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1
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0answers
58 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
26 views

Is indirection with ID federation possible?

At the moment I'm trying to design a system with some services. These services should make use of an ID provider (a) for login (for example using OAUTH) and another ID provider (b) to get user data. ...
1
vote
1answer
113 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 ...
0
votes
2answers
591 views

Security of cloud-based password manager (Dashlane, LastPass) vs. federated login (OpenID, Google, Yahoo, Microsoft, Facebook)

Many websites offer the option to log in with your existing Google or Facebook account (among others). For a long time I've resisted doing this because I use a password manager and I figured it was ...
8
votes
2answers
3k views

Role Based Authorization vs. Claim Based Authorization

What is the difference between "role based authorization" and "claim based authorization"? Under which circumstances would it be appropriate to implement each of these authorization models?
3
votes
1answer
262 views

Theory about split data in several isolated (different physical server) DBMS to gain in security?

Suppose the following scenario: 1- A web app (on WEBSERVER1) and its database (on DBMS1) having very sensible information deployed in the same physical server (lets said that for simplification). ...
3
votes
1answer
186 views

pro and cons of having 2 Identity providers

My company has applications on cloud and intranet. Also, we have various roles such as employee, customers, partners etc. We would like ID federation between services hosted on public cloud and ...
1
vote
3answers
278 views

Should WS-Fed, Mozilla's Persona or OpenID ever be used with a Banking application?

Most banking sites I've seen use a sign in process that is proprietary, or otherwise won't integrate with an external IDP. Should banks offer integration with services like OpenID, WS-Fed, or ...
1
vote
1answer
706 views

authorization vs federation vs entitlement

I am vague among the three following terms: authorization, federation, entitlement (as stated by the OpenAM product: OpenAM provides open source Authentication, Authorization, Entitlement and ...
3
votes
1answer
171 views

What are the benefits of federated identity management over bare bones public key encryption?

What are the main reasons for having a federated identity system such as OpenID over having identities based purely on a public key? OpenID uses an Identity Provider to confirm that a user owns a ...
4
votes
2answers
363 views

Shibboleth user attribute encryption

How does Shibboleth guarantee that 3rd parties do not get access to user attributes contained in SAML 2.0 assertion exchanged between IdP and SP? Is it correct that all user attributes are encrypted ...
5
votes
2answers
578 views

Combining capability-based access control with SAML

I have been looking into various research on identity, PKI and access control trying to boil it down to a simplified methodology for IAM (Identity & Access Management). One thing which pops up in ...
11
votes
1answer
1k views

What encryption prevents the tampering of Windows Identity Foundation (WIF) FedAuth cookies?

It occurred to me that the WIF FedAuth cookies contain identity information, that if tampered with, could permit someone to assume the identity of another user. Fortunately, WIF does ...
16
votes
2answers
1k views

Essential things to think about before outsourcing authentication with OpenID, OAuth, or SAML

It's clear there there is no consistent set of features among any of the popular authentication providers. Below is an attempt to aggregate the similarities and differences I've noticed, but I ...
1
vote
1answer
279 views

What risk can untrusted WS-Federation metadata pose?

I'm adding support for SAML/ADFS/Azure ACS and read that untrusted metadata poses a risk. Considering that ADFS does background refreshes of the metadata, as do some RPs, can someone explain the ...
19
votes
3answers
5k views

What are the main advantages and disadvantages of webid compared to browserid?

What are the main advantages and disadvantages of webid compared to browserid? This question is inspired by this answer which got a number of upvotes despite being very vague on the topic of that ...
39
votes
5answers
7k views

What are the downsides of BrowserID/Persona compared to OpenID/OAuth/Facebook?

Mozilla went live with a new service called BrowserID/Persona (announcement, background). It is intended to replace current single-sign-on solutions such as OpenID, OAuth and Facebook. One advantage ...
3
votes
2answers
793 views

OAuth User revoke token

I haven't read it myself but a colleague told me that the end-user can revoke his/her OAuth token. I searched but I couldn't find enough docs on: is this true / is the end-user the one to revoke the ...
5
votes
2answers
1k views

How does openid implement Single sign on?

I'm wondering which security model is behind the OpenID. Is it anything like kerberos?
7
votes
2answers
456 views

How does external authentication work?

For example, I can log in to stackexchange websites by logging in to external websites such as OpenID, Yahoo, etc. How does this work? How do the websites (SE and Yahoo!, for example) communicate? How ...
15
votes
4answers
259 views

Are malicious relying parties able to abuse OpenID logins?

if I logon with OpenID into a website (crafted by attackers/hackers) I want to know how much damage can they do to me? Are they able to steal my contact info, name, etc (assuming I'm using Gmail ...
5
votes
2answers
2k views

Verify SAML Response is from a Trusted Source

I'm in the process of making changes to my site so that we can be a SAML 2.0 Service Provider. We will be doing IdP initiated SAML with Out-of-Band account federation. My question is this: Given a ...
4
votes
1answer
474 views

How does the “Service Identity” feature of Azure ACS compare (and contrast) to a real IDP?

It appears that the ACS has IDP-style features within the "Service Identities" section. How does the ACS treat these in comparison to a real IDP? What is missing? Some examples I'm thinking of ...
4
votes
2answers
1k views

How do Azure ACS 2.0 security features compare to ADFS 2.0?

I'm configuring my relying party (a website) to use either ADFS or Azure ACS 2.0. ADFS 2.0 has some interesting features such as Token Replay prevention (in the SQL version) and may have other SAML ...
5
votes
2answers
703 views

Storing third-party auth info securely

Suppose there's a multi-user web application that requires access to user's mailbox (on third-party service, like gmail, etc.). This access needs to be persistent. Which means we'd have to store user ...
8
votes
1answer
759 views

What were the specific security flaws with OAuth 1.0? How are they being addressed in 2.0?

I read an article documenting Twitter abruptly pulling its OAuth support back in April 2009. The article said it wouldn't specify the hole for security reasons, but mentioned "social engineering" is ...
19
votes
3answers
382 views

Isn't openid with http an issue?

Many openid enabled sites default to http identifiers, even if the openid provider supports https (such as myopenid.com). Does this pose a threat beside the identity being exposed? The second step of ...
2
votes
2answers
199 views

How does LiveID work? Is there any documentation on the LiveID provisioning site msm.live.com?

I'm trying to learn details on how LiveID works, when compared to other federation technologies. To be honest, I'm a bit overwhelmed by all the options at https://msm.live.com/ and want to understand ...
3
votes
3answers
2k views

What is the exact difference between SAMLp and WS-Trust?

They seem to be similar on the surface, but I'm not sure how deep the differences are. Can someone explain to me the difference between SAMLp and WS-Trust? ADFSv2 gives me a choice between these ...
0
votes
1answer
643 views

How can I decrypt ADFS-based SAML/p or WS-Trust claims?

I'd like to audit the claims that are sent to a client from a SAML/p or WS-Trust authentication. What private keys do I need and how would I decrypt this information? If it makes any difference, I'm ...
22
votes
4answers
575 views

How does using OpenID affect webapp security?

Using OpenID for authenticating users grows in popularity and, in fact, makes a webapp easier to use. But what are the security considerations one should bear in mind when deciding whether to ...