Questions tagged [protocol]

A system of rules designed to allow the communication between two or more participants. The two main types of protocols are either stateless protocols (UDP) or stateful protocols (TCP).

Filter by
Sorted by
Tagged with
1
vote
1answer
861 views

Decrypt SSL/TLS traffic from a Java web applet

I am trying to reverse engineer the protocol of a chat written in java to implement my own client. The official client is a java applet embedded in the website so I thought it might use just https but ...
3
votes
1answer
432 views

How to analyze packets?

I have a packet that I want to analyze which consists 16 bytes. I can produce as much as of these packets needed to analyze. Even though packet does the same thing on application the data in the ...
2
votes
0answers
402 views

Finding the h.264 stream in a bytestream

I have a bytestream that contains h.264 bytestream packets in it. How can I find it? Output from stream: https://mega.co.nz/#!3llAnLaQ!pc1JPDpDOP6948F2x44LqeYm-p5CDnb91Da334rt4fY The first 13 bytes ...
1
vote
1answer
323 views

Identifying the pinout of an unknown protocol (Rollei 6000 Camera-Lens communication)

I would like to control a lens with an Arduino board, but of course, I first have to find out how the protocol works. Using an oscilloscope I was able to find out that the protocol uses High and Low ...
3
votes
1answer
949 views

Reversing serial RS485 half duplex bus protocol understanding

I have a master & slaves setup in which the slaves only respond when spoken too. I can snoop & record an existing master/slaves conversation. I have an extra slave device that I would like ...
1
vote
1answer
1k views

Books/tutorial on reversing protocol

Can someone recommend any tutoial or books on how to analyze unknown network protocol. Basically given the dumps of network traffic, I need some guide/examples on reversing the protocol.
2
votes
2answers
688 views

Reverse engineer DB25 protocol

I have a device that consists of a machine and a control head, connected with a cable with Dab25 connectors at both ends. The control head contains various buttons and dials for operating the dip ...
2
votes
1answer
131 views

Safecom TA-810 protocol (having trouble with the CRC)

(i've also posted this question on stackoverflow before i found out there was a specific stackexchange site for reverse engineering. My bad. Original post here: https://stackoverflow.com/questions/...
2
votes
2answers
1k views

Identifying protocol in a pcap file?

Is it possible to identify a protocol in a pcap file? I have a file which is a capture of data going between my phone and an IP camera, and I'd like to identify the protocol. I am using the app "MEye" ...
3
votes
0answers
124 views

CRC with OR but seed differ every time the protocol restart

It's some days I'm trying to understand how this protocol works without any success. I need some help. Basically I'm sniffing an UART signal. 115200 8N1 I understood what's happening under the hood ...
2
votes
1answer
787 views

How to identify HTML5 geolocation protocol of a browser? [closed]

I've been trying to figure how a html5 browser like chrome or firefox performs geolocation under the hood but I'm running into some difficulties. Difficulties To be more precise, I want to know what ...
2
votes
2answers
264 views

Understanding a messengers protocol encryption

For my own personal curiosity and development (building a bit of code mimicking the protocol), I am trying to figure out what the communication protocol encryption is made out of in a particular chat ...
4
votes
0answers
865 views

How to find a login packet structure (client-side only)? [closed]

As Google did not yield any results, I decided to ask it here. I'd like to reverse the login sequence of a game (using gamespy). In this login sequence, first the game uses the gamespy protocol (...

1
2