Questions tagged [protocols]
A description and set of rules for the ordered exchange of structured information designed with the goal of protecting the security of the system.
317
questions
10
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9answers
4k views
Can proprietary protocols be considered as secured?
I am new to the info-sec industry and was recently tasked with evaluating the communication protocols used by my various subsystems.
So it was stated in the requirements that the systems have to ...
1
vote
3answers
124 views
Standard for encrypt files before transfer them over internet
I know there are some standards for transferring data securely such as HTTPS for web applications, or SPC & SFTP for secure file transfers.
Encrypting files using PGP is a way to encrypt files ...
1
vote
1answer
154 views
Could someone the real IP address when using tunnel protocols like ngrok, localtunnel or serveo?
Could someone get the real IP address that is hidden behind the URL generated by tools like ngrok, localtunnel or serveo?
0
votes
1answer
88 views
Should I be seeing network management protocols on 'user' subnets?
When performing a passive packet capture of a network, I have seen a large amount of traffic being broadcast using different protocols. These protocols are primarily used to perform some kind of ...
17
votes
2answers
3k views
Can my ISP see which VPN protocol I am using?
I know that my ISP can detect when I am using a VPN, but can it see which protocol I am using?
1
vote
1answer
135 views
Why isn't U2F's CTAP protocol forwards-compatible with FIDO2's CTAP protocol?
I've been trying to find the major differences between "U2F" versus "FIDO2" two-factor authentication standards. Reading some of the articles posted by different companies and even ...
0
votes
0answers
78 views
Secure connection between two applications on different systems
I have two applications that are running in different servers, the first one is an admin web application that has a client mobile version, and the second one is just a python process that manages ...
1
vote
3answers
348 views
Defending against Wiegand sniffing (ESPKey) attacks in RFID card readers
It's known that card readers, which use the Wiegand format, can be attacked by installing a sniffer, such as an ESPKey. After the sniffer is installed, whenever anyone uses the reader, their ...
0
votes
1answer
323 views
Can I elicit responses from "any remote host" on "all protocols" if I want to?
An nmap scan of my test computer returns a result of “5357 / tcp open wsdapi”.
After some research, this is something that can be exploited.
It is explained here that:
By default, WSDAPI will listen ...
0
votes
0answers
71 views
TLS client does not drop connection even when there are no suitable ciphersuites in the server ciphersuite list during handshake
I have two Windows systems, and I want to establish an encrypted TCP/IP communication between them. Specifically TLS 1.2 or TLS 1.3.
I have configured in both systems the list of allowed ciphersuites:
...
0
votes
1answer
85 views
Performing a simpler ssl handshake [duplicate]
Consider the following scenario:
client sends hello
server send a hello and its certificate
client generates a key and encrypts that with server's public key
server decrypts the key with its private ...
0
votes
2answers
226 views
How Wifi prevent hacking in the same network?
We all know that the client device and WiFi AP will perform the 4 way handshake to generate the session key (PTK). Here is the recap of the 4 way handshake.
1.Client device<-----ANonce-----WiFi AP
...
0
votes
2answers
153 views
How do I write my own authentication protocol and add that to OpenWrt? [closed]
I would like to add a ticket based authentication mechanism to my network. Can you give me brief idea where do I start, which language should i write the protocol in and how do i get those in my ...
1
vote
2answers
229 views
Can an ISP block BitTorrent peer discovery but not file transfer?
When I start new torrents, I find there is no traffic for hours. I switch to another network (a cellular data hotspot) and the torrents start flowing. I return to my usual network, and the torrents ...
1
vote
1answer
194 views
Can using web-based protocol handlers for protocols such as mailto: links be dangerous in any way?
My question is specifically about an option in Google Chrome under Settings > Site Settings > Handlers. I've read in the past that with desktop-based protocol handlers--such as Office Outlook or ...
1
vote
0answers
75 views
Detect use a private key by more than one or by someone other than the owner [closed]
I'm designing a protocol over the SSL but I faced a challenge. In the network each user takes a private key from authority. I want to just the owner can use his/her the private key. there are two ...
2
votes
1answer
197 views
Deauth not working on a certain network and I want to understand why
I've done some research for the past hour but I can't find a definitive answer to what is happening.
So I use a AWUS036NHA, put it in monitor mode, sniff everything, then sniff the AP I want to do ...
6
votes
3answers
8k views
Should I disable TLS 1.0 and TLS 1.1 support on my web servers
Currently, my webserver support
TLS 1.0
TLS 1.1
TLS 1.2
One of your single sign-on clients will move to TLS 1.2 on 1st April 2020. Can I remove TLS 1.0 and TLS 1.1 now? Or I need to wait till ...
0
votes
1answer
143 views
WiFi Router, current status of security options?
I'm about to buy a new WiFi router tomorrow (probably) & I'm wondering what kind of security features I should choose (Like: AES, WPA2, DMZ, TKIP, SPI, ...)
What is the current status of what is ...
1
vote
1answer
124 views
What is the problem with developing secure protocol on top of communication protocol without binding
I read that developing a security layer on top of communication protocol without any binding between them could cause an issue like MITM attack. I am having a hard time seeing how that could be ...
2
votes
1answer
145 views
What is extension intolerance in the context of TLS?
SSL Labs checks for TLS version intolerance and TLS extension intolerance. I've seen another answer on this site that covers version intolerance, but what does extension intolerance mean, specifically,...
1
vote
1answer
112 views
Cardholder info transmission between issuing and acquiring banks
Which data is actually transmitted between issuing and acquiring banks during various phases of a card payment transaction?
Specifically, does the Issuer tell the Acquirer any info (and which if any?)...
1
vote
1answer
151 views
SSH and the ECDH component
With SSH, most of my servers use ed25519 (the twisted Edwards variant EC) for authentication.
I was wondering, after authentication with ed25519, does SSH protocol 2 simple use ephemeral/ephemeral ...
0
votes
0answers
89 views
Is this symmetric key system secure?
I am creating a secure network data transfer system, and would like to know if there are any obvious flaws in this scheme.
Secrets
The secret is a password that is known to both clients. This ...
1
vote
0answers
121 views
Advantages of EAP Authenticator in EAP protocol
What is the purpose of using a EAP authenticator in the EAP protocol ? Since underhood, the authentication procedure is between the EAP peer and the authentication server, what is the advantages of ...
2
votes
1answer
241 views
Does the SSL record protocol encrypt the handshake protocol too?
As I know the first communication protocol which establishes between client and server in SSL is handshaking protocol and as this site says:
The SSL record protocol is used to transfer any data ...
0
votes
1answer
101 views
Thought process on Network Protocol Attack
I'm preparing for an introductory information security examination in university and this is one of the tutorial question on Network Protocol attacks. I tried (a) and came to this conclusion:
Since ...
2
votes
1answer
140 views
Is this key exchange algorithm secure and valid? [closed]
I'm writing reliable UDP implementation and I want it to be secure. Also, I want to make use of elliptic curve cryptography. I don't have the proper education to really understand the math behind this ...
1
vote
1answer
94 views
What protocols are authenticated by Active Directory?
Most of the new authentication solutions (IDaaS) are focused on HTTP (for example implementing SAML and OIDC). What protocols does Active Directory support, that are not normally supported by IDaaS?
2
votes
1answer
231 views
Access Control Lists - Why block a port rather than block a protocol?
I am studying for my Security + exam. I have just learned that ACLs can be designed to block ports and/or entire protocols. The book I am reading states an example:
"if you want to block HTTP traffic,...
-1
votes
2answers
149 views
technical difference between TLS and a certificate [duplicate]
I don't quite understand what the difference is between TLS and a certificate. TLS secures the transmission by encrypting the data. So normally no man in the middle attack is possible and nobody else ...
5
votes
0answers
2k views
Open source KMIP Server in a production-level environment [closed]
I need to use a KMIP server for a project and searched for an open source solution. The only viable options I found are PyKMIP (https://github.com/OpenKMIP/PyKMIP) and KMIP4J (https://sourceforge.net/...
1
vote
3answers
293 views
Remote authentication with random number challenge vs timestamp? [closed]
Many remote-terminal to server authentication protocols use random numbers sent by the server as a challenge that the user will encrypt and send back to the server. This way an adversary cannot ...
3
votes
0answers
94 views
Good book detailing the security aspects of Microsoft Active Directory [closed]
I am attending training later this summer related to AD pentesting. As such, I wanted to ask for book recommendations which detail (in full or in part) the security aspects of Active Directory. The ...
0
votes
0answers
298 views
In Kerberos authentication protocol, why is the TGT encrypted using the user's key Ka?
When the user first logs in, he fetches his TGT from the KDC along with the session key. I get why Sa (session key) is encrypted with Ka (user's key). But why is TGT also encrypted with Ka. TGT is ...
0
votes
1answer
78 views
Security element that relate to breaking protocol
I am working on evaluating an unsecure protocol. I am trying to categorize the vulnerabilites according to some commonly accepted security elements like the ones specified in the CIA triad or the ...
3
votes
1answer
102 views
Verifying Security of a Custom Network Protocol
I’ve designed a custom network protocol using high-level LibSodium primitives for authentication and encryption. The purpose of the protocol is for a game, and the security is to ensure only paid ...
0
votes
1answer
80 views
Is there such a thing as an Authenticated Protocol?
I need two devices to communicate in plain sight and I want to know what to ask for. Nothing is secret so no need to encrypt. However, I need the source to be authenticated to prevent bad actors from ...
1
vote
1answer
74 views
Criteria for selecting fields and network protocols for fuzzing
I want to test a specific device connected to different networks using fuzzing. For each network interface, there are different services listening using different protocols, with open specification.
...
2
votes
2answers
117 views
Trouble trying to understand SET protocol
This is the first class I'm having on security and one of the concepts discussed is the SET protocol. I've read about it in many different sources and although I came into many unknown terms, after ...
1
vote
1answer
930 views
How does the KeeLoq block cipher work?
Note: This question is follow-on from comments on this answer that were broad enough to be a separate question.
As far as I understand, KeeLoq is a block cipher designed for use in the automotive ...
1
vote
1answer
1k views
OAuth 2.0 when and how to use the client id and secret
The OAuth 2.0 protocol uses the client id and secret. It considers the client id to be public while the secret is private. Anyway it also considers to generate the client id randomly with a certain ...
1
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0answers
66 views
Formal verification of security protocols
When you try to verify security protocols you have to do a lot of different steps like formalizing a simpler version based on a extremely complex real protocol using some extended Dolev Yao model. ...
3
votes
1answer
379 views
How do I know that the request and response is using encryption protocols in burp suite?
I know these things can easily be done on wireshark, tshark, etc but is it possible to know that the request I forwarded and the response I received is using protocols such as TLS, TLSv1.2, TCP, HTTP, ...
-1
votes
1answer
98 views
What are the flaws in this security protocol between client and server? [closed]
Here is my security protocol for the use of a service provided by server. It utilises a symmetric key:
Client requests to use a service
Server sends back nonce
Client sends back nonce encrypted with ...
1
vote
3answers
364 views
Why is it required to HMAC riv in HDCP 2.3?
In HDCP 2.3 (pdf) during the Session Key Exchange, the HDCP transmitter sends also the 256-bit HMAC of riv (HMAC-SHA256(riv, kd)).
Why is it required? Does it prevent any attack?
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0answers
71 views
Kerberos Protocol Centralized Server
If a small company is expanding with various branches across the country, how would the kerberos centralized server be configured? Are the new users assigned new ticket granting servers or are they ...
1
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0answers
97 views
Provide email author origin integrity [closed]
If i receive an email, how does my computer verify the author origin integrity using the digital certificates? Does it use any specific protocol for this?
1
vote
1answer
116 views
Are there other methods than fuzzing for black box?
I find fuzzing a bit to basic method if it comes to black box apps. I am specifically interested how to find a vulnerability in network protocols. I have read "Attacking Network Protocols" but only ...
2
votes
1answer
140 views
NAS with a public IP and multiple file sharing services – security concerns
I've ‘inherited’ (it's now my responsibility to take care of it) a WD My Cloud EX2 with a public IP and since it's exposed to the internet, I want to make sure that the data and other machines on the ...
