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NEW QUESTION: 1
Which of the following about VPRNs is FALSE?
A. A PE maintains a separate forwarding table for each VPRN.
B. The service provider manages the customers IP addressing.
C. A VPRN is a Layer 3 service.
D. Multiple VPRNs can be deployed over the same IP/MPLS network infrastructure.
Answer: B
NEW QUESTION: 2
A. Cardholder Unique Identifier (CHUID) authentication
B. Asymmetric Card Authentication Key (CAK) challenge-response
C. Physical Access Control System (PACS) repeated attempt detection
D. Personal Identity Verification (PIV)
Answer: C
NEW QUESTION: 3
A bank is in the process of developing a new mobile application. The mobile client renders content and communicates back to the company servers via REST/JSON calls. The bank wants to ensure that the communication is stateless between the mobile application and the web services gateway.
Which of the following controls MUST be implemented to enable stateless communication?
A. Require SSL between the mobile application and the web services gateway.
B. Generate a one-time key as part of the device registration process.
C. Authentication assertion should be stored securely on the client.
D. The jsession cookie should be stored securely after authentication.
Answer: C
Explanation:
JSON Web Tokens (JWTs) are a great mechanism for persisting authentication information in a verifiable and stateless way, but that token still needs to be stored somewhere.
Login forms are one of the most common attack vectors. We want the user to give us a username and password, so we know who they are and what they have access to. We want to remember who the user is, allowing them to use the UI without having to present those credentials a second time.
And we want to do all that securely. How can JWTs help?
The traditional solution is to put a session cookie in the user's browser. This cookie contains an identifier that references a "session" in your server, a place in your database where the server remembers who this user is.
However there are some drawbacks to session identifiers:
They're stateful. Your server has to remember that ID, and look it up for every request. This can become a burden with large systems.
They're opaque. They have no meaning to your client or your server. Your client doesn't know what it's allowed to access, and your server has to go to a database to figure out who this session is for and if they are allowed to perform the requested operation.
JWTs address all of these concerns by being a self-contained, signed, and stateless authentication assertion that can be shared amongst services with a common data format.
JWTs are self-contained strings signed with a secret key. They contain a set of claims that assert an identity and a scope of access. They can be stored in cookies, but all those rules still apply. In fact, JWTs can replace your opaque session identifier, so it's a complete win.
How To Store JWTs In The Browser
Short answer: use cookies, with the HttpOnly; Secure flags. This will allow the browser to send along the token for authentication purposes, but won't expose it to the JavaScript environment.
Incorrect Answers:
A: A one-time key does not enable stateless communication.
B: SSL between the mobile application and the web services gateway will provide a secure encrypted connection between the two. However, SSL does not enable stateless communication.
C: A cookie is stateful, not stateless as required in the question.
References:
https://stormpath.com/blog/build-secure-user-interfaces-using-jwts/