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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Authentication Middleware

We run a large distributed system consisting of a number (>10) of Django-based web services and web applications with a consumer base of about 10000 university students. Currently, we use a single ...
43
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5answers
8k 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 ...
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5answers
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What are the advantages of multi-level authentication?

By multi-level authentication, I am referring to the fact that the user makes use of a primary username password keypair to log into his account. Then, to perform some other actions, such as authorize ...
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22 views

Hosting CSRF Token at URL

When implementing CSRF protection, one generally uses a CSRF cookie that must be included in the body of the request. This prevents CSRF attacks because the malicious website cannot read the other ...
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4answers
44 views

How are salts safe in the database? [duplicate]

I have read many and many of this type of question on the security stack community before I asked this question, but one thing that made me mad about salts and saving it in database is this ... I will ...
34
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4answers
21k views

Demystifying Web Authentication (Stateless Session Cookies)

I'm currently researching user authentication protocols for a website I'm developing. I would like to create an authentication cookie so users can stay logged in between pages. Here is my first bash:...
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0answers
7 views

JWT vs. Client Certificates

We have a transaction server that is connected to by different client applications. The requirement is to have a secure means of authentication for client applications to communicate with the ...
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0answers
134 views

Social game authentication exploit

We're running a popular social game and we have a security problem that is growing more and more popular these days. We have the following product requirements: There should be no registration to ...
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1answer
43 views

Should all web applications implement a security feature that stores historical passwords? [duplicate]

In addition to Is it safe to store a password hash history for preventing user to keep same password repeatedly in some cases?. Facebook, and other companies, are storing historical passwords of ...
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1answer
98 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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3answers
180 views

How to protect WordPress from brute-force attacks?

One of my WordPress sites is being constantly attacked with brute force. I have the WordFence and Clef plugins installed. The number of login attempts is limited to just one. The password is very ...
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0answers
12 views

Digital Signature on a Passive RFID tag with small-ish memory constraints

I'm pretty new to the crypto and security worlds and I'm looking for some guidance. Briefly, my project involves Widgets (physical items that need to be authenticated) and Gadgets (physical machines ...
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3answers
51 views

How does a Safenet eToken Pass(hardware token) generates OTP and based on which algorithm? How does authentication takes place against it?

I use hard token to login to a VPN but I don't get the concept behind it.The password is combination of a self generated PIN + OTP generated on eToekn Pass. How do authentication takes place at back ...
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2answers
114 views

Should users be allowed to reuse/recyle the same login credentials across a network for different systems?

Should users be allowed to reuse/recycle the same login credentials across a network for different systems? Should this be disallowed/discouraged, or are the security implications minimal? If it's ...
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2answers
90 views

How secure is the hashing/salting/stretching process as described in this diagram?

Question I was just brainstorming about the hashing, stretching, salting part of the user password in the authentication process and I want it to be as secure as possible (no matter how paranoid that ...
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1answer
20 views

does openssh support authentication using public key fingerprints?

Cisco have two ways of enabling public key authentication: using the public key and using the public key hash. ip ssh pubkey-chain username <user> key-string <public key> OR ...
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2answers
61 views

Is CHAP authentication still secure?

Assuming the use of the default hashing algorithm MD5, is CHAP authentication still secure? I appreciate that MD5 is considered broken in terms of collision resistance, but I also understand that in ...
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3answers
13k views

How are “security levels” of identities in TeamSpeak 3 implemented?

TeamSpeak 3 VoIP communication system uses a concept of so called identities to identify the client to the server. These identities are basically public/private key pairs. In order to prevent people ...
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1answer
78 views

How exactly are physically unclonable functions used in authenticaton if they are unclonable?

There is ongoing and quite promising research with prototypes presented about using physically unclonable functions (PUFs) in authentication. If they are practically unclonable, how is a PUF-based ...
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0answers
12 views

Mutual authentication between devices [on hold]

I have clear understanding of mutual authentication and I'm now trying to implement it just for testing purposes. Here is my scenario: I have a Linux machine A which acts as a self-signed CA. Now ...
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1answer
28 views

REST API security mobile application with PIN

I am looking into writing an API that will be accessed by mobile devices (We also own the mobile application, there are no 3rd parties involved). As part of the login flow we have been instructed to ...
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0answers
17 views

Application specific password tools/papers?

We have our users/groups managed by an LDAP system. We would like to move away from logins to all internal systems using the main LDAP password but still want to centrally manage user accounts. We ...
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3answers
89 views

What security does the new option for two factor authentication that Google offers enforce?

Google has announced a new option for two factor authentication - a popup message. How does this improve security?
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31 views

Out source Authentication Service with PIN [closed]

I'm working on a mobile application project that requires PIN authentication. The majority of external services we have reviewed are your typical Email / Password authentication. The only PIN ...
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1answer
57 views

Any scenario for using both, OpenID Connect and OAuth 2.0?

Since OpenID Connect builds on OAuth 2.0, I am assuming that everything that is possible with OAuth 2.0 is also possible with OpenID Connect. In particular, say that my website stores some ...
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2answers
2k views

“Extended Protection” primer and implementation guide to prevent MITM

Extended Protection (link) (link) is a feature in Windows 7 and Windows 2008 R2 that prevents certain MITM attacks. Does anyone have a primer (or explanation in plain English) what this feature is, ...
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2answers
170 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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4answers
9k views

Google Account: implications of using application-specific passwords

In the wake of the recent Mat Honan story I decided to try out two-factor authentication on my Google account. But in order to keep using it with Exchange, the Android OS, Google Talk and Google ...
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16 views

Mifare cards authentication

I have few questions about Mifare authentication: 1) Can you confirm me that the authentication between the reader and the tag is as follow: the reader send the correct key to the tag for the sector ...
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1answer
106 views

What scenarios really benefit from signed JWTs?

UPDATE: I have concluded my research on this problem and posted a lengthy blog entry explaining my findings: The Unspoken Vulnerability of JWTs. I explain how the big push to use JWTs for local ...
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1answer
47 views

PIN Entry via HTML rendered Keypad

I have a web application that replaces a non-web predecessor. A low level set of users accessed basic functionality with touch panels in the non-web previous version of the product with the touch ...
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2answers
659 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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0answers
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How strong is the state-of-the-art in real-world “implicit authentication” systems?

Years ago, I read a paper about how mobile devices made it possible to authenticate users without entering a password, simply by relying on behavior, habits, locations. Now, the DoD plans to use such ...
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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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270 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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2answers
65 views

Periodic password change needed when using 2-step verification?

I know that it's considered good online security hygiene to change one's login passwords every 6 months or so. Is that needed on sites with 2-step verification? Isn't the 2nd step what will keep my ...
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1answer
94 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 ...
2
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3answers
141 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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1answer
151 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 application(...
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2answers
287 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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1answer
58 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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1answer
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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 ...
4
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2answers
97 views

Time Based Authentication Verification Token

I'm building a long-lived session system which requires that users verify their authentication before performing "dangerous" operations, such as changing critical settings, deleting their account, etc....
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2answers
88 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 ...