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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11
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0answers
842 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 ...
4
votes
0answers
58 views

Security protocol for NFC stickers/cards

Lets say I'm using NFC cards for access control. NFC cards/stickers are easily readable and writable, so my worry is that the data on them could easily be cloned onto another card/sticker and bypass ...
3
votes
0answers
58 views

Deal with number changes in a phone number based authentication/login system

Twitter Digits (https://get.fabric.io/digits) provides an authentication/login system based on phone numbers for mobile apps, and several other mobile apps (e.g. Square Cash, ...
3
votes
0answers
298 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 ...
2
votes
0answers
34 views

Using RSA-SHA as/instead HMAC in OpenVPN?

While reading the manual of OpenVPN 2.3, I came across the --auth alg option. The manual says: Authenticate packets with HMAC using message digest algorithm alg. (The default is SHA1 ). HMAC is a ...
2
votes
0answers
24 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 ...
2
votes
0answers
52 views

Ouath2 how does it work (Android client)

I have read a lot about Oauth2 but still cannot understand, how does it work. I will explain how do I understand this protocol. There are some main characters in Oauth protocol interaction. User, ...
2
votes
0answers
42 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 ...
2
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0answers
76 views

OpenID Connect: Why use authorization code flow?

I have a question about implementing OpenID Connect I was hoping I could get some help on. I understand the different flows and get that the authorization code flow is good because it allow client ...
2
votes
0answers
371 views

JSON Web Tokens vs. SAML

I don't know too much about security. Specifically, I don't understand the difference between JSON Web Tokens, SAML and OAuth 2. If you could provide some pointers and high level overview of their ...
2
votes
0answers
96 views

How secure is docker container-to-container traffic?

I'm working on building a web application using the microservice architecture pattern in a set of docker containers and I'm wondering about the importance of securing the communication between the ...
2
votes
0answers
185 views

NFS IP spoofing

I am using VirtualBox: where the guest is an Arch ISO and the host Windows/Cygwin or a generic Linux. For sharing host folders, VB native shared folders is not an option (since the setup requires ...
2
votes
0answers
252 views

Should Javascript & IFrames be used to refresh sessions when Master Cookie Domains are used?

Suppose I have 3 sites that I want to have SSO in, site1.com, site2.com, and auth.com. SSL is always required. According to how SiteMinder cookies are described here, one of those domains would ...
2
votes
0answers
195 views

How to verify a message?

I have a 192 bit data string and a 384 bit signature calculated with curve ANSIp192r1 as well as the public key. These readings originate from a SYM2 electricity meter and I would like to ...
2
votes
0answers
225 views

If my users use Google OAuth for authentication, can I allow 3rd party apps to read data on my site?

Suppose I run a book club, and each of the members sign into my website using an OAuth token from Google, Twitter, Live, or LinkedIn. When the book club becomes popular, we discover that 3rd party ...
2
votes
0answers
61 views

What flexibility does a “Third party gamma” offer to U-Prove deployment?

The U-Prove SDK has the following comment: (link) // 1: CA-RA split (a party trusted by the issuer provides the gamma value) Given that the Gamma value (if provided) overrides the Attributes value, ...
2
votes
0answers
99 views

In U-Prove, what is the purpose of “Pseudonyms”, “Committed”, and “Scope” values and how are they used?

U-Prove allows for anonymous authentication and authorization without the involvement of an IdP. When a client generates a presentation proof 3 values can be optionally included, but I can't find ...
2
votes
0answers
178 views

Determine deployed 802.3x encryption/authentication protocols? Or, why can't I access Eth0?

Is there any means to identify deployed 802.3x authentication protocols on a wired interface (eth0) under Windows 7 (CLI), or from wlan0 on a *NIX based system? The scenario is as follows: I am a ...
2
votes
0answers
95 views

Distinct databases with the same Kerberos Authentication server

Should two deployed applications within a private network requiring distinct databases (for storing their own users credentials) require distinct Authentication servers (implementing Kerberos)? Or is ...
1
vote
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38 views

Time Based Authentication

I need a way of authenticating that a file was generated by a particular machine that has a unique ID and a unique random secret also known to the authenticator, as an added difficulty the file ...
1
vote
0answers
27 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 ...
1
vote
0answers
46 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 ...
1
vote
0answers
34 views

What happens when authenticating through a phishing attack with FIDO U2F tokens

So I have looked around and haven't found this anywhere. What happens when the response server is a phishing site with FIDO U2F tokens? Basically, if login just fails, I would assume that the user ...
1
vote
0answers
30 views

Oauth authentication without state parameter

I have some security concerns about the first step of account authentication in my application. The authentication goes through an OpenID provider. If the response of such provider shows that the ...
1
vote
0answers
54 views

Logging in from one CMS to another

Two websites with different CMS, user should type login & password on one website and needs to be logged in second website automatically. Now i have this method, it works but i want to know - is ...
1
vote
0answers
58 views

HMAC authenticated API calls with multipart/form-data file uploads

We have an existing API where 3rd parties can push data. The API calls are authenticated with HMAC using the same scheme as described in Ruby's ApiAuth library which I use to verify signed requests. ...
1
vote
0answers
100 views

Identify the attestation certificate (X.509) in Fido U2F registration response

I'm trying to identify the attestation certificate (X.509) in Fido U2F registration response as described in fido-u2f-raw-message-formats-v1.0-rd-20141008.pdf document: An attestation certificate ...
1
vote
0answers
102 views

Accessing the Exchange EWS API with safety in mind

I'm new to the security stack exchange, so feel free to edit the question or redirect me to another forum if this is not fitting. I'm currently working on a web application that will allow the user ...
1
vote
0answers
39 views

authentication token not stored in DB

I am implementing a webserver and the guideline I am following suggests: - to create token by a Serializer that takes the IdUser, a symmetric key and an expiry date - provide it to the user but not ...
1
vote
0answers
107 views

Is generating custom authentication token for WCF service requests a good practice?

I have public WCF web service which works over https. There are lots of technical restrictions on client side, so I can't use any advanced schemes like oauth. I have registered users and some of them ...
1
vote
0answers
75 views

Questions about SRP algorithm

I trying to use SRP algorithm but I have some questions: Is that a good choice to use for registration and authorization SRP algorithm with SSL/TLS? And for all other transmission using just ...
1
vote
0answers
71 views

How does disabling sign in upon confirmation make devise any more secure?

Referencing reasons given in this question http://stackoverflow.com/questions/18655334/avoid-sign-in-after-confirmation-link-click-using-devise-gem Devise does not allow the immediate sign-in of a ...
1
vote
0answers
62 views

Is the session key system that I use for authenticating users of my Google Cloud Messaging application secure?

The system works as follows: The user registers a username with the server over HTTPS, which generates a random 256 bit number, converts it to base 64, stores it on the server database alongside the ...
1
vote
0answers
92 views

Security considerations for RESTlike HTTP API of an embedded system

I'm designing a HTTP service for an embedded device and wondering if the following security concept is good enough: SSL(Up to Version 3) is enabled by default, TLS is not by limitations of the ...
1
vote
0answers
73 views

Protecting data on a remote device

Background I have am developing a service which consists in a small headless client device (e.g. OLinuXino) which will contain sensitive data. The device will be plugged to a remote network (maybe ...
1
vote
0answers
167 views

Using a bearer token to get a federation token from ADFS

Why is it not possible to use a bearer token from an IdP STS to get ADFS (2.1) to issue a token? All issuedtoken endpoints require a symmetric or asymmetric key in the IdP token. Is there a specific ...
1
vote
0answers
23 views

IdM on apps we host for a client

We're looking at hosting some of a client's existing applications in our environment. My current thinking is we will have an encrypted channel back to the client's network over which authentication ...
1
vote
0answers
107 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 ...
1
vote
0answers
105 views

Allowing third-party clients to authenticate with an app server

I'm working on an app that is planned to be licensed to OEMs, who would in turn offer it as a service to their users.  We would host the app server and the OEM would optionally host the app's web ...
1
vote
0answers
446 views

Mobile Backend Server: How to validate authenticated client is valid?

Consider this scenario Step 1: App asks user to "Sign In" using Google or Facebook Step 2: Once authenticated, app sends user's Id (from Google/Facebook) to My App Server requested to app ...
1
vote
0answers
128 views

How to add user entries with password field in LDAP over HTTPS

I am new to this kind of stuff (HTTPS etc.) and pretty much confused on how to go ahead with this. An LDAP server (ApacheDS) at the back-end stores the user details. To add new users, the user ...
1
vote
0answers
112 views

Security for message queue in ActiveMQ

I am using ActiveMQ and WSO2 for my application. I need to protect my queue to restrict posting of messages by anonymous users(I need to protect my queue with some password). I know, there is a ...
1
vote
0answers
187 views

CAS protection against CSRF attacks

A website based on Apache Struts uses central authentication service (cas) for login. I'd like to know if additional csrf protection needs to be provided with Struts in case cas doesn't provide that. ...
1
vote
0answers
165 views

Can the device seed be recovered from the iPhone/Android RSA SecurID app?

The Windows RSA SecurID app allows the device seed to be determined and cloned from one machine to another (see this blog post). Do either the iPhone or Android RSA SecurID apps suffer from the same ...
1
vote
0answers
160 views

Login Authentication with SSL and HMAC

My question is pretty similar to : http://stackoverflow.com/questions/5487757/using-hmac-sha1-for-api-authentication-how-to-store-the-client-password-secure. Basically, I want to write an API for my ...
1
vote
0answers
175 views

Client-server authentication protocol suggestion

I'm designing an authentication methods for my client/server system consisting of: a windows desktop client application (.NET) windows/linux servers (C++) one "security server" which authorizes the ...
1
vote
0answers
74 views

Considerations when implementing a key based SSH-like auth scheme

I have a SMTP server where all the users (for an unrelated reason) will have public keys tied to their username and registered with the server. I want to add a non-standard extension that uses these ...
1
vote
0answers
174 views

Can we create custom APDU for non-smart (memory type) contactless card?

I want to implement card-based authentication for the parking system in a university. Currently all students own a Java Card-based student ID card, if they have not broken or lost it. Can we create ...
1
vote
0answers
210 views

Digital signature based authentication schema using two passwords

I'm working on an authentication system for a web based Bitcoin-related service. As part of the service, users do some less sensitive operations (mostly reading and sending various types of ...
1
vote
0answers
439 views

I authenticate my users through Facebook's Oauth client and want to secure my own called APIs

My application is divised into two parts: Javascript application as client Server side API's (RESTFUL through Play!2.2 framework) I expect users to be authenticated through Facebook's Oauth 2.0 ...