Questions tagged [handshake]
The handshake tag has no usage guidance.
78 questions
-1
votes
2
answers
3k
views
Interpreting SSLLabs Handshake simulation results
While testing SSL/TLS details on ssllabs.com for a website, the Handshake Simulation part contains:
TLS 1.2 > http/1.1
TLS 1.2 > h2
For eg:
What do these things mean? I couldn't find it ...
- 107
1
vote
2
answers
307
views
Key reinstallation attack how does it work without a pre-shared key?
The author of the key reinstallation attack released scripts on Github to test AP and clients.
To test the clients, you have to connect to a fake AP but you still need to know the pre-shared key. Of ...
- 131
0
votes
0
answers
1k
views
TLS Pre-master key [duplicate]
If I have access to the pre-master key of a TLS handshake, is it possible to decrypt the rest of the handshake following this?
If so, is it possible to get the pre-master key while it is still not ...
- 1
0
votes
1
answer
535
views
Can do I brutefore wifi password with handshake without wifi detection? [closed]
I have captured handshake but now I want to bruteforce wifi without detection it (in different place). Is it possible? If yes, how to do that?
0
votes
0
answers
215
views
Identify SSL invalid handshake using Wireshark
I am doing a research on "Network flow anomaly detection" and use Wireshark for my work. I have a problem of identifying the packets with invalid SSL/TLS handshakes. Is there a way/algorithm to detect ...
3
votes
1
answer
475
views
Is it possible to make HTTPS 0-RTT with help from DNS?
This article gives an implementation of encrypted SNI where a public key is retrieved from the DNS. It feels like cheating but imagine this: If the server publishes its certificate on its DNS record, ...
- 1,693
0
votes
1
answer
899
views
How does Authenticator gets the PMK which is used to calculate PTK?
I am trying to setup a Supplicant- authenticator and AAA server to perform EAPOL mechanism.
I am able to successfully completed the EAP authentication procedure but 4-way handshake was not initiated ...
3
votes
0
answers
245
views
How does WPA3 provide forward secrecy?
Someone told me that in WPA2, forward secrecy is achieved by generating ephemeral keys through the handshake’s nonces, but I couldn't find how WPA3 achieves it exactly (could not find info regarding ...
- 129
0
votes
1
answer
3k
views
Finding wpa2 key length
Is it possible to determine WPA key length through a successful handshake?
Below is a screen capture showing the packet capture session of interest as displayed in Wireshark:
My question came from ...
- 9
7
votes
2
answers
21k
views
What is the Session ID parameter indicate in Client Hello and Server Hello messages
I was trying to understand the TLS handshake in depth. I set up Wireshark and captured the github.com traffic. While inspecting the Client Hello and Server Hello, I found a parameter Session ID.
...
- 1,472
2
votes
1
answer
619
views
TLS 1.2 Missing Finished Message
I'm setting up a TLS connection for the purposes of sending secure SIP. The remote gateway (Twilio) doesn't always send a finish message and as such those requests fail. Everything else appears to ...
- 201
1
vote
2
answers
4k
views
Where is Hashing Used in the TLS Handshake
I understand the basic steps in the TLS handshake. My question is, where and how does one-way hashing fit into the steps below? Is it the session key that is hashed? Many texts mention that the ...
user179462
0
votes
1
answer
205
views
How SSL Handshake recognise any attack
I already know that a replay attack on an SSL handshake is ineffective, but if we suppose that an "intruder" has listened and has got all of the information from a previous handshake, how will the ...
- 11
2
votes
0
answers
401
views
Why WPA2 did not design a PTK based on asymmetric cryptography?
I was shocked to learn how the PTK is crafted from the PMK in WPA2 WiFi.
PMK is made with crypt_hash(SSID + PSK). OK, seems good.
Then, the client and the Access Point (AP) make the famous 4 way ...
- 1,368
2
votes
2
answers
2k
views
Do TLS standards require the server-side preference to always be used when negotiating ciphers to use?
Someone told me the other day that the TLS standards require the server-side to always have the authority to decide which mutual cipher to use when negotiating with a remote client.
This makes sense,...
- 3,498
2
votes
0
answers
170
views
What forces SSL exchange to require my smartcard to finish handshake
First, I hope that this is a legitimate question because it is spawned by what I am experiencing and what is happening. The environment is as follows... I have an apache reverse proxy, that I stood ...
- 21
3
votes
1
answer
1k
views
What are the factors making a WPA2 handshake suitable for cracking?
Days ago I was dumping handshakes of my APs using airodump-ng. I would later use aircrack-ng to crack them using wordlists which would purposely contain the passphrases. However, I noticed that some ...
- 131
0
votes
2
answers
496
views
Why not encrypt TLS handshake?
this is my first question here, I've researched this briefly but couldn't find any satisfying answer.
TLS handshakes are being sent over the wire unencrypted. This way someone that eavesdrops can ...
- 3
2
votes
1
answer
689
views
In TLS 1.3 handshake, can an internal error at the client be interpreted as a decrypt error at the server?
In TLS 1.3 handshake protocol, the client sends the ClientHello message to the server. The server then sends back the ServerHello message followed by some encrypted messages. The client then computes ...
- 73
4
votes
1
answer
466
views
Circumventing Netflow's visibility on SSL traffic
In a SSL handshake, the hostname is visible most of the time as it is needed to validate the certificate over HTTP. Netflow is thus able to pick up the common name from the certificate exchange, ...
- 739
1
vote
0
answers
585
views
SSL/TLS handshake potential vulnerabilities [duplicate]
After handshake one could be assure that data are encrypted and secure.
But before that, handshake parameters are transferred via not secured channel. One could be MitM during the handshake procedure....
- 133
1
vote
0
answers
408
views
what is the logic in choosing a certificate chain during a "server-hello" message in a SSL/TLS handshake
In a client-server ssl handshake, my server sends a certificate chain back to the client in a server-hello message. But I want to understand as to how that particular certificate chain is getting ...
- 11
3
votes
1
answer
18k
views
HandShake TLS- Certificate Unknown
I have added the necessary certificates to communicate a web service by TLS, both the client and the server added the certificates to the keystore, but in the handshake, certificate unknown is ...
- 165
1
vote
2
answers
296
views
Decide for client certificate auth in https based on hostname or url
Let's assume this (made-up) scenario: I install a webserver that reacts on two hostnames (anonymousserver.com and authenticatedserver.com)
I would like the following behaviour:
If the webserver is ...
- 121
1
vote
2
answers
4k
views
Airodump-ng doesn't capture handshake or sees any devices connected on Kali, but captures everything on Backtrack. How to fix it? [closed]
I ran into a problem in using kali linux system.
Kali doesn't allow me to see any devices connected to certain spot or capture any handshakes, I know that it can capture them(and see connected ...
- 11
1
vote
1
answer
1k
views
Sniffed SSL/TLS decryption : handshake necessary?
I read some topics where people claim to be able to decrypt SSL/TLS communications just by having the private key of the recipient.
But, I recently learned that a public key can, but should never ...
- 25
3
votes
0
answers
634
views
Raspberry Pi (Raspbian) not capturing WPA2 handshake with Aircrack-ng [closed]
I've been using Aircrack for a short time now with my Alfa wfif adapter on my laptop and it's been working perfectly. However when I try and do the same thing on my Raspberry Pi it's having issues ...
- 31
2
votes
4
answers
17k
views
How long til a 4-way handshake is captured with Aireplay-ng
I've got a TP-Link TL-WN722N wifi adapter which I believe allows monitoring/injection to a network (was reassured by the comments of other users).
When I follow a guide by Vulnerableuser I can get to ...
- 145