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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2answers
820 views

How to completely password protect login into Ubuntu 12.10?

I am running Ubuntu 12.10 on my laptop and I would like to make a set up such that without a login password, no one would be able to login into my system. Currently it seems that one can, quite ...
2
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2answers
99 views

Authentication vs. Verification in General and with Biometrics

I am reading The Basics of Information Security, 2nd. Ed., Andress, Jason. He says on p.25, "Identity verification is a step beyond identification, but it is still a step short of authentication, ...
2
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1answer
89 views

Global user override - Uncomfortable

We have recently started a project with a service provider who is a little old fashioned in their ways. They provide a product but don't market it particularly well, so we (as users of the product) ...
3
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2answers
889 views

Secure REST API and Single Page App by using external OAuth 2 Authorization Code

I am trying to understand how to implement an OAuth 2 Authorization Code flow when having both a single page JS app and a REST API. The aim is to secure access to the REST API by offloading ...
2
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6answers
1k views

Does Username + Password + Pin improve login security?

I've been asked to add a feature to a website to require a pin for users. The site currently uses username and password. If a user wants to change their password they need to supply the current ...
3
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3answers
119 views

Is an emailed PIN for 2FA worthwhile?

To log in to our web app, our security team is insisting on 2FA as it is hosted on our internal network. The proposed solution is to have a standard username (email address) and password login, which ...
3
votes
2answers
169 views

How safe is to secure sensitive content by URL with MD5 hash and no other authorization?

Suppose we have website that use MD5 hash in URL like this: http://somewebsite.com/XXX/ where XXX is MD5 hash. Content of this website may have sensitive information like transaction details with ...
0
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0answers
67 views

Security considerations for RESTlike HTTP API of an embedded system

I'm designing a HTTP service for an embedded device and wondering if the following security concept is good enough: SSL(Up to Version 3) is enabled by default, TLS is not by limitations of the ...
0
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1answer
78 views

Secure log in without sending plain test to server

I know this question asked so many times, but here I am again with it. I am working on an application in which I need to log-in users but the question is it is not a good Idea to send user credentials ...
13
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8answers
5k views

Two-Step vs. Two-Factor Authentication - Is there a difference?

These days, there's pretty much three forms of authentication in general use on the web: Single-factor authentication, e.g.: PIN or password. Two-factor authentication, e.g.: Single-factor plus a ...
0
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1answer
85 views

Securing login form in a desktop app

I currently have a desktop application which requires the user to have a username and a password. These credentials are stored on a webserver (myserver.com), so when he types the username and the ...
3
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2answers
106 views

One time passwords using Mobile phones [closed]

It is safe to assume that the majority of users accessing the internet also possess the mobile phones. So can we take advantage of this and relieve users of remembering any passwords. Instead of ...
0
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4answers
210 views

Security of a Random Password

i. If I choose random password of length say 15 from the alphabet set of size 94 i.e. from the search space of 94^15, is my password protected against all kind of threats? ii. Will there be any need ...
0
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0answers
60 views

Is this login flow via an authenticated email account safe?

I want to have users log in by entering an email, and then proving that they control that email. I only care that they do control the email, and so want to avoid add another password to the process if ...
1
vote
1answer
44 views

Verification code generation and expiration

I am trying to implement an application that includes registration, In order to register to the system the user shall enter his organization ID number let's say. To verify the user identity, a ...
21
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3answers
3k views

What are the disadvantages of implementing HTTP authentication in a web application? [duplicate]

I know that there are different types of authentication mechanisms available. One among them is the HTTP authentication. What is the danger in using this method compared to other methods?
0
votes
1answer
103 views

Idea for an algorithm to authenticate users with zero-knowledge-proof [need thoughts/review]

I have an idea for an algorithm. I don't know if I made any mistakes and need some extra thoughts/peer review on it. This would work as an (almost)zero knowledge proof for sending passwords that can ...
3
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3answers
1k views

OAuth2 - Resource Owner Password Credentials grant

The OAuth2 spec describes the Resource Owner Password Credentials grant type and authorisation flow here. I understand that only 'trusted' client applications would be allowed to use this grant, for ...
17
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1answer
97k 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?
52
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10answers
12k views

Can I scratch off the magnetic strip off a debit card to only allow chip and PIN?

I have been robbed in the past by thieves using my HSBC Debit Card (issued by UAE branch) to purchase mobile phones and accessories by signing for the purchases. While the card has chip & PIN ...
0
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0answers
35 views

drupal external authentication - how to handle password?

I need to implement an architecture someone else designed. They have a drupal as user interacting component, and an external authentication module. To authenticate, from drupal, username and ...
1
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1answer
148 views

Authentication between two internal servers

I have two internal servers that are going to communicate with each other; they speak HTTP/TLS. Is there a best practice for authenticating communications between internal servers? Short of a best ...
2
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5answers
252 views

Can extra loading times on login attempts be a security threat?

I have a web application built with PHP with a login page where the visitor is supposed to enter his / her account's email address and matching password. Since I'm using the PHP native (slow) hashing ...
0
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4answers
201 views

Isn't it less secure to use something you are for authentication?

I have to think of this everyday when I close the doors of the shop I work in: A year ago we used to close the shop and arm the alarm using a key fob. This means the worst case scenario was that I ...
9
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4answers
246 views

What kind of factor is a physical signature?

I'm familiar with the basics of multi-factor authentication. Now I'm trying to understand how a physical signature, as written on, say, a check or a credit card receipt, would be classified: Is it ...
8
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1answer
1k views

Why would HTTP client only send authentication headers once an unauthenticated request was rejected?

The default usage of HttpClient and HttpWebRequest .NET classes is setting Credentials property and then asking the class instance to perform an HTTP request. If the target requres Basic authorization ...
0
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1answer
106 views

Should I use the root account on my Digital Ocean server?

I have set up an SSH key with Digital Ocean that is automatically added to any servers I create. Is it okay to use this root account for SFTP and daily use or should I create another user account and ...
4
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2answers
187 views

Two-factor verification without a mobile phone?

Currently, some services use a second layer of veficiation if logging in from a new device: Gmail and Facebook send a text or call with a code Facebook generates a code in the mobile application ...
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0answers
47 views

Protecting data on a remote device

Background I have am developing a service which consists in a small headless client device (e.g. OLinuXino) which will contain sensitive data. The device will be plugged to a remote network (maybe ...
3
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2answers
95 views

Link Layer authenticated encryption vs authentication

Many security articles discuss about adding an extra layer of security at the link layer by either authenticating the data at the link layer authenticating and encrypting it. If we have ...
2
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7answers
357 views

Is it wrong to root login with SSH?

I've long been under the impression that with unix, you should never login as root. Now I've started using Virtual Private Servers over at DigitalOcean, and some advice is to use SSH keys to login as ...
8
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1answer
2k views

Designing single-sign-on with JSONP/CORS?

I like the way that OAuth/OpenID can authenticate/identify a user from another domain, but only if the other domain allows it (presumably on the user's instructions). I would like to do something ...
41
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3answers
43k views

Token-based authentication - Securing the token

I have developed a backend REST API for a mobile app and I am now looking to implement token-based authentication for it to avoid having to prompt the user to login on every run of the app. What I ...
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0answers
45 views

Does Ally Bank's trusted image system actually make login safer? [duplicate]

Ally Bank uses a 'trusted image' system to supposedly make login more secure. I can't find evidence that this is standard practice, so I'll explain it. When creating an account, you choose an image ...
3
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3answers
170 views

NFC contactless payment security

This is really bugging me. Up until recently debit cards with an electronic chip were the most popular electronic form of payment available in Poland (I'd wager that in other European countries as ...
2
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2answers
115 views

Securing fingerprint templates stored on web authentication server

I have a multi-factor web authentication server, that in addition to regular passwords uses fingerprints for user authentication. Can anyone think of a security flaw in the following scenario: I ...
3
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9answers
525 views

Where is the identification process when I use a key fob to unlock a door

I can understand that typing my user name on the computer is "identification" and providing the password is "authentication" but when I use a smart card or a key fob I see no identification taking ...
4
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4answers
138 views

Which one to ask first in multi-factor authentication?

Let's say I have a system which use something you know, like a password, and something you have, like a code sent to a cell phone, to authenticate. Is there a preferred order to ask for the password ...
0
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0answers
63 views

OAuth2 vs. JSON authentication

1) To what extent is OAuth2 more secure than JSON authentication (both over SSL)? The context is a client (one server) querying another server (via API) within a local network using RESTFul. Prior to ...
1
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0answers
86 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 ...
2
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1answer
129 views

Temporarily save failed logins password hashes for using against brute force attack

My question is about online brute force attacks, that try to authenticate in the website. 1) For the first case if the requests are coming from the same ip, I think this are relatively easy as after ...
1
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2answers
223 views

Which encryption technique should be used for cloud computing data transfer?

I want to setup my application for cloud computing for Software as a Service. There is going to be a lot of data transfer between my server and client, to and fro. The technique I have envisaged is: ...
2
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1answer
112 views

How can I protect my “try it with one click” service?

I have a service with "try it now" experience that currently offers a "one click" effort. This service has a pool of N resources (lets say 50). Each new resource takes about 1 hour to generate. ...
29
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4answers
3k views

What is the point in having arbitrary username requirements?

I've looked around on Security.SE, but couldn't find much related to the following problem: I recently signed up for Chase Quick Pay as my method of being paid by a part-time job. I've heard of ...
1
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2answers
71 views

How secure are SSL client certificate authentications? [duplicate]

As far as I understand it's possible to issue SSL certificates, which could be used by clients for authentication. So in theory only users with valid certificates would be able to access a certain web ...
1
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1answer
60 views

Secure automatic authentication to samba share

I need to pull some data from network storage to a publicly available laptop that is running Linux. The network storage used to be provided via a server that could be connected to via ssh, but it has ...
1
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1answer
100 views

Shared Key vs Pre-Shared Key

Does Shared key and Pre-shared key mean different thing ? Currently reading Text , Security+ Guide to Network Security Fundamentals.
7
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1answer
264 views

Collision attacks on OCB?

I've been looking into the OCB cipher mode and everything I hear sounds good. I was planning on implementing it. Everything except for this lone voice, that is: Collision attacks on OCB: We ...
14
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6answers
1k views

Additional security benefits from Multi-Factor Authentication?

Does multi-factor authentication provide any additional security benefits on top of doing a better job at correctly identifying and authenticating users compared to single factor authentication? In ...
1
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2answers
618 views

Could “receive SMS online” site be a scam?

There is a site that allows you to see all SMS received by a certain set of phone numbers (owned by the site). This seems to be meant for services that require two-factor authentication using SMS, ...