A description and set of rules for the ordered exchange of structured information designed with the goal of protecting the security of the system.

learn more… | top users | synonyms

3
votes
2answers
216 views

Biometric device instead of password - signature security

Lets assume that there is a bio-metric algorithm for user authentication which compares fingerprints with a user's signature saved in a database (comparing function is not important here). Next, there ...
0
votes
2answers
81 views

Challenge authentication without roundtrip

Is it possible to have a secure challenge/response authentication protocol, authenticated immediately? Too slow: a client request -> server challenge -> client response -> server response Fast ...
5
votes
0answers
157 views

Secure backup encryption with OpenSSL

I know, the general advice is "keep your hands off crypto stuff". And the standard way to encrypt backup data securely would be using GnuPG. However, for a rather academic exercise, I would like to ...
4
votes
0answers
33 views

SSL 3.0 for clients without room for chosen plaintext attacks

I've collected the issues that affect SSL 3.0 and found that they are either configuration issues (disabling RC4, RC2, DES, anon, export, null suites, compression, proper key lengths, etc.) or ...
3
votes
0answers
158 views

Main difference between Yahalom and Needham-Schroeder key exchange protocols

I am just wondering what is the main difference between the Yahalom and Needham-Schroeder key exchange protocols? Which protocol uses less computational power?
2
votes
0answers
70 views

What are the formal methods to analyze Authentication Protocol

I designed an authentication protocol for consumer-producer applications, which barrows features from Kerberos and Tesla. To check the strength of protocol I considered different well known attacks ...
2
votes
0answers
190 views

What is a 'host identity' in the 'Host Identity Protocol' (HIP)

I'm a little confused about terminology in the Host Identity Protocol (HIP) The two distinct terms Host Identity and Host Identifier are described in https://tools.ietf.org/html/rfc4423#section-3 ...
2
votes
0answers
32 views

Verification of implementations of security protocols

I'm interested in how an implementation of a security protocol can be verified correct and complete. The AVISPA project (http://www.avispa-project.org/) can be used to verify the protocol. I guess ...
2
votes
0answers
111 views

In U-Prove, what is the purpose of “Pseudonyms”, “Committed”, and “Scope” values and how are they used?

U-Prove allows for anonymous authentication and authorization without the involvement of an IdP. When a client generates a presentation proof 3 values can be optionally included, but I can't find ...
1
vote
0answers
56 views

How to use reflection attack in this simple protocol?

The following mutual authentication protocol has been designed to be resilient against reflection attacks. This is done by ensuring that the challenge from the initiator looks different from the ...
1
vote
0answers
148 views

Mutual Authentication Protocol based on MAC & shared secret key

I am quite unsure about how to approach this question, was wondering if anyone could give me a nudge in the right direction, I would be most appreciative! So I've learned about the 4-way handshake ...
0
votes
0answers
34 views

Is the QUIC protocol secure?

QUIC is a new protocol for video streaming, that can establish a secure connection in one round. It is used in Google's new Duo app for example. How does it work and is it secure (comparison with TCP ...
0
votes
0answers
17 views

Capture SATA Commands sent to controller

I want to capture commands sent to the SATA controller to protocolize when data is read and writen on a really fundamental level. I did find some commercial hardware based solutions that provice this ...
0
votes
0answers
34 views

How to update a non clientUpdateProhibited domain name?

So I recently learned about domain name locking after having found the *.co domains of a top web site weren’t protected against server and client updating/transfering. (while the .co tld offers all ...
0
votes
0answers
26 views

Kerberos Replay Attack- Scenario which server is not aware there is a replay attack

I'm researching about Kerberos protocol, I understand the logic of Kerberos but, I cannot solve that assumption. The case will given below: Servers check that the time stamps on authenticators are ...
0
votes
0answers
63 views

Ensure that a file can only be decrypted after a specific condition is not present

Are there any cryptographic schemes/protocols that would allow me to encrypt a file, make it publicly available, but ensure that it can only be decrypted when a specific condition is not present (I ...
0
votes
0answers
131 views

Payment Application Integration - Encryption or HMAC

Doing an integration with an online payment provider. Payment provider will be making a web request to my server to provide some information about the basket content. On my end there's no payment ...