA", trust may be established in the following manner: ...
13
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2answers
652 views

How do I prevent my twin sister's “pulled from public record” information from being used when I try to answer security questions?

Several times in the past months, I have been asked security questions that are "pulled from public record" to verify my identity, either over the phone or on a website (Chase Bank, Walgreens ...
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2answers
962 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: ...
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2answers
155 views

Does Convergence solve the problem of hacked CAs?

My question is about the Firefox AddOn Convergence. So my question is if it is possible for convergence to observe that a phishing-site which is verified by fake Certificate because a hacker of a CA ...
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1answer
124 views

Centralized authorization with distributed service providers

I'm thinking about implementing a single sign on service with a centralized permissions management for a distributed network of service providers (so authentication as well as authorization). The ...
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1answer
136 views

Is This DIY Password Authentication Scheme Acceptable?

This is mostly a thought experiment for client/server communication, and I want to know the flaws. When a user account is created (with U as the username and P as the password,) I generate a random ...
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3answers
4k views

static vs dynamic vs challenge response

I am taking a security class. The slides say that smartcards usually use one of three types of authentication protocols: static, dynamic and challenge response. What is the difference between these?
3
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2answers
366 views

What stops an SSH server from MITMing logins?

When I read this question about what gets signed with the private key by the client I wondered: What stops the following scenario from happening: A client connects to an SSH server. The SSH server ...
2
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0answers
156 views

What is a 'host identity' in the 'Host Identity Protocol' (HIP)

I'm a little confused about terminology in the Host Identity Protocol (HIP) The two distinct terms Host Identity and Host Identifier are described in https://tools.ietf.org/html/rfc4423#section-3 ...
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1answer
3k views

Bypassing CVE-2010-4478 (J-PAKE parameter validation) in OpenSSH 5.1

Did anyone successfully exploit CVE-2010-4478 in the past? This is insufficient validation of the J-PAKE public key parameters in OpenSSH up to 5.6. I'm dealing with a vulnerable machine running ...
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1answer
40 views

Locking access to remote DB from a freely downloadable app (that acces the DB)

If I want to publish a software that needs to interact directly with a remote database, I will have to put on the software all the required credentials and logic to have the access from the program ...
5
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3answers
123 views

HTTP Server: Response time on login request

I have a site on which I would like to prevent an unauthenticated attacker from knowing if an account exists. On the site, passwords are hashed using bcrypt, so login requests must do a bcrypt ...
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1answer
70 views

How to manage a custom session in a webapp?

I was reading through the OWASP Cheat Sheet and something mentioned in the "Weak Authentication and Session Management" row did not make sense to me. It is recommended in the Design Column, that ...
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2answers
138 views

two factor authentication without TLS/SSL

It seems silly to ask about using two-factor authentication without TLS/SSL but, I have a vendor that is using public IP without TLS and asking for login creds. Would the login be more secure if ...