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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HMAC Signature Based authentication for REST APIs

We are building publicly available RESTful APIs for eCommerce where clients can place logistics requests with us. We want stateless authentication on these APIs. While on-boarding, every client will ...
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1answer
20 views

Will the Credential Management API now available in Chrome 51 be widely adopted?

Google Chrome 51 stable includes support for the Credential Management API. This implementation is based on the W3C spec. Will other browsers support this technology (particularly Safari)? Will web ...
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16 views

How can I authenticate securely to an internal website from an iPad without an strong password?

I would like to authenticate from an iPad to a website securely without using a strong password. I have though of these possibilities: Credentials stored in the iPad (like Gmail credentials). Using ...
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0answers
13 views

How can I test my SSO connection without having access to the Identity Provider?

I'm trying to set up an SSO connection using Auth0. My app is set up as the Service Provider (SP), and it needs to work with PingFederate as the Identity Provider (IdP). I don't have access to an ...
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22 views

Simulation vs Formal Analysis of Authentication Protocols

I received a review for my journal paper in which we proposed WOOlim or nspk kind of authentication protocols. We proved the strength of our protocol with rigorous formal methods using CSP and rank ...
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1answer
103 views

Sharing access-tokens in response header?

What's the best way to share my access tokens, I mean, is it okay to share it in the header as plain-text? - Or do I need to look into e.g.: JWT? Current workflow: -> POST /api/login -d {**creds} ...
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6answers
10k views

How to implement multi factor authentication using a token generator?

I'd like to implement multi factor authentication on a few projects. Now the first factor would be username and password, for the second factor I would like to use a token generator. These tokens ...
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1answer
62 views

SAML token and service calls

I am working on a tablet application and have come across an interesting issue We have a domain joined tablet that runs a Windows Store Application, we already have user identity and we need to call ...
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1answer
55 views

Is installation id secure enough to authenticate device's user against a Web Service API?

...or interactively asking for password / or having some certificate is inevitable? Context My Android app wants to do secure transactions via my Web Service API. However I do not want to bother my ...
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10answers
4k views

Isn't OAuth, OpenID, Facebook Connect, and others crazy from a security standpoint?

I work with APIs all the time and I work with web developers who insist that OAuth, OpenID, etc are far superior than a home-brew method. Every site seems to be using these as well now for ease of use ...
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0answers
17 views

Dynamic Key Management in WPA through Radius server

Can anybody tell me in detail (or provide good links), how the dynamic key management is done by the authentication server in WPA? In other words, let's say I gave my credentials to the authentication ...
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1answer
72 views

Is it secure to refesh a JSON Web Token (JWT) auth token using the user credentials?

As I understand the answers to this question JWT: Is refresh an expired token is a good strategy?, one should use a refresh token to refresh an expiring auth token. Since my web app should be ...
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28 views

Use MDC to provide origin authentication for public key encryption?

Why can't we use an manipultation detection code (MDC) to provide origin authentication when using public-key encryption?
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20 views

Providing identity verification via confirmed contact info to unconfirmed address w/o leaking information?

I emailed a known e-mail address for my local telecommunications/internet company about a complaint with their service. It appears the person I emailed forwarded this to somebody else in their office ...
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0answers
904 views

Social Login + OAuth2-secured REST API

I'm implementing social login with Facebook, Twitter and Google+ on our OAuth2-secured REST API (secured using spring-security-oauth). I'd like to make sure that the following flow is secure and that ...
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1answer
670 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 ...
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2answers
40 views

Is there any added security/vulnerabilities if you allow a “trusted-party” to vouch you are legit, if you were locked out of your account?

I was reading this answer on a question. http://security.stackexchange.com/a/498/106817 Recently, at the OWASP AppSec 2010 conference in Orange County, Bill Cheswick from AT&T talked at ...
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4answers
360 views

OAuth2 vs. JSON authentication

1) To what extent is OAuth2 more secure than JSON authentication (both over SSL)? The context is a client (one server) querying another server (via API) within a local network using RESTFul. Prior to ...
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4answers
255 views

Why is using SQL injection to extract passwords or password hashes from a login database (that should never legitimately disclose them) even possible?

(Okay, so I'll confess upfront that while I'm trying to educate myself the current state of my knowledge on web applications security is still pretty shallow. So I appreciate your patience if the way ...
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0answers
39 views

What is the current consensus on storage of primary credentials or long-lived cryptographic tokens?

The problem: some environments need to use plain text credentials or long-lived tokens in order to unlock a specific functionality. Examples include third party legacy services which need a ...
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2answers
150 views

Mobile API Authentication

I'm trying to design an Android Analytic service where every user's application who register in this service needs to download our SDK. The SDK itself need to communicate with our API server. The ...
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0answers
41 views

Framework to authenticate web API requests from legacy application

I have a legacy ASP.NET MVC application that uses pretty standard forms authentication which validates logins against an application database. The scope to change this application is limited, however ...
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1answer
75 views

Handling user login using asymmetric cryptography

Is it possible to implement a login protocol with asymmetric cryptography instead of the hashed password method? For example, while creating an account, the client generates a private/public key pair ...
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1answer
109 views

Why is storing usernames in cookies bad? [duplicate]

A commonly repeated advice over the web is not to store usernames in cookies. However, I don't really understand the problem. What I'm doing in my web application is: I generate a 16-byte (converted ...
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0answers
23 views

Would encrypting a signed JWT prove viable to secure claims payload?

I am working on a server-client web application, and as an authentication scheme, I am issuing base64 encoded json web tokens. Consider the following token... ...
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113 views

Secure Handshake and register for Auth

The registration The Start - pre-authentication Let's assume there are Alice and Bob. They know each others public keys and each of them generates a random string - Bob's Bobkey and Alice's ...
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1answer
30 views

Why is CBC-MAC insecure for variable length input?

Can anyone explain why CBC-MAC is not secure for variable length message? I read many books, but there are still some confusion. Like the highlighted parts in following pictures Slide 32: Slide ...
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2answers
637 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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1answer
1k views

MPPE-Send and Receive key derivation from MS-CHAPv2

I am trying to get the MS-MPPE-Send-key and MS-MPPE-Recv-key from the MS-CHAPv2 challenge material. I am able to follow the RFCs 2548 3078 and 3079 to the step of getting the GetNewKeyFromSHA() it is ...
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3answers
231 views

Is it secure to return a JWT to an already-logged-in user?

I'm using JWT to handle an SSO scheme where two systems (let's call them A and B) both require authentication, but the user datastore is in one system only (let's say A). Everything I've seen about ...
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1answer
84 views

Can Passpoint X.509 certificates be used to MITM SSL connections on Passpoint networks?

Passpoint/Hotspot 2.0 public networks like LinkNYC require users to install X.509 certificates, for EAP authentication. Can these certificates be used by the provider to execute man-in-the middle ...
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1answer
132 views

securities concerns about calling REST API from multiple servers

There is a master web application that needs to call REST APIs from servers of other applications. I can think of two ways to achieve it: a). call APIs on the front-end of the master ...
7
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2answers
244 views

Microservice to Microservice Auth

We're planning a new architecture which will utlize a backend of many different microservices that will need to talk with each other as well as field requests from systems not part of the service. In ...
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3answers
136 views

Could a spoken (TTS) SMS-based 2FA be intercepted?

In mid-June, Lastpass made news again, and I've since been mowing around the idea of two-factor authentication. After familiarizing myself with SMS and Google Authenticator, I thought the SMS was a ...
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0answers
51 views

How does server process validates the credentials supplied by client in basic authentication [closed]

I am clear at high level what is happening in basic authentication. the portion what I am missing is, soon after server process receives windows account credentials from client, how does it validate ...
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1answer
61 views

Authentication scheme security: unique link and birth date

Recently I had to make an appointment at a hospital. I got an email with a link with a token in the form of a GUID. This brought me to a page where I had to enter my birth date to see the details. ...
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1answer
64 views

How is github 2FA personal access token more secure than passphrase?

I recently enabled 2-factor authentication (2FA) on my github account. Once you enable 2FA, you can no longer connect to the repo using your normal passphrase using command line tools. You have to ...
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1answer
1k views

What is a AUTH-KEY in the security of the computers?

I'm studying security in computers and in particular the URL Spoofing. I understand that a form of URL spoofing is phishing. Then I read that a countermeasure against phishing is the authentication ...
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1answer
38 views

Is it secure to get auth TOKEN from server with javascript?

Is it secure to manipulate with auth token inside client side javascript over https ? I want to pass that token to websocket after login. $.getJSON( $SCRIPT_ROOT + '/jscript_get_auth_token', {}, ...
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2answers
81 views

Challenge authentication without roundtrip

Is it possible to have a secure challenge/response authentication protocol, authenticated immediately? Too slow: a client request -> server challenge -> client response -> server response Fast ...
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1answer
208 views

Secure login procedure

I have implemented a login, and session, procedure for a web app and I am wondering whether what I have implemented is secure enough. The authentication is based on login password on https. If the ...
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1answer
140 views

3rd Party Authentication protocol

I have a hardware device (H), phone (P) and web server (S). I would like P to be able to send commands to H, but only if it is authorized to do so. Permissions are stored on server. Technically I ...
4
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2answers
767 views

How long should a session absolute timeout be?

OWASP Session Management Cheat Sheet (https://www.owasp.org/index.php/Session_Management_Cheat_Sheet) recommends to implement an absolute session timeout (in addition to idle session timeout). It ...
5
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1answer
84 views

Why does Android care about differentiating multiple fingerprints?

I was reading through the Android Compatibility Definition document after a friend pointed me there while we were discussing fingerprint scanners and other biometric authentications. I noticed this ...
18
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6answers
3k views

Why do we ask for a user's existing password when changing their password?

In a web applications context, when a user wants to change their current password, generally they would have to enter their current password first. However at this point, the user has already been ...
2
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1answer
355 views

Is there any security risk, if the database with key handles for U2F devices are leaked?

Is there any risk, if a database of U2F device key handles are leaked? Enrolling a key works by: Send Enroll request with "AppID" to U2F device. U2F device answers with "Key Handle, Public Key". ...
2
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4answers
263 views

What's the idea of two factor authentication? A hacker can use password with mobile

2-factor authentication means to enter MOBILE app (using username and password) and there you get code to enter your account from PC browser, right? But if hacker has my password, then he can enter ...
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0answers
37 views

How should I authenticate a third party's users on my platform?

I'm having trouble finding implementation ideas / guidance / examples for an authentication system that has the following properties: Allows a third party to carry out actions on our platform on ...
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1answer
59 views

How can I protect named pipes in windows?

I have some misunderstanding regarding how to secure the communication of named pipes in windows For example, I have a windows service that talks with other processes via pipes, how can I make sure ...
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1answer
3k views

SIP Provider stores credentials, is it required for some SIP phones?

My SIP provider stores my SIP call time password as AES encrypted in stead of hashed. I understand that SIP authentication has the capability to NOT store the password, and in stead store a ...