Tagged Questions

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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0
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2answers
107 views

SSL/TLS Question [closed]

I am currently working on my SSL/TLS assignment and I got a question to ask. What is the use of a login password since it is not needed for establishing secret communication between your computer and ...
3
votes
1answer
638 views

OWASP Recommendation on Client-Side Password Hashing

The OWASP Application Security FAQ recommends the use of JavaScript to produce a salted hash of the password client-side with JavaScript prior to sending it to the server. Is this something truly ...
4
votes
3answers
876 views

In what ways does increasing SSH host key length increase security

I have read on a few guides on "how to secure SSH servers" that it is a good thing to increase ServerKeyBits from the default of 768 to 2048. Most of these guides seem to be for the entry ...
0
votes
2answers
159 views

how to store key securely [duplicate]

I will receive some secret key from server which I will use as an authentication key for a MAC function in the future. But my question is how do I store this key securely on my machine? Will I have to ...
6
votes
2answers
2k views

How reliable are device IDs provided by PhoneGap on Android and iOS?

I have a web application that allows users to add mobile devices to their accounts (using mobile app). Each device is uniquely referenced by its UUID. Mobile client is developed using PhoneGap, so ...
32
votes
2answers
2k views

Why does Google cripple the 2FA Google Authenticator PAM module?

If you enable 2FA for Google Apps the shared secret is 160 bits. The google_authenticator PAM module on the other hand seems to use 80 bits for the shared secret. According to RFC 4226: R6 - The ...
2
votes
1answer
243 views

How do I ensure secure communication and inter-process authentication in a multi-server application

Note: Question updated to narrow the scope a bit. Scenario Client <-> Application server <-> Data server Users use the client to connect to the application server and build queries for ...
2
votes
1answer
152 views

A problem with the cookie theft detection mechanism of Barry Jaspan's Improved Persistent Login Cookie scheme

I have read this article http://jaspan.com/improved_persistent_login_cookie_best_practice i intend to implement cookie theft detection mechanism Barry Jaspan devised in it. but a problem seemed to ...
2
votes
2answers
200 views

Authentication for external applications

I need to design an application for internal corporate use. The application must be hosted externally. Ideally I'd like that application to be able to authenticate and authorize against the corporate ...
1
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0answers
450 views

Safe communication via rest api between two known servers

i would like to have some advice on the following scenario: I'm using kinvey as backend but because it doesn't provide the ability to run custom code i have set up another server. So basically when x ...
5
votes
2answers
293 views

Can I trust large companies like Google not to store failed password attempts?

Let's say, for example, that I accidentally entered my Microsoft account password instead of my Google account password when logging in to some Google web service. After getting an error message, I ...
1
vote
2answers
650 views

What is it common to only say “username or password is incorrect” in case of login errors? [duplicate]

When logging in to a site with wrong user/password credentials, the displayed error is most generally a generic "username or password is incorrect". Looking into some PHP code that handles such login ...
2
votes
1answer
990 views

Android access tokens and access to all google services

My questions is based on the asnwer on that question: Can the Gmail password be recovered from the Android Gmail app? So, as I understand when we setup google account on Android devices, it stores ...
8
votes
3answers
3k views

Is HTTPS and Basic Authentication secure enough for banking webservices (RESTful)?

I have been reading about SSL/TLS for the last few days and looks like it has never been practically cracked. Given SSL/TLS is used for all communications between client application and the server, ...
3
votes
2answers
1k views

When do you use OpenID vs. OpenID Connect

Can they be used together? ....or are they two separate protocols that may or may not be useful depending on the context? The reason I ask is because I'm trying to implement the following: User ...
1
vote
4answers
376 views

How to figure out who is pummeling my WP install with bogus login attempts

I have a WordPress install which uses the plugin Wordfence. I set Wordfence to block the IP of anyone trying to log in with a non-existent username. For several months now, I have been getting many ...
1
vote
0answers
50 views

What's The Easiest Way To Maintain Remote Users Access to a Webapp

Here is a real world case: A chain of high schools (several hundreds) has many websites (~ 3x number of Schools) that are content driven by users (the students). Every school maintains about 2-4 ...
12
votes
2answers
6k views

Difference Between OAUTH, OpenID and OPENID Connect in very simple term?

I am very confused the difficult jargon available in web about OAUTH, OpenID and OPENID Connect. Can anyone tell me the difference in simple words.
2
votes
3answers
268 views

Message authentication code based on a single AES block

I think I need to use a MAC for ensuring the integrity of a URL that my system will provide to an end user that will use it to download a content from another component of the system, i.e., an URL has ...
1
vote
0answers
156 views

Routing Protocol Encryption

As far as I know 'newer' versions of routing protocols support authentication between routers. What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which ...
1
vote
1answer
123 views

Is using an old Android phone for 2-factor authentication safe?

I apologize in advance if this is the wrong place to ask this, I didn't know a better place to start. I have a rooted HTC Hero (CDMA) that is no longer receiving service and is just kind of...sitting ...
1
vote
4answers
131 views

Are there any web services which use any other form of authentication, than passwords? [closed]

Out of curiosity and interest I was wondering if anyone had come across any web based services which offer users other forms of authentication, other than the standard password or PIN? Or if ...
4
votes
3answers
2k views

Safe to expose Active Directory via LDAPS externally?

We currently access Active Directory via LDAPS internally for authentication and user data retrieval. Is it common, or safe, to expose this publicly over LDAPs? Addendum 1: Our business case, ...
3
votes
1answer
1k views

What are the risks posed by “pass-through authentication” and how are they mitigated?

Related: Local Admin has Domain Admin rights "Pass-through authentication" on Windows systems allows for the possibility for user accounts with the same name and password to impersonate one ...
1
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1answer
254 views

Local Admin has Domain Admin rights

While installing a new XP machine that had not been connected to the domain I was browsing to a UNC path and was not prompted for authentication. I then went to the different mapped drives and found ...
1
vote
3answers
249 views

How safe is it to provide my administrator account password for a 3rd party software: EasyUS Todo Backup?

I've been recently searching for a backup solution for my Windows desktop. That's when I came across this free software called EasyUS Todo Backup. (I know it's a mouthful but English doesn't seem to ...
5
votes
3answers
1k views

Is it possible to use a GPG or SSH key for web based authentication in a secure fashion?

Let's say hypothetically I am writing a web application targeting technically inclined, security-conscious users who have no problems generating and using GPG or SSH keys. Is it possible to use said ...
1
vote
1answer
493 views

Additional security for WebRTC/DTLS-SRTP with PGP?

I am having a thought experiment. Can you help me? Two clients who both use PGP. They initiate a WebRTC call using DTLS-SRTP via a 3rd party server. Is there any benefit of encrypting, via their ...
0
votes
2answers
707 views

mutual authentication between two clients

I understand how mutual authentication works between a client and a server, however I am unsure how I would be able to get mutual authentication between two clients A and B? What would be the best ...
1
vote
2answers
181 views

Does this show the need for a two-factor authentication?

I need some help for my understanding while reading through this authentication scheme in WEP. In a WEP authentication scheme, the station first sends a request for authentication. However, this ...
0
votes
1answer
73 views

Payload authentication + HW-SW Binding

I want to authenticate a (2nd stage) bootloader during the boot process using a symmetric key, which is derived from HW properties of the platform the bootloader is running on. Thus, I want to bind ...
8
votes
3answers
6k views

How secure is Android's facial recognition?

Android supports using facial recognition for unlocking your phone. How secure is that mechanism? For instance, if someone has a good quality picture of your face, can they defeat the facial ...
1
vote
1answer
92 views

Certificate Mapping in IIS

When pasting the certificate blob in the configuration editor in IIS 7.5 for one on one authentication, is this the server certificate or the client certificate?
1
vote
3answers
193 views

Are subdomains a cure for phishing?

Seeing as phishing is getting more popular and users are becoming less concerned about security, I am trying to come up with a solution for a new site of mine that can stop phishers. For instance, any ...
1
vote
1answer
881 views

How can a gmail recipient open email in two different countries, at the same time?

I sent an email to person in Russia, and tracked it with Right Inbox, when the email is opened I get notified. The problem is I get 2 different IP addresses, one in Russia, and one in the US, both ...
4
votes
2answers
585 views

Is HTTP Digest + MD5 still an alternative to consume my own api?

I'm reading a lot about implementing security constraints to a REST API. There are a lot of methods, some better than others for 3party applications or to consume my own API. HTTP Basic + TLS (with ...
3
votes
4answers
372 views

Key-agreement protocol in a REST API

I have a C# REST API which exposes some methods over the HTTP protocol. The API is intended to be used my my Android applocation (Java) which is currently in the makings. Since the app is in an early ...
4
votes
1answer
297 views

Oauth Consumer Secret?

Using OAuth you have a consumer key and consumer secret to identify your application and the user provides an OAuth access token and secret to authenticate your application access to their account, ...
1
vote
1answer
228 views

How to write an authentication module for my website?

This will sound naive for sure, and it is. Being a recent college graduate, I have been wondering on how do average websites implement their authentication modules. I have been using a table storing ...
4
votes
2answers
115 views

Is there a security advantage to requiring a user id instead of just /me in an api request?

Is there a security advantage to requiring a request to conform to /api/1234 instead of /api/me? Both would obviously have access tokens. My guess is that api/1234 is more secure because if someone ...
3
votes
2answers
311 views

Totally secure public key distrubition

Public-key cryptography secures communications provided that you use pre-shared public-keys. The problem is how to share these public-keys while maintaining authenticity? How can we be sure that ...
0
votes
1answer
173 views

Corrupt password being pulled from wireshark data?

Hello everyone, I currently have a pcap file that contains an unencrypted Telnet session, and when I trace the TCP stream the password is in a format like so: pas...ord (please note ...
4
votes
3answers
402 views

Using GET to submit username/password? [duplicate]

From what I understand using GET to submit usernames/passwords is a security issue because the username/password are part of the URL which can show up in browser history. Is this still an issue if ...
0
votes
2answers
135 views

Is it secure if we purchase through a website that is loaded in iframe

I found one of the website is loading all shopping websites in their own domain. Eg . www.domain.com having links like , www.shoppingsite1.com , www.shoppingsite2.com ,www.shoppingsite3.com ...
6
votes
2answers
3k views

Best way to allow sudo access when using ssh keys

Probably a simple question, but I can't seem to find any actual best practices out there. I manage a handful of servers and I am really getting sick of tracking my passwords in pwsafe. I've been ...
20
votes
6answers
8k views

Could SQRL really be as secure as they say?

I just came across https://www.grc.com/sqrl/sqrl.htm With Secure QR Login, your phone snaps the QR code displayed on a website's login page . . . . and YOU are securely logged in. This ...
2
votes
1answer
76 views

Authentication of support engineers on client systems

Are there any good methods for authenticating that a user is a maint engineer, or at least trusted enough to use the maint access? The environment is code that is running in client sites, without ...
2
votes
1answer
313 views

Communicate between two sites both with SSL

I now have two websites - site A and B, both with SSL-certificate, and they have exact same users. So when a user log into site A and click the link to site B, I want to make him auto log in to site ...
2
votes
1answer
595 views

Which products are affected by NSA's ability to crack pseudo-random-number generator Dual_EC_DRBG? [closed]

After reading this article about RSA advising its customers not to use the default random-number generator in its encryption products - amid fears spooks can easily crack data secured by the ...
0
votes
2answers
966 views

Google Authenticator - Counter Based [duplicate]

I'm trying to understand How google authenticator - counter based work. I have tried googling around finding a demo or at least how this work. I understand its a one time password but not like TOTP. I ...