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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3answers
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How does DCOM authentication compare to RPC based authentication/auth?

The following paragraph from MSFT Best Practices for 2003 PKI says Windows 2000 authenticated via RPC vs 2003 that authenticates using DCOM A CA running Windows Server 2003, Enterprise Edition, ...
27
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7answers
12k 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 ...
0
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1answer
84 views

Mail server security: Mails to internal receivers with faked sender address

I noticed that I am able to send emails from my company's mail server to internal receivers from faked inhouse sender addresses without problem and I'm wondering if this should be supposed a security ...
0
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0answers
27 views

Windows Integrated Authentication with OAuth2 - do I need SSP/APs for LSA?

I Need to develop an integrated authentication mechanism that trusts our OAuth2 STS. Yet implemented is a credential provider that collects the user credentials and asks our STS for authentification. ...
2
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2answers
445 views

What are my options for securely printing an OTP Scratchcard?

I want to print and distribute several One Time Passwords (OTPs) that can't be easily disclosed to a 3rd party in transit. (think the physical version of a TLS session for private secrets) To me ...
0
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2answers
154 views

Default user names to avoid

Following this answer on a question about fake users, is there a general list of users which would be deemed to be a common username? The part of the linked answer I'm referring to is Don't use a ...
56
votes
7answers
10k views

Are passwordless SSH logins more secure?

I had a long discussion with my co-workers whether key-based SSH authentication (particularly for OpenSSH) is more secure than authentication using passwords. My co-workers always connect to servers ...
0
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3answers
113 views

How secure is this token url for subcontractors with no accounts?

Imagine you are a cab company that subcontracts independent drivers to drive within certain cities and towns. You send the subcontractor a link to a page that has fields for the subcontractor to ...
4
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1answer
62 views

Is it dangerous to publicly share a scopeless token?

If a service allows you to create OAuth tokens without any scopes (allowing 5k API requests / hour for public resources), is it dangerous to share these tokens publicly? The obvious problem I see is ...
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2answers
90 views

Does two factor authentication increase the attack surface?

Would adding two factor authentication to an application increase the attack surface of this application? I think it would, since by adding complexity the likelihood of a vulnerability in my ...
0
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0answers
30 views

Meeting HIPAA standards in a server-to-domain-client application?

Similar, inconclusive question by someone else found here: HIPAA requirements for local server The requirements are that the application runs on a Windows server and can be expected to connect to up ...
60
votes
8answers
14k views

Should I change the default SSH port on linux servers?

Is there any advantage in changing the SSH port, I've seen people do that, but I can't seem to find the reason why. If you have a strong password and/or a certificate, is it useful for anything? ...
3
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2answers
151 views

How do online polls ensure only one vote per person?

For instance, TIME's Person of the Year poll. I can see that CAPTCHAs would prevent the worst abuses, but if the server just gets a bunch of POST requests, how does it decide that this one came from ...
5
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3answers
321 views

How bad is exposing valid user names?

Today like many other times in the past, signed for a new service and got a common error message: Your user name or password is invalid This time I am wondering how useful it is to notify ...
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0answers
14 views

Using Digital Signatures in isolated networks

Is it possible to use Digital signatures in isolated environments which do not have access to internet and work only on internal network. How does the certificate authentication happen in such case
0
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1answer
126 views

HTTP Basic Authentication - password missing

I am trying to retrieve a username and password send over the network. I was able to capture the following using Wireshark: GET /rcp_tunnel HTTP/1.0 Host: ***.***.***.*** Authorization: Basic ...
29
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3answers
187k 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?
15
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2answers
5k views

Secure communication between applications using SSL Certificates

I am looking for a way how to secure communication between our applications. There is a "server" application listening on some TCP port and "client" application which is communicating with the ...
6
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2answers
89 views

HMAC with or without data encryption?

I'm in the process of developing a system that periodically transmits a small amount of data (16/18 bytes), where the only part that will change is a 4 byte counter that will increment for each ...
2
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2answers
2k views

How to view all SSH authorized_keys for a unix server

How would I view all the authorised SSH clients from a unix server? I know that cat ~/.ssh/authorized_keys shows authorised keys if logged in from root. Can other users set their own authorised keys ...
2
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3answers
199 views

Is it ok to send plain-text password over HTTPS? [duplicate]

I understand why the password should be salted and hashed before being saved into the database, but my question is if it needs to be hashed on the browser side or just sending plain-text password over ...
1
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0answers
36 views

Renewing certificates in web services using mutual (2-way) authentication

I have a web service (let's call it Service X) which multiple other web services (clients) depend on. Communication between the Service X and any of the clients is done via mutual authentication ...
1
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1answer
126 views

Could EA know my password across multiple sites?

A few days ago I received an email from EA stating they reset my password because it may be compromised: The password for your Origin account was recently reset because a standard systems analysis ...
2
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1answer
109 views

Using Google Authenticator for SSH sessions

So I have an SSH tunnel which I use with dynamic port forwarding to the alternate http port on the client. For initializing this connection, I'd like to implement an additional verification step, ...
2
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2answers
198 views

How does t-mobile's secureauthentication Twitter app work?

If you try to get support from T-Mobile using Twitter, they'll try to get you to allow an app that only has permission to view your tweets and your followers. How does this help T-Mobile authenticate ...
3
votes
3answers
134 views

Good way of storing lots of third-party passwords

I've consulted this question, but I'd like to hear some more input. I'm building a scraping app that is going to act as an aggregator of sorts for a large number of businesses which use a few popular ...
0
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1answer
42 views

2 step authentication hybrid

I'm all forward on 2 step authentication. I understand how it is way more secure than a simple password. However I'm always afraid to start using it because I believe that in some cases I could be ...
4
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2answers
238 views

Storing server generated passwords

There are some applications that generate passwords for you. Consider a case where you sign in via Facebook, the application (let's call it NEWAPP) verifies your sign in on the server using FB tokens ...
1
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1answer
61 views

Risks of letting user know if the username is invalid? [duplicate]

I notice most websites simply say "user name or password is not correct", however some will tell you if the user name does not exist. Are there any security risks letting the user know if they ...
1
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2answers
273 views

Is it safe to use Google Authenticator app and SMS instead of passwords

I currently want to start web development where I will be making a login system and want an alternative to storing passwords. The question is: is it safe to use the Google Authenticator app as the ...
13
votes
6answers
14k views

Difference between authentication and identification [Crypto and Security perspective]

I am always confused by the way the word authentication is used in security literature (i.e., outside the crypto realm). Most of the time I understand that they are actually implying identification. ...
34
votes
3answers
3k views

Overarching term for 'authentication' and 'authorization'?

The internet is rife with 'authentication vs. authorization'-type questions. I'm not asking that here. I'm wondering if there is some overarching term that encompasses both of these. I've seen ...
0
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0answers
24 views

What is more secure for Authentication: PostMessage or Redirect

Apple iCloud has the option to either PostMessage or Redirect upon authentication. Which is more secure, and why?
0
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0answers
66 views

Passive authentication

I am a relatively new developer to advanced information security related features, hence please pardon me for any mistakes. I came across the concepts of passive authentication and active ...
0
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2answers
131 views

Disclosing too much info over email just to close account?

I have account with a stock option trading platform. They are well known and reputable. I had a couple thousand in the account, bought and sold for a while, and then cashed out and withdrew. So I'm ...
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4answers
5k views

Why did Richard Stallman recommend not to use passwords for wireless networks? [closed]

In a short interview, Richard Stallman recommends not to put passwords on your wireless network. In the OS Revolution documentary he also mentions how he's disliked passwords ever since his job at MIT ...
1
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0answers
95 views

Steam two-factor authentication algorithm? [closed]

I'm all on-board that Value is recently pushing for two-factor authentication on Steam accounts. I'm not happy that they force you to use the Steam mobile app because both on iOS and Android, it's a ...
10
votes
3answers
829 views

Steam and two-factor authentication

The Steam platform is designed to encourage users to use two-factor authentication. One of the community tasks (achievement-like objectives) on Steam is "Use the Steam Mobile App for two-factor ...
11
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2answers
3k views

Benefits and drawbacks of giving an Administrator two accounts for elevated rights and another for daily use, such as email

Microsoft has long promoted the need to separate administrative accounts from regular use accounts, as shown with this guidance MSFT even went to far as create ADMINSDUser rights to put ...
13
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2answers
3k views

Is this a secure data exchange scheme for a game?

I am writing a multiplayer game. I have a central server which processes everything. For data exchange I use HTTPS protocol. Because this is a game I cannot use computationally expensive systems like ...
4
votes
1answer
71 views

What types of trade-offs are appropriate when using encryption/authentication on devices with low bandwidth?

This is my first foray into this Stack Exchange, and I have limited knowledge of the InfoSec world, but I'll try to make this a pointed, answerable question. I'm tasked with investigating including ...
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2answers
50 views

Are third party authentification provider included via iframe by default considered (in)secure?

Authentification provider X is used by many non-related websites like A, B and C as (sole) authentification provider. X therefor provides a framework for athentification which includes a login form ...
2
votes
2answers
131 views

What are reasonable alternatives to “Trust this computer” prompts when signing in?

User feedback for a bank authentication website included this comment: It's annoying to get verification codes to my email or phone every time I log in to my Bank account from a new device ...
2
votes
0answers
28 views

OAuth2 client account & data storage [duplicate]

Context I have a REST API where a user can create an account from a web client. The password is saved as a salted hash in a database. When a user is authenticated they can save and retrieve private ...
5
votes
2answers
1k views

Kerberos vs. LDAP for authentication — which one is more secure

Can anyone describe/outline the relative merits of using Kerberos or LDAP for authentication in a large heterogeneous environment? And Can we switch between them transparently?
2
votes
1answer
57 views

Wired Deauth-Like Attacks

[story] Good Evening Guys, I just got out of a lan house which uses a system named Geto (Geto Lan House Management System 4.0), and I was wondering if it is hackable. [/story] While searching for ...
1
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1answer
228 views

Identify the attestation certificate (X.509) in Fido U2F registration response

I'm trying to identify the attestation certificate (X.509) in Fido U2F registration response as described in fido-u2f-raw-message-formats-v1.0-rd-20141008.pdf document: An attestation certificate ...
79
votes
6answers
20k views

How secure are the FIDO U2F tokens

Google and Yubico just announced the availability of cryptographic security tokens following the FIDO U2F specification. Is this just another 2FA option, or is this significantly better than solutions ...
3
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1answer
58 views

Proper secret key management

Right now, I'm thinking that for all incoming requests, my server will check the token of the request against the token constructed from my app's global secret key for authenticity. The only way for ...
4
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5answers
247 views

Avoid unauthorized updating of online leaderboard php/sql [duplicate]

I am developing an offline web app (game) for android using cordova (phonegap). The leaderboard of the same is maintained online in my server. Currently this is how the leaderboard is updated Step ...