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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4
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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, ...
22
votes
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 ...
0
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0answers
18 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 ...
3
votes
1answer
55 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 ...
4
votes
2answers
665 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 ...
1
vote
0answers
17 views

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 ...
2
votes
2answers
71 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 ...
4
votes
2answers
119 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....
-1
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1answer
241 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 ...
0
votes
1answer
46 views

How to configure SSH public key per user?

I have an OpenSSH server running and different users can log into it with different privileges. I know you can enable public key authentication and place all the allowed public keys in the ...
2
votes
1answer
34 views

Understanding the security of a federated public key scheme using WebCrypto

I am proposing this scheme for federated authentication and WebCrypto. I am not sure if something like this (or better) exists, please do send me related material. Entities Alice's Browser, BROWSER ...
-1
votes
5answers
181 views

Is it possible to bypass two step authentication process?

Is it possible for a hacker to bypass two step authentication process if the hacker has no physical access to my phone?
2
votes
2answers
97 views

For 2FA, is one method better (more secure) than another?

There are a variety of options available for 2FA - LastPass, for example, offers all of the following options: LastPass Authenticator Duo Security Authentication Google Authenticator Yubikey ...
2
votes
3answers
3k views

AD User vs SQL User for SQL Server Authentication

My company has multiple web applications that we deploy to customer sites. Often the customer has the final say in deployment options in which often it shocks me. Many of these customers are ...
4
votes
1answer
68 views

How can I be sure if a webview in a desktop app shows the real web page?

When installing Postman (on Mac), you can log on using your Google account. For this, the logon view from Google is shown in a window (A kind of Webview I assume). How can I be sure this is the real ...
2
votes
1answer
167 views

Authenticating a ciphertext

What can be considered as a downside of authenticating a ciphertext? For example, can we say a drawback of authenticating a ciphertext is that we lose repudiation, for example, we can't prove to the ...
1
vote
1answer
100 views

TLSv1: Reason for client not sending client certificate

Our BizTalk installation consists of two load balanced nodes B1 (10.137.10.1) and B2 (10.137.10.2) which process and route incoming SOAP messages. The processing is nothing more than: sending the ...
16
votes
3answers
603 views

What email addresses are treated as trusted?

Windows Live recently suffered a security incident because they didn't realize that email addresses like administrator@live.fi are considered "trusted": some certificate authorities will consider ...
0
votes
0answers
34 views

Best practice regarding secure administration on lots of embedded Linux devices [duplicate]

Lets say I've a lot of embedded Linux devices, like 100. How do I access and administer these devices securely? Is it best practice create a key pair and put the put the public key on all the devices?...
3
votes
3answers
104 views

How does Single Sign On limit phishing risk

I was reading this article about SSO benefits and this sentence intrigues me : Can reduce phishing – Phishing, a fraudulent process where victims are tricked into giving away sensitive user ...
3
votes
2answers
84 views

Useless 2FA in case of inside attacker

Suppose a server-side signing scenario, where user keys are generated in a HSM and exported to a database, encrypted with a symmetric key derived from a user password and HSM's master key. To sign, ...
3
votes
2answers
128 views

Is it secure: unsecured Wi-Fi + social network authentication to access the web?

Recently I visited my dental office and noticed a Wi-Fi configuration I haven't seen before. First, there is unsecured (no password) Wi-Fi, but I cannot surf the web yet. I am redirected to a webpage ...
2
votes
0answers
18 views

Secure userserver authentication with authserver

So, lets say we have Bob, Alice and Peter. Peter is trusted by Bob and Peter has an authserver. Bob hosts a userserver and Alice wants to connect to Bob over an insecure channel. But Bob needs to know ...
1
vote
1answer
41 views

Secure multiserver authentication

I was reading answers in How to split login and game logic when writing servers?. Read that first. Now, I want to know whenever this method will work and how can it be broken. I think there might be ...
5
votes
2answers
982 views

Why is whatsapp using 6 digit codes for verification?

My question is kind a simple. Why does whatsapp use 6 digit codes to verify the device? They could also use 5 or 7+ digits and or alphanumeric characters. Are there any reasons they chose exactly 6?
3
votes
1answer
53 views

Smartcard authentication SSH remote client

I want to use smartcard authentication for my SSH sessions. Now sometimes I want to use a ssh client within a ssh session. So this situation: My desktop computer with smartcard has a ssh session to ...
-2
votes
3answers
72 views

What safeguards are taken when a login system only requires a PIN and no username? [closed]

The gym I go to gives its customers access to the building by giving them a 6 digit PIN code which they must type in on a keypad when they want to enter/exit the gym. Does the person who was added ...
1
vote
1answer
59 views

Why mobile phone app sessoins are never timed out?

This question talks about the session time out for web applications. I have noticed that most mobile phone apps I use never ask me to login again after the first login. These mobile apps call web ...
-1
votes
1answer
35 views

How to implement security with Azure Mobile Services Back-end?

I have a mobile application which relies on a Windows Azure Mobile Services Back-end. I want to tie down some security vulnerabilities. For example, someone can currently access all my records, modify ...
7
votes
2answers
138 views

Why not make the second factor the only factor? [duplicate]

Most websites use a single-factor based authentication mechanism, the password. Some popular websites, however, also implement an (often optional) two-factor mechanism to log in; usually requiring the ...
6
votes
1answer
207 views

If I misuse OAuth 2.0 to do authentication, am I at risk?

I understand that OAuth is not an authentication protocol, not authorization one (even if the first paragraph on Google's OAuth 2.0 page disagrees), as well as that: [...] authorization can be ...
0
votes
1answer
55 views

How to connect to Windows RDP and delegate authentication to a (reverse) proxy?

Looking for the following setup: Client connects to Windows RDP server through proxy server. The client is in public network hence can't send username/password for logon. The proxy server in between ...
30
votes
4answers
207k views

How do I clear cached credentials from my Windows Profile?

Windows seems to be saving my credentials for a variety of applications (terminal servers, etc) and I'd like to purge this data. How can I backup and purge this data?
0
votes
0answers
26 views

bundling session information in a binary

We are in the process of developing a desktop app. When a user is logged into the website we create a dynamic binary(.exe) and add session information to that binary which is valid for one time login. ...
1
vote
1answer
19 views

What should I watch out for when using pam_ssh_agent_auth?

I got tired remembering passphrases for my SSH logins and heard about pam_ssh_agent_auth. Unfortunately I hadn't found any security audit of it and I don't know enough low-level details about SSH to ...
0
votes
0answers
11 views

Does PKCS 1.5 padding make it possible for an attacker to extract the private key or not? Is PKCS 1.5 safe to use in authentication context?

Im currently writing a authentication app based on RSA, for Android that should be impossible to copy, even if you have physical access to a phone without lockscreen/PIN. However, the HSM inside the ...
0
votes
0answers
31 views

Is any encyption used for EAP-TLS certificate exchange?

I was reading about the EAP-TLS and mutual client - server authentication using digital certificates. In the authentication process explained in RFC 5216, both server and client exchange ...
0
votes
1answer
49 views

How can I test my SSO connection without having access to the Identity Provider?

I'm trying to set up an SSO connection using Auth0. My app is set up as the Service Provider (SP), and it needs to work with PingFederate as the Identity Provider (IdP). I don't have access to an ...
1
vote
1answer
76 views

Is using dynamic obfuscation and peppers for password hashing a good idea?

I've read now the whole day about password hashing and secure authentication and though I read very often that mostly every own algorithm makes the proven hashing methods just less secure, I just got ...
-8
votes
1answer
180 views

Sign In vs Log In [closed]

Using Web apps, I started to believe that these are synonyms. But, suddenly, at the bottom, developing a web app, I received the following response from a Google server: {"google_logged_in":false,"...
6
votes
2answers
172 views

How does Google store passwords for remote IMAP/POP services?

It is possible to add non-Google accounts to Gmail and retrieve their mail messages via POP or IMAP. As part of the setup process, one has to provide the login username and password for these accounts....
3
votes
3answers
80 views

Additional confirmation for online bank payments

Nowadays, when someone is making an online payment, the associated bank often requires an authentication step. As far as I know, there are mainly two ways to do this: SMS Verification. The Bank ...
1
vote
1answer
141 views

Does SAML 2.0 define how to pass username and password for authentication?

I'm aware of how SAML is used for single sign on (SSO). That is, redirection to IDP from SP and getting the user's identity from the SAML response/assertion. My question is: Does SAML 2.0 ...
0
votes
0answers
16 views

Password Managers — Generating Passwords On The Fly a Safe Approach? [duplicate]

Most password managers store user credentials for individual services encrypted on their own back-end databases, so that your passwords are available on multiple devices. So, a DB compromise on these ...
1
vote
1answer
80 views

Pro's and Con's of current 2-step-verification processes?

I am currently working on a project, and we are exploring different types of current industry MFA standards. The most known ones would most likely be HOTP & TOTP pins, which are used in the '...
1
vote
3answers
267 views

why don't we store passwords in a database using encryption instead of hashing? [duplicate]

hashing is a one way method, if a user lost his password he will never be able to get that password from the server, so why don't we store passwords in a database using encryption instead of hashing?
87
votes
12answers
12k views

Is a 6 digit numerical password secure enough for online banking?

My bank went through a major redesign of their customer online banking system recently. The way security is managed across the platform was also reviewed. The password I am able to set now to log in ...
1
vote
1answer
181 views

How Google Authenticator in Android mobile identifies this is the right SSH server?

I am new to Google Authenticator mechanism. I have gone through the basics of mechanism but I couldn't understood the logic behind it to make a connection to the Linux machine. I have a Linux machine ...
1
vote
1answer
125 views

Everykey (Bluetooth master key) - is it really secure? [closed]

Obligatory disclosure I have no relation to the Everykey company and do not mean to promote them in any way. I came across the product Everykey that claims to be "your only key" by allowing you to ...
0
votes
2answers
101 views

Smartphone 2FA has been broken?

This research states that two factor authentication has been broken by the possibility to remotely install an app on a device. I believe that an attacker can publish an app in the store that is ...