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Pentester, ex-developer, security researcher, reverse engineer, electronics tinkerer, internet activist, zombie eradicator, promulgator of useless facts, shrubbery inspector, bacon aficionado, devourer of donuts.

Strengths: Security, Crypto, Win32 API, C#, .NET, PHP, x86 assembly

All answers and comments are encrypted with ROT256-ECB.

Opinions are my own. Advice provided with no warranty.


May
18
comment Firebug reports SHA-1 certificate error
Ah - I worked it out. The certificate has a list of Subject Alternative Name records, including *.googleapis.com. For some reason Google chose to set the storage domain as the CN.
May
18
comment Firebug reports SHA-1 certificate error
All that said, I haven't quite worked out why a certificate with a common name of *.storage.googleapis.com is considered correct for the domain ajax.googleapis.com...
May
18
answered Firebug reports SHA-1 certificate error
May
18
comment Disadvantages of disabling RC4 in SSL/TLS
Side note: when I say XP can "only" use RC4, that's a simplification, as it also supports DES, which is arguably better in some respects if you use it as part of 3DES. However, I don't recommend 3DES in TLS 1.0 (the only protocol it would make sense to add it to for compatibility) due to BEAST and the meet-in-the-middle attack against 3DES.
May
18
comment Disadvantages of disabling RC4 in SSL/TLS
I'm not sure that your advice holds in all situations - many very important web applications and web services are only used by legacy systems which do not support AES, but only DES and RC4. In such cases, disabling RC4 would prevent access from these devices. It's not all about how important the data is - there are also environmental factors.
May
18
answered Disadvantages of disabling RC4 in SSL/TLS
May
18
answered ASP.NET Machinekey encryption
May
18
comment What is encryption by RSA with AES?
@AlpA If you'd split it individually you'd have found that most of the questions you wanted to ask were already answered elsewhere, so you only needed to ask one or two specific ones to cover the more specific parts of your question.
May
18
revised What is encryption by RSA with AES?
added 7 characters in body
May
18
comment What is encryption by RSA with AES?
Sorry, yes. 2^56 64-bit blocks. I'll fix it.
May
18
comment What is encryption by RSA with AES?
Also, for future reference, we usually request that you ask one question per post. You've stuck a lot of stuff into one place here, which is probably why someone downvoted. Take a look at our tour page and the help center for more information on how StackExchange works.
May
18
comment What is encryption by RSA with AES?
I think you have a typo - it's CBC, not CBS.
May
18
answered What is encryption by RSA with AES?
May
18
answered What is safebrowsing.google.com ?Does it impact the security testing?
May
18
comment How do I prevent SSD file recovery?
@Sina As long as TRIM runs on the sector, you're fine. A potential failure case is if you get a power outage immediately after deleting something, before TRIM gets round to clear the affected sectors. Some drive firmwares have also been known to implement a faulty TRIM algorithm, but these are mostly documented and fixed. Check for firmware updates from your manufacturer.
May
17
answered How do I prevent SSD file recovery?
May
17
comment Windows Passwords
The first step would not to be to bruteforce the SAM hashes - it'd be to pull the LSA stored secrets to find the plaintext cached passwords.
May
16
comment Is there a full disk encyption software that shows different content depending on what password has beeen used?
@Damon Also, you can just turn off the TPM and use BitLocker in passphrase mode, which means you (a) don't have to rely on the TPM, and (b) can use a passphrase of any number of 7-bit ASCII characters (I don't think there's a limit). My passphrase easily breaches 200 bits according to KeePass' estimation, and we have some automatic-entry ones at work that I guarantee are in excess of 500 bits.
May
16
comment Is there a full disk encyption software that shows different content depending on what password has beeen used?
@Damon The basic PIN in TPM mode is a numeric identifier, and you're right that its entropy is relatively low - 68 bits or so at best. In enhanced PIN mode with a TPM, you can use 20 7-bit ASCII characters, which is more like 132 bits of entropy. Keep in mind that the TPM actively rate-limits you so brute force against it should not be possible.
May
15
answered How to test for CSRF if there are many hidden fields with different values?