Questions tagged [identity]

Identity is the property of an object which allows it to be uniquely specified.

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89
votes
5answers
28k views

Are GUIDs safe for one-time tokens?

I see a lot of sites use GUIDs for password resets, unsubscribe requests and other forms of unique identification. Presumably they are appealing because they are easy to generate, unique, non-...
50
votes
21answers
20k views

Are there unphotographable, but scannable ID cards?

We have a client who hosts an event, with a tight budget, that uses lanyarded Photo-ID cards with barcodes on them. The barcodes are used to gain access to various areas at the event. We were ...
47
votes
11answers
30k views

Why use usernames and not just email addresses to identify users?

Why use usernames, and not just email addresses, to identify users? - What is the main concern or the main case when a security expert (which I'm not) should recommend inserting another layer of ...
46
votes
4answers
9k views

Paypal sent an email addressing me with one of my old passwords as my name

I got this email from service@intl.paypal.com, with the title: Your account has been limited until we hear from you. I think this is a scam / spoof email because I don't see any notification in my ...
41
votes
5answers
8k views

Should usernames be kept secret?

Help me settle an discussion among colleagues and guide future design: Even in a high impact scenario: e.g. protecting payment application or government gateway but in an Internet accessible ...
36
votes
2answers
21k views

Role Based Authorization vs. Claim Based Authorization

What is the difference between "role based authorization" and "claim based authorization"? Under which circumstances would it be appropriate to implement each of these authorization models?
34
votes
7answers
7k views

Could governments and banks become CAs?

When you apply for a passport, driver's license, home mortgage, bank account, credit card, etc., the issuing organization must verify your identity. In the course of doing so, would it be feasible for ...
33
votes
3answers
40k views

Why do I need to hide my phone's IMEI

If it is a secret then why is it visible on the box, invoice and the back of the phone? If it is not a secret then why does it have to be blurred when it gets posted online?
24
votes
3answers
2k views

A Different Approach to PKI

After yet another failure of the public key infrastructure, I was thinking about how broken the whole thing is. This business of undeniably associating an identity with a public key, and all the work ...
22
votes
1answer
13k views

Ways to sign gpg public key so it is trusted?

I have a service through SSL which gives the user a code for a specific reason. I want to sign the code with the web server's private key (gpg --clearsign) and send the signed code along so that they ...
21
votes
1answer
402 views

What's this kind of authentication scheme called?

In the past I've heard about a scheme to prove your identity online in places like forums, without having to create an account. When posting, the user would enter a password which is then heavily ...
20
votes
2answers
15k views

Best Practice: “One per-user ssh key” or “multiple per-host ssh keys” [duplicate]

Possible Duplicate: What’s the common pragmatic strategy for managing key pairs? I was part to a conversation last week about which approach to ssh keys is more “secure”. Note, that when ...
19
votes
6answers
13k views

How to verify that someone is who they say they are online?

I am working on an online job application web app and the question has come up about how we will verify that someone submitting an application is who they say they are. For example, we don't want ...
19
votes
2answers
180k views

Spam that comes from names in my address book, but not their email addresses

I've recently received two spam messages that show a possibly worrying degree of knowledge about my contacts, and I'm wondering how concerned I should be. Specifically, the names -- but not the email ...
18
votes
3answers
102k views

Can law enforcement track a criminal through dynamic IP address?

I ask because a week ago my home was broken into and, among other things, my iMac computer was stolen. I am desperate to get it back because it has all the pictures of my daughters from the last ...
16
votes
4answers
406 views

Are malicious relying parties able to abuse OpenID logins?

if I logon with OpenID into a website (crafted by attackers/hackers) I want to know how much damage can they do to me? Are they able to steal my contact info, name, etc (assuming I'm using Gmail ...
15
votes
3answers
1k views

How to secure identity after someone dies?

How would you go about securing the online identity(ies) of someone as best you can after they've died, when they haven't put anything in place ahead of time for this event? Assume we don't know how ...
14
votes
3answers
7k views

Length of CSRF Token

Is there any standard length of the token which should be used while generating the random tokens? Should we use the same standard which we use for generating Session IDs?
14
votes
3answers
5k views

Best practices for GPG user ids

What is the best practice for choosing GPG user id(s)? I've read various bits of advice, which sometimes even contradict each other. For instance, I've read that one should not use comments, because ...
13
votes
3answers
79k views

Someone keeps using my email address. What to do?

I have had a GMail ever since it was created, so it's an email address that is easy to remember, but also easy for somebody else to get confused with. Since I'm not going to post my email address ...
13
votes
2answers
89k views

Why do some companies ask last 4 digits of my SSN or a scan of my ID? What are my risks?

Yesterday I found out that some major service provider (online rentals) that I use now requires proof of my identity if I want to continue and make a booking. I was offered 2 options: Enter last 4 ...
13
votes
3answers
16k views

Why would someone register a Facebook account with a stolen email address?

I witnessed an interesting attack today. Someone was able to register a new Facebook account with the email address of a friend of mine. We don't know how it happened, because Facebook requires you to ...
12
votes
11answers
13k views

Besides IP addresses, how else could one be identified? [closed]

OP: I'm curious how else an actor seeking to identify someone online could accomplish this task besides just using an IP address. What methods would they employ? What knowledge must they have of the ...
12
votes
2answers
5k 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 ...
12
votes
1answer
2k views

What encryption prevents the tampering of Windows Identity Foundation (WIF) FedAuth cookies?

It occurred to me that the WIF FedAuth cookies contain identity information, that if tampered with, could permit someone to assume the identity of another user. Fortunately, WIF does ...
11
votes
2answers
411 views

How to protect against exploitation using a lapsed domain

Consider a domain that had been in active use for some time but is no longer desired — perhaps the company is out of business or a name change took place years ago, or whatever. The domain ...
11
votes
3answers
8k views

How secure can IP based login be?

From several security books and sites I understand that IP-based security (with which I mean: user is verified only by IP address) is a bad idea. One of the reasons is obvious, multiple actual users ...
11
votes
1answer
2k views

How to prepare for protecting identity after death?

In the context of online accounts and identities, what are some best practices to prepare for the one certainty we all face: not a one of us will get out alive.
10
votes
7answers
529 views

Aren't permanantly logged in accounts inherently insecure?

The basic premise behind a "keep me logged in until I log out" feature is a cookie is stored with some identifier that is used to log the user in again when returning to the site. While these ...
10
votes
1answer
336 views

Is it possible to “reverse engineer” identicons?

As shown in this question, default user avatars (like mine) are identicons and are generated with the user's email (where provided) or the user's IP address (where the email is not provided). Given ...
9
votes
2answers
3k views

Is there a reason why IMEI is stored in EEPROM?

I've heard that IMEI numbers are stored on an EEPROM, essentially letting them be erased and rewritten. Thieves misuse it to make stolen phones untraceable. Is there a reason why manufacturers don't ...
9
votes
2answers
504 views

Electronic identity and digital signatures - why they are different?

It seems (to me at least) that is is generally accepted that "electronic identity" and "digital signatures" are a different thing. For example, in the Estonian ID card there are two certificates - one ...
8
votes
6answers
2k views

Secure Internet Polling

In the United States, there has been a lot of talk about creating a secure polling system that would operate over the internet. I have also heard that Securing a poll over the Internet is impossible. ...
8
votes
5answers
465 views

How to verify new accounts against a known persons database?

I need to (try to) solve the problem of new account creation for a patient portal for a medical records system (electronic health record). That is, a way to activate a patient online and match her ...
8
votes
5answers
2k views

How to protect myself online from the government? [closed]

I need something trusted and secure. I need to make “onion layers security” with the most secure and hard to hack/crack software. How to protect yourself from the government on the internet? I’m ...
8
votes
4answers
2k views

Is 'Bring your own Identity' as the only authentication option a valid practice?

This question is mainly aimed at OpenID Connect, when it is fully realized. I understand the aversion to signing in with a social networking site, but from what I understand about OIDC, its supposed ...
8
votes
6answers
2k views

Should I use a cryptograpically secure random number generator when I generate IDs?

It is common to generate random identifiers to expose through an API instead of using a simple auto incrementing primary key. The reasons are many: Prevents easy enumeration. Does not give away order ...
8
votes
1answer
6k views

Passport copy is being used to defraud others - what can I do?

I was an idiot and sent my passport and address to a scam artist I was hoping to rent an apartment from abroad. Luckily, I realized the trickery before sending anything else or any money. ...
8
votes
1answer
380 views

How can I limit the consequences of a possible future identity theft?

I am curious about how I can limit the consequences of an identity theft. I see a lot of discussion and advice about managing passwords securely or blocking malware. But what if it happens? What if ...
7
votes
2answers
8k views

What is the exact difference between SAMLp and WS-Trust?

They seem to be similar on the surface, but I'm not sure how deep the differences are. Can someone explain to me the difference between SAMLp and WS-Trust? ADFSv2 gives me a choice between these ...
7
votes
2answers
6k views

Best practices for verifying a users identity for helpdesk

I had a conversation today and someone challenged me as to why you would need to verify the identity of a user calling a service desk with anything other than their company email. Granted, I know ...
7
votes
1answer
97 views

User IDs containing URIs

When adding a User ID to your OpenPGP key, you are typically asked (for example by GnuPG) to provide a name, a comment, and an email address (where each part is optional). This format (Name (Comment) ...
6
votes
4answers
18k views

Bank account number and account holder in check exposed?

I'm not sure if this is standard practice in all banking institutions but almost all banks where I've received checks the account number of the issuer is exposed (some even the account name). Isn't ...
6
votes
5answers
7k views

Can we have https without certificates?

I apologize in advance if I am fundamentally misunderstanding something, but is it possible to have encrypted communication protocols (https, I suppose) without resorting to a certificate system? ...
6
votes
2answers
466 views

Single vs multiple personas? What are the security implications?

I have two email addresses, one for work and one for home. I have have two cellphone numbers, one for work and one for home. But I am just one individual (and only have one social security number ...
6
votes
1answer
3k views

Why should I trust a JSON Web Token (JWT)?

In the SAML and Kerberos authentication models, there is an explicit understanding of what authority has authenticated the user and issued the credential to be trusted by downstream systems. For ...
6
votes
1answer
198 views

Can windows domains be faked?

Without the equipment and software (and knowledge yet) readily available to test myself, I've been wondering about the relationship between computers and domains in a Windows environment. Some ...
6
votes
1answer
2k views

Deal with number changes in a phone number based authentication/login system

Twitter Digits (https://get.fabric.io/digits) provides an authentication/login system based on phone numbers for mobile apps, and several other mobile apps (e.g. Square Cash, https://squareup.com/help/...
5
votes
1answer
383 views

Why would a stranger keep signing up to trading sites with my email address?

I have read the answer below and understand that there is not much I can do about the basic problem of somebody signing up for newsletters and online services using my email address: Someone used my ...
5
votes
4answers
3k views

How to verify personal information (identity)?

I've been trying to find this information but all I can find are answers saying to use a credit card for verification, not real answers. I am trying to figure out how/where companies get information ...

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