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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2
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2answers
84 views

Should it be possible in a good software, using a “Change Password” link for a single user, to try to guess passwords for every user of a Application?

I am having a fight with the "Security Expert" of my team about this very basic question and I need help in getting a good valid argument(s). The pretext is as follows: Should it be possible/valid to ...
0
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0answers
111 views

Account Signup/Login: Code-via-SMS + email verification

In an effort to make the sign-up / login to a mobile app more streamlined, I am considering alternatives to the username/password signup/login. In this case (as is with most mobile apps) login event ...
0
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0answers
35 views

TPM based authentication without a trusted third party

Consider a scenario - Device manufacture provides in advance the TPM’s endorsement key certificate(containing EK public key) for device to be deployed. In general, what are the TPM operations that ...
5
votes
1answer
65 views

Keeping login in sync with third party providers

When you use a third party for authentication (E.g. Google/Facebook javascript SDK), their SDK keeps track of the login status. If I have my own server, which requires an access token of it's own ...
-1
votes
1answer
90 views

Does the page that links to my login page need to https?

So I realise the login ajax call must be https, and the page that ajax call is made from should also be https to prevent a man in the middle potentially changing the page and changing the form that ...
1
vote
3answers
286 views

How to (further) ensure SSH security?

I set up my Linux Ubuntu machine as an SSH server through no-ip.com and it works great. Recently I discovered the command, sudo lastb -ad -F -w which outputs a log of the most recent failed SSH ...
0
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2answers
167 views

Computer Security vs Privacy

Probably this is a redundent post but in fact I have been searching online about a precise clear distinction between computer security and privacy. I'd like to know the difference of between them ...
3
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1answer
25 views

Automatic client executable updating

Scenario I am currently developing an application which should automatically update (if applicable) every time it is executed. The update would involve replacing the main.exe and any assets in an ...
3
votes
4answers
123 views

How secure can you be on an untrusted machine?

I feel like most of what is written about web security assumes you are using a trusted / secure PC. I'd like to consider the opposite: you are using a PC (say, at an internet cafe) which is known to ...
-1
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2answers
130 views

Decrypting a very simple key [closed]

I'm doing a basic cryptography course and a question is asking to to decipher: ...
2
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2answers
131 views

staying not signed in: is it the safest procedure?

each time I do connect to a private or public network I log into websites by keeping the option "stay signed in" or "keep me signed in" unselected, so I have to re-type my username and passwod as ...
-1
votes
2answers
86 views

what is the different between X.509 certificate and 2-way SSL? or both are same? [duplicate]

Can anyone clarify what is the difference between an X509 certificate and two-way SSL? or both are same?
13
votes
6answers
3k views

Is it a security issue to allow nearly identical email addresses when registering?

Say you have a website where it is possible to create accounts for all of the following email addresses: 'test@test.com' 'test@test.com ' 'test@test.com;' 'test@test.com;test2@test.com' Should this ...
1
vote
5answers
116 views

Best Security Method for SSH Access

I have been starting to think about security in a bit more depth recently and have hit a few questions which I would really value opinions on. For years I have had the same SSH Keypair to get to my ...
25
votes
10answers
7k views

Two passwords for one account

Would it be a good idea if you had one account which would require two different passwords ? For example your login details were: email: example@gmail.com password 1: P4$$w0rd1 password 2: ...
3
votes
1answer
168 views

Is it secure to use the same token as both refresh token and access token?

As far as I understand in OAuth there is a refresh token and there is an access token. The access token cannot be revoked but short-lived and on next refresh access there will be no access token if ...
3
votes
1answer
104 views

Is a security question you just have to 'remember' a good idea?

I was setting my eBay security questions and one of the choices were: Now I've seen sites that allow you to "type your own question" and "type your own answer" but unless they forgot a text field, ...
1
vote
1answer
228 views

How to brute force HTTP Basic Authentication requested with XHR?

How can one brute force a website using HTTP Basic authentication using metasploit which uses XHR in background? I am getting error "No URI found that asks for HTTP authentication". Relevant headers ...
-3
votes
2answers
90 views

Defense in depth

How is defense in depth strategy different from network security policy? What is the need to name it a "Defense In Depth", although you may simply name it "Network security policy"? Secondly if DID ...
4
votes
1answer
50 views

How do I verify that in-app social login dialogs are secure?

If I have a mobile app that supports some kind of social login feature, say, to login to the app from my Facebook account, and if the app opens the Facebook login page inside the app in a mobile, is ...
0
votes
3answers
105 views

Access Key In URL - Securing The Unsecured!

I'm having some difficulties doing this the right way (as much as it can go). Some time ago, I've asked a question here, asking for help on how to implement sending an access link through email. ...
1
vote
1answer
138 views

Saving encrypted username password in session

I have Node.js server which serves an app. In that app you could be asked to login. The login credentials would be authenticated against LDAP. That server could request/post data from other servers ...
0
votes
1answer
103 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 ...
5
votes
1answer
94 views

Can I use a satellite phone for 2 factor auth sms and such?

Would 2 factor authentication SMS messages or other kinds of internet security notifications work with satellite phones? E.g. companies like Google, Paypal, Facebook, banking institutions and others ...
0
votes
0answers
33 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. ...
0
votes
2answers
166 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 ...
1
vote
2answers
92 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
votes
0answers
35 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 ...
0
votes
1answer
93 views

Mutual Authentication and Authorisation with Certificates from various CAs

Edit: Having read this question and answer I have a bit more of an understanding. My question now then, is: can I use a certificate that a user has had signed by a registered CA such as VeriSign, ...
3
votes
2answers
177 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 ...
0
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0answers
16 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
votes
1answer
158 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 ...
4
votes
1answer
64 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 ...
110
votes
19answers
27k views

How should I securely type a password in front of a lot of people?

I am a manager in an office where the company does not provide a company email, so I use my personal email. Often, I will receive jobs lists by email from my general manager. How should I log in to ...
6
votes
2answers
102 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
votes
2answers
92 views

What does it mean to have authentication without confidentiality or authentication without encryption?

I came across these functions m+EeA(H(m)) (for authentication without confidentiality) and m+H(m+k) (for authentication without encryption) and I'm having a bit of a difficult time understanding them. ...
1
vote
0answers
39 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
vote
1answer
64 views

Allowing VIP Access Credentials from Mobile Devices (smart-phones/BB) but not Desktops

What could be an explanation for such a decision by a company? Simple oversight, or deliberate choice? It seems like a mobile device is easier to lose/crack. ETA: The company is using it as a 2FA for ...
2
votes
3answers
206 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
vote
1answer
131 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 ...
1
vote
1answer
92 views

Why is CertificateVerify message necessary? (Why isn't client authentication done through the KeyExchange)

Why is client authentication not done throught the KeyExchange like with the server, but through a CertificateVerify message? EDIT: To be more clear: When using RSA key exchange the client encrypts ...
0
votes
1answer
43 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 ...
3
votes
3answers
137 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 ...
1
vote
1answer
64 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 ...
0
votes
0answers
25 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?
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 ...
7
votes
2answers
125 views

How can I implement a secure download area on a website which requires an electronic signature?

For quality management purposes, the company I work for would like a system which requires a client to read through a disclaimer and then provide an electronic signature, acknowledging said ...
1
vote
0answers
94 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 ...
2
votes
2answers
356 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 ...
1
vote
0answers
103 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 ...