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location The Netherlands
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visits member for 3 years
seen 9 hours ago

Student; manufactured 2 decades ago; interested in computer security and software engineering.


Mar
21
comment How does SSL/TLS work?
@RosdiKasim Yes, you can do that easily. Data is unencrypted and can be manipulated until right before it is transmitted. That's the risk behind installing plugins. Rogue plugins are basically the same as running a virus with user (non-adminstrator) permissions: it may be confined to your user account, but it can still log all your keys (keylogger). In the case of a browser plugin it is confined to your browser, but it can still get all website's data (including passwords when you type them in).
Mar
19
comment Finding Hidden Keylogger Through Forcing a Computation Error
"Maybe this is something a bit higher than what most people on this site are able to answer" Honestly I think it's more beyond your comprehension, not the people on this site. It was a good laugh though to read you filming a screen at 16k fps when it only refreshes 60-120 times a second. Edit: Also to answer your question: 1. you can tap a line without slowing it down, and 2. you can do software keyloggers without introducing delay since you read the key after-the-fact instead of intercepting it (sudo cat /dev/input/*).
Mar
18
comment How safe is SSL?
TL;DR: yes it is all encrypted and secure. Even if it wasn't, there is nothing you can do about it. Adding hashing via javascript adds no security to https.
Mar
18
revised How safe is SSL?
Removed unnecessary markup, fixed typos
Mar
17
comment Why warning sign when visiting https-website?
It's a lengthy piece, but the answer is in here: security.stackexchange.com/a/20833/10863. Under the section "How to crack SSL," subsection "in detail," paragraph 2, it is explained what causes this warning sign.
Mar
13
reviewed Approve Would using Google reCAPTCHA allow Google to cheat?
Mar
12
comment Why am I allowed to access protected Windows files when I boot Ubuntu from USB?
@Emmet Yeah, very clever.
Mar
11
comment Is this where a nonce comes into play?
@user3379785 Note that comments aren't really meant for chatty back-and-forth stuff. The chat is usually recommended instead, but for some reason you need 20 reputation point to participate in the chat... If you have more questions on this topic you could email me or something. See https://lucb1e.com/!about for contact details. If you have a more general question (something that would be of use to others), you can always start a new question on this site.
Mar
11
comment Is this where a nonce comes into play?
@user3379785 The crux of the problem is that the GUID is both the unique way of referring to an account and it provides full access. So as long as the GUID can be used instead of username+password, I think the design could be improved (even if it's not directly broken, like I said in the post). You say the GUID is checked before API calls, but how is it checked? You mean the server checks whether the GUID matches the session's owner? So the GUID is not enough, you now also need to send the session id with API requests to control an account? In that case I think it's much more solid now :)
Mar
11
awarded  Nice Answer
Mar
10
comment Is this where a nonce comes into play?
@user3379785 It could be, but it's probably much more practical to generate it only once and put it in a database column. Or generate it upon logging in and put it in a session file (or session table). Depends on the implementation.
Mar
10
revised Is this where a nonce comes into play?
added 83 characters in body
Mar
10
answered Is this where a nonce comes into play?
Mar
10
revised Why am I allowed to access protected Windows files when I boot Ubuntu from USB?
Fixed a broken sentence and added a little bit of info
Mar
9
answered Why am I allowed to access protected Windows files when I boot Ubuntu from USB?
Mar
9
reviewed Reject Is Adblock (Plus) a security risk?
Mar
7
reviewed Approve Does it make any sense to alter a hashed password?
Mar
5
reviewed Approve Is it worth it to get paid anti-virus software?
Mar
5
reviewed Approve What risks do Cookieless sessions have? What are the mitigations?
Mar
3
reviewed Approve What is the most hardened set of options for GCC compiling C/C++?