Unanswered Questions

22
votes
1answer
999 views

What attacks, if any, are possible against Security Support Provider Interface (SSPI)?

I've been looking at SSPI recently, as it is used for authentication in a variety of Microsoft products. From the looks of it, it's based on GSSAPI and provides an abstraction for wrapping various ...
10
votes
0answers
736 views

MPPE-Send and Receive key derivation from MS-CHAPv2

I am trying to get the MS-MPPE-Send-key and MS-MPPE-Recv-key from the MS-CHAPv2 challenge material. I am able to follow the RFCs 2548 3078 and 3079 to the step of getting the GetNewKeyFromSHA() it is ...
9
votes
0answers
593 views

Attackers of Google DNS hijacking

As we know Google DNS server (8.8.8.8) in 14th and 15th March was hijacked in Sao Paulo. And subsequent to this event, BGPmon.org announced an alert Now, In a course assignment, we are asked to ...
8
votes
1answer
87 views

Monitoring Active Directory Domain Administrator Activities

I need to monitor Active Directory domain administrator activities and look for the following: 1) Looking for anomalies in daily activity 2) Getting alerted upon a violation My problem is that ...
8
votes
1answer
109 views

How to get started with DNSSEC?

I have been assigned the task of improving security of a specific service. After some analysis of the requirements we have come to the conclusion, that a certain aspect of the specified requirements ...
8
votes
1answer
244 views

Security Risks of BD+

I have recently been reading about the DRM measures on commercial bluray disks, in particular BD+. It seems that this technology involves Java software running in a virtual machine, with full access ...
7
votes
0answers
194 views

Linux, TRESOR and XTS

I want to switch from using LUKS for full disk encryption to TRESOR. TRESOR tries to prevent cold boot attacks by storing the encryption key in the CPU's registers. It uses the kernel's crypto API for ...
7
votes
1answer
205 views

Maximum number of nodes with IPSec?

From my understanding, for incoming packets over IPSec, the Security Association (SA) is identified by the SPI field of the ESP header. Then let's say I have a bunch of nodes where each node wants to ...
7
votes
1answer
229 views

Bootstrapping an EC2 Spot Instance

I'm considering using EC2 Spot Instances in an automated fashion (ie create a script that will request EC2 Spot Instances that will run unattended). For this specific use case, I'm happy to lock down ...
7
votes
0answers
225 views

Use token for Windows Server 2008 AD RMS

I have a Windows Server 2008 configured for AD RMS (Active Directory Rights Management Service), another Windows Server 2008 machine that is the domain controller, and a third machine that is a member ...
6
votes
0answers
118 views

E-voting: receipt-free, verifiable, and anonymous

Background In response to a system design concept, a question was posed: How do you achieve electronic voting, anonymity, and verifiability at the same time? I was informed that most experts in ...
6
votes
0answers
828 views

FIDO, U2F Compatibility

I've been following the FIDO standard (a consumer-friendly public-key system similar to SSH key pairs) and it appears that it's close to being complete: both Google and PayPal have been testing it ...
5
votes
1answer
63 views

How does combining SHA256 with RIPE-MD160 compare to SHA256 + SHA-3?

Bitcoin stores its addresses as a combined SHA256 + RIPE-MD160 hash. Is it correct to assume this is done to prevent a failure in the algorithm? Since SHA3 was designed to be an alternative to ...
5
votes
1answer
85 views

How does consent.exe know what to display?

consent.exe is responsible for showning the UAC dialog. Looking at the command line parameters with Process Explorer, I see the following: consent.exe 1316 748 000000004385BD60 I have read How ...
5
votes
2answers
145 views

How are symmetric cryptographic keys stored?

If you have a symmetric key which is negotiated via SRP protocol between a mobile device (e.g. smartphone) and a server, what would be a safe way to persist this resulting key on each side? On the ...

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