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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Understanding Digital Certification as as a whole starting from a normal http request

I am very new to security and i do not come from an IT background. Please pardon me if i ask some very simple and questions that don't make sense. I am trying to understand the difference between ...
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2answers
73 views

My IP address switched suddenly and then switched back

Sometimes I look at the login history of my blog account (a Tumblr blog) to make sure no one else is logging in (because I have private posts that I want to keep private). Even though today I ...
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1answer
94 views

OS login password: How does it work?

I am making an application to create a password for a user. I am a bit baffled over how it all works though. Namely I want to be sure that my application will store the correct hash so the user can ...
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1answer
54 views

How dangerous is reflected request query strings?

I have discovered a possible security flaw in a login for a site that many people rely on. I won't say the site but in the URL there is something similar to ...
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1answer
68 views

Active directory authentication and authorization for an application

Currently all our applications are web based and our authentication and authorization mechanism is always through the database. eg database logins and access controls defined at database. However now ...
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5 views

Enabling MFA in Windows 7 [migrated]

How does one set on Windows 7 that you have to login with 2 methods? For example, first time with your password and then you are forced to use fingerprint or smart card ... and after that your PC will ...
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47 views

Can TLS provide integrity/authentication without confidentiality

It was a bit surprising when wikipedia has switched to TLS because we all know it's public information available to anyone, but I suppose that the real purpose for that is to provide ...
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1answer
46 views

Choosing token over Session or vice versa?

I wanted to build a secure user interaction to the server, but I stumbled upon using either token or session. Here are couple of options that I thought about: I learned JWT, built a token, and send ...
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1answer
49 views

Bi-directional authentication in OpenVPN

I have an OpenVPN gateway setup. A CA was created on the same server with Easy-RSA. Each OpenVPN client has its own certificate-key pair issued with the abovementioned CA. Server has its own ...
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12 views

What is the goal of sign a key in BrowserID certificate?

I'm learning about the Mozilla Auth. it has an implementation of SRP protocol in https://github.com/mozilla/fxa-auth-server/blob/master/docs/overview.md and his client; example is ...
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1answer
18 views

Is it secure to have an iPad app run a webDAV server on localhost without authentication?

I have two iPad apps running on the same device. One is hosting a webDAV server on http://localhost:8080 without any authentication (the server is active whilst the app is foregrounded, and for a few ...
2
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0answers
29 views

Low-resolution account enumeration with Office365

I am interested in the intersection of account enumeration and single sign-on. Often, there will be SSO-only and non-SSO users alongside each other in an application, and in terms of improved ...
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0answers
23 views

Is this legally reverse engineering - unsecured API [migrated]

Is it (in a legal sense) reverse engineering to 'hack' into a completely unsecured API? Simple REST API used in Android app No SSL (just strait HTTP) Passwords are sent in plain text over this ...
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1answer
40 views

Why use a proxy to hide OAuth client credentials in password grant calls?

In a November 2014 article by Alex Bilbie, OAuth users were advised against making the client send its credentials (client_id and client_secret) when performing Resource Owner Password grant calls. ...
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1answer
45 views

Is there any authentication scheme relying only on the “secret” question?

I know it's standard for websites to use usernames and passwords to authenticate users. From what I've read, question based authentication is usually used to either reset a password, or employ ...
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0answers
11 views

Aptexx resident anywhere broken authentication [closed]

I have tried to understand how to exploit this vulnerability and i didn't understand it so, i want explanation about how to exploit those kind of vulnerability Description Summary: When an actor ...
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1answer
61 views

Does the carrier network autheticates itself to the SIM card?

From my understanding this is how SIM authentication works: When the mobile device starts up it obtains IMSI from the SIM card and send it to the operator network Operator network finds the Ki(128 ...
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0answers
21 views

Checks to perform on application if we have the normal user credentials? [closed]

Suppose we have any web based application. If we want to find its vulnerabilities, how can we start the process? Moreover, there are two situations: if we don't have credentials to enter the ...
2
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1answer
70 views

OpenVPN username and password authentication only - unsafe?

Is it safe to only use username and password (and server certificate) for OpenVPN connection authentication? Are username or password ever transmitted in plaintext to the OpenVPN server? I found a ...
0
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2answers
108 views

Diffie-Hellman and MIM attack, and server identity

Diffie-Hellman and MIM attack: When variants of Diffie-Hellman algorithms like DHE, ECDHE etc. are used in SSL handshake for key exchange then can it become prone to man in middle (MIM) attack. ...
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0answers
55 views

Best way to deal with cross-domain authentication in intranet

Firstly, I'm not sure if this is valid board to ask this question - maybe it should be asked on StackOverflow? Overview on use-case, what we trying to achieve: Two servers, on two different domains; ...
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3answers
118 views

How to prove ownership of a website?

We all know how banks identify themselves to users. No, not through TLS certificates. The users pay no attention to those. No, I'm talking about branding-- all those fancy logos and stock photos that ...
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0answers
27 views

Trying to figure out the hashtype of this digest-auth htpasswd file

Simple question for y'all as i'm having some trouble identifying the hash type of this from a http digest file that I have setup for rutorrent on a apache2 server. Here's an example of what it looks ...
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1answer
42 views

Use PIN or Password [duplicate]

Which one is better, using PIN or password ? I want my app using PIN number to user login and register. Does not matter if I use PIN number only for user login and registration in my web application ? ...
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59 views

implementing a secure client-server system

I am creating an Android app that communicates with a server. I need a safe way to transmit sensitive data so this is what I planed to do: Use ssl pinned to the app, so the app knows the server. Use ...
2
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2answers
75 views

Is Google 2-factor “Remember this Computer” secure against adversaries with root access?

This question concerns the type of 2-factor authentication implemented by Google Accounts. The response to this question describes securing transfer of the secret key via a secure cookie. But what ...
2
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1answer
51 views

Authy: Does multi-device mode imply that all keys are stored on their servers?

My understanding is that if you use Authy, without backups/multi-device options, none of your account keys are stored on their servers. It all resides on your single device. Ie, even if Authy ...
2
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2answers
54 views

Verification code within mobile phone applications

In most phone applications with two factor authentication I noticed that the verification code is usually 6 digits long. I wonder why 6 digits are needed - we already know that the user is associated ...
4
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3answers
82 views

2-Factor Authentication vs Security Questions

I have an account with a bank that has additional security option. When it does not recognize a device being used to access the account, it will either: Prompt with 1 of 3 security questions Send a ...
5
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2answers
184 views

How secure is PIN login to Windows?

I've just noticed that Windows 10 allow me to change my login method to PIN which is obviously much more convenient than entering my long and secure password after every startup / wake. I am just ...
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7 views

change login time/date on Linux [migrated]

Is it possible to 'backdate' a login time on a Linux server by changing the date? For example, I just ran lastlog on one of my servers and included in the expected records was this: root ...
2
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1answer
55 views

Logout tied to cookie expiry

I am looking for an event to automatically logout a user from the application. Typically I would do it when an inactive session expires. I was wondering if it is secure to do so using cookies. So here ...
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1answer
43 views

Authentication on client server

I have following requirements for system: My admins authenticate on client servers Over http Central authorization server My solution is based on O-Auth: user is redirected to authentication ...
4
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1answer
63 views

“MAC function must resist existential forgery under chosen-plaintext attacks”, what does that mean?

While reading about MAC (Message Authentication Code) I have faced this sentence: MAC function must resist existential forgery under chosen-plaintext attacks but I got confused. What does ...
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21 views

Relationship between the validity of license of an accredited CA (certificate authority and the validity of it's certificate? [duplicate]

To more clear, let's see my example: As I know, in Korea, the validity of a CA's license is only 2 years, but the validity of this CA's certificate is 10 years. Why is the valid time of the license ...
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9 views

Is it possible to UI automate testing involving Two-factor Authentication for an iOS app? [migrated]

I have an iOS app that uses 2FA for certain account related features. I'd like to create some UI automation tests for those features, but they require receiving either SMS messages or email. On a ...
3
votes
2answers
98 views

Can I prevent timing attacks with random delays?

I read recently about profiling for valid user accounts with timing attacks, IE the application-under-attack takes a predictably different amount of time to process say a login on a non-existent user ...
0
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1answer
38 views

Will Wordpress nonces protect against Login CSRF?

Can Wordpress Nonces be used to protect against Login CSRF? https://codex.wordpress.org/WordPress_Nonces I glanced through the code for the function and it seems to only be using the User ID for ...
5
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1answer
136 views

Why require root to be the first entry in /etc/passwd?

Security policies sometimes demand that root be the first entry in the /etc/passwd file. Is there a valid reason for requiring this, or is it just conventional to do so since the root account is the ...
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votes
1answer
50 views

How to authenticate a user account from a website over the phone?

A support team is answering calls and providing well support. It would be conceivable for someone to impersonate or ask for something which should be authenticated first. Which are the best methods ...
1
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2answers
49 views

Can a “client-initiated” session cookie provide more privacy and security than existing session alternatives?

There are several uses for a cookie, and I would like to offer some kind of guarantee that a cookie is being used for a specific, limited purpose and scope. In my case, I want to prove that a cookie ...
0
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0answers
23 views

In what ways may a SAML2 service provider interoperate with an agency using Common Access Cards (CAC)

I'm at a service provider organization that supports shibboleth-style and CAS third party authentication. I'm looking at the requirements to meet the low baseline of FedRamp (see FedRAMP Security ...
1
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0answers
12 views

Passwordless ssh with paramiko fails to authorize [migrated]

I am having trouble getting authentication working with paramiko SSHClient. Trying to go from one virtual machine out to another box on the network. The general idea is that I create a public/private ...
2
votes
1answer
72 views

Randomly generated token vs JSON web token

I'm trying to secure access to my web server. I have been implementing a JSON web token authentication where I randomly generate a secretkey and associate it with that user. The secretkey will then ...
5
votes
1answer
116 views

How long does 2-factor authentication codes have to be?

I've noticed that from a (personal) UX point of view, 4 numbers which my online banking uses seems to be a sweet spot in terms of holding it in my head from looking at my phone to typing it it. But ...
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0answers
27 views

Should universal delete, or “the right to be forgotten”, be an extension to OpenID Connect “signout” or authentication in general?

There are different levels of maturity various OpenID connect implementations may have. One of the optional features is the session management and sign out feature. Now that this has finally ...
2
votes
1answer
86 views

Token based approach to authentication over SSL Rest API - refresh tokens

I'm quite a newbie at security. I'm developing an android app with a token based approach to authentication. I'm not using Oauth as the OAuth 2.0 is not an authentication protocol but rather used to ...
0
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63 views

Multiple user type management - token based authentication

I am currently working on an e-commerce application. The application has different users: Customers Merchants Logistics Admin The current db structure has a different table for each of these user ...
0
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1answer
44 views

Should I use the certificate serial number or the subject key identifier to look up public key?

I'm designing an API authentication mechanism similar to the one AWS use. As part of that, I need to look up which public key belongs to which user to verify. The public keys come from x509 ...
5
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2answers
267 views

How to ensure that a person whose identity has been verified from an I.D. is the author of their exam answers?

Background We are designing a computer based test system where the examinees use their own computers to write their answers. The examinees' computers are booted to a custom Linux OS from USB drives ...