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May
31
comment Oracle Internet Directory (OID) hardening
OID requires anonymous search to be enabled if you want to register a database in it. Technotes ID 305371.1, 455031.1, 262560.1 and 456766.1 have more information. I gave up after weeks of hard work, looking at ldap traces and fidling with ACI ...
Feb
25
awarded  Popular Question
Feb
4
awarded  Custodian
Feb
4
reviewed Excellent Future proof encryption possible in theory?
Feb
4
reviewed Excellent Is it preferable to perform encryption using database functions or code?
Feb
4
reviewed Excellent Is it useful to determine the name of the server software while doing a penetration test?
Feb
4
comment Picking an encryption algorithm for auth tokens passed via AJAX
Should you decide to do cryptography in the browser, you might want to look at the Stanford Javascript Crypto Library.
Feb
4
comment Picking an encryption algorithm for auth tokens passed via AJAX
Beware : manipulating cookies with javascript will prevent you from using http only cookies, which increases the risk associated with cross-site scripting (XSS). Complexity is the ennemy of security.
Feb
1
revised Erasing Truecrypt keyfile(s) after volume has been mounted
Self-nitpicking
Feb
1
awarded  Informed
Feb
1
answered Erasing Truecrypt keyfile(s) after volume has been mounted
Jan
26
awarded  Yearling
Nov
29
comment Is there guidance that says all sessions to be logged off when a user changes their password?
Very true, @mehaase. I have updated my answer below to mention its limits.
Nov
28
comment Is there guidance that says all sessions to be logged off when a user changes their password?
This prevents an attacker from getting a valid session cookie, maybe by starting a registration process, and forcing you to authenticate using that session cookie. The attacker does not have the password, but is valid session cookie is now authenticated. Asking the old password when you change your original password prevents further damages.
Nov
28
comment Is there guidance that says all sessions to be logged off when a user changes their password?
I don't know about a formal guidance, but a server could add a something like a version, like a counter or a timestamp, to the authentication cookie. So when a request comes in, the server would : 1. Decrypt the cookie or verify that it was not tampered with 1. Read the password version or timestamp that was valid when the cookie was generated 1. If the password version or timestamp is older, prompt for authentication again. This might be harder to do in other environments. For example, a Kerberos ticket held by an attacker will stay valid after you reset your password. On the web, GMail has t
Nov
28
comment Is there guidance that says all sessions to be logged off when a user changes their password?
Your password is used when you authenticate only. Cookies take it from threre. Changing your password does not change your cookies. You can clear your cookies, but the attacker who logged in with your old password won't :)
Nov
23
comment Public key Infrastructure
@Zzz you have the answer, post it !
Nov
6
answered Attacking an office printer?
Aug
21
awarded  Constituent
Aug
16
awarded  Caucus