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Questions tagged [encryption]

Process of encoding information such that decoding requires the knowledge of some secret (a key). This tag covers questions about obfuscated and encrypted programs, or tools, but higher level questions may get better answers on Cryptography Stack Exchange.

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Sniff Bluetooth traffic using Fitness Tracker

I am attempting to sniff the Bluetooth between the fitness tracker(GOJI ACTIVE GFITBK20 Activity Tracker) and the application(Goji Active) installed on the phone but I am unable to see any health ...
user309729's user avatar
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108 views

How did a cheap amazon RF key managed to clone original key with rolling codes?

I have a garage and I have the original key which is 433MHz and the specifications say it is a rolling code. Here is a table of the specifications: Range in open field (m): 100 Frequency: 433.92 MHz ...
Skywalker's user avatar
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1 answer
45 views

Is there any way to read the data in STC11F02E?

I need to read the data from the STC11F02E microcontroller. Is there a way to do this?
akifh's user avatar
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Decoding API headers of unknown encoding?

I'm using mitmproxy to monitor facebook messenger app traffic on my android. Firstly I had to enable whitehat settings to use it. After that I found some request headers has some unknown value in body....
Wojciech Wolski's user avatar
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60 views

Unknown file analysis

I have a file, which supposedly contains an output of CRC32 hash. Problem is, file has no extension, type file (cat analogue) returns mangled gibberish, i.e. ёя╫жW▲{═Sb╨y¶|ИМ▐ВQ╙l9k╖▀у║?╩↓b☼┐R. TrID ...
flying_meatball's user avatar
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0 answers
51 views

How to use reverse engineering to learn how facebook send messages?

I would like to know how I can use reverse engineering technique to learn how Facebook/messenger send messages? I were analyzing my developer tools network tab, but couldn't find anything. Fiddler ...
innocent98's user avatar
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0 answers
83 views

How to get decryption keys from an offline player?

I am just starting to learn reverse engineering from lena lectures. I have 2 encrypted sample vids and an offline player which is able to decrypt the videos and play them, is there any way,I can get ...
No One In particular's user avatar
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0 answers
60 views

How to replicate this encoding algorithm

I am writing a helper script at work for when new people start work and need help setting up respective applications - the application will write configuration files to be loaded into the various ...
Chokehold's user avatar
1 vote
0 answers
74 views

Reverse engineering from sets of data

I'm starting in the world of reverse engineering, for educational purpose, by studying a (supposed-to-be) relatively simple system as black-box. The system uses a NFC Mifare 1k badge to store ...
Jib's user avatar
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0 answers
57 views

Attempting to auto reverse XOR

Does anyone know of any helpful tools or a way to automate decryption of XOR in IDA? I know that they have a built in function to do some bare XOR encryption but this one seems a bit more ...
Babyhamsta's user avatar
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339 views

How to decompile python .exe who compiled by Nuitka?

i have one file named hello.exe and compiled using nuitka by cmd : python -m nuitka --mingw64 --windows-icon-from-ico=ICON.ico --onefile --windows-company-name=NAME --windows-product-version=1.0 --...
Teswadha's user avatar
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76 views

How to decrypt and analyse data from desktop application

I have a project where I need to analyse some data from a desktop application (WeChat) on Windows. More specifically, I am looking to extract URLs when I search for articles using a particular keyword....
Nico's user avatar
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41 views

Help on identifying encryption/encoding scheme

I am trying to find the encryption used in a legacy database. The db is from 2003, and it is stored on a dbf (FoxPro) file. The following are supposed to be ZIP numbers, more specifically, are ...
Grigoris L. 's user avatar
1 vote
0 answers
88 views

How to identify digital signature and sign executables with it?

There is an embedded platform which requires signing binary executable file for them to be loadable onto CPU from flash. Signed executable consists from signature (first 40 bytes) and unsigned ...
AAA BBB's user avatar
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64 views

Decrypting encrypted PHP?

I was playing around with a tool I use, and hit a weird error with their wrapper script, so I thought I'd go see what it was doing. Only to discover something I've never seen before. The script looks ...
XeroxDucati's user avatar
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0 answers
142 views

Find encryption method, Decrypt Non-Cyrillic/Non readable characters

I have an old file, I know what it contains, I know that this is encoding without a password, any privatekey and secretkey. This is some kind of encoded file/string, possibly converted several times. ...
wh1tedance's user avatar
2 votes
0 answers
61 views

Figuring out the algorithm for an NFC reader, which displays values increased by 1.52 times

I have two NFC readers, reader A reads card ID numbers according to the ISO standard and the algorithm is publicly available. Reader B is from a Canon printer. The card numbers read by reader B are 1....
张星星's user avatar
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0 answers
28 views

How to locate the code used for encryption of qrcode message in apk file

When I scan a QR code in this app it gives an encrypted message. I want to figure out what method this app used to encrypt their QR codes. I used Dextojar to look at the source code but couldn't ...
Menno van de Linde's user avatar
12 votes
3 answers
4k views

McDonald's receipt codes

Receipts from McDonald's in the UK include a code that allows you to complete an online survey as shown in the attached image (in the green box): After gathering and comparing several receipts I have ...
user7290573's user avatar
1 vote
1 answer
727 views

How can I extract the password from an installer/self-extracting archive?

I have an installer/self-extracting archive. The executable file has an embedded ZIP archive into it (like many other installers). The ZIP archive is encrypted with a password. The installer DOES NOT ...
ARGYROU MINAS's user avatar
1 vote
0 answers
154 views

How to identify encoding algorithm used

I'm using a calendar application, and each date is encoded. I would like to know which algorithm has been used to do this. Example: I have a date: 05-10-2023 ('mm-dd-yyyy') and it's encoded string is ...
JigolKa's user avatar
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2 votes
0 answers
49 views

I want to learn how to program by orienting myself to the task of reverse engineering

I have to learn programming from scratch and I want to orient my learning in order to be able to reverse engineer to break obfuscators. It would be helpful if you could recommend me what languages, ...
Yosho's user avatar
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3 votes
0 answers
76 views

How to read the content of these files?

I am looking for a way to read the content of these two files. If that is possible, please let me know. Google Drive link for the files
zhanshi123's user avatar
3 votes
0 answers
207 views

How to decrypt query string of an url

I need to decrypt the encoded part of query string i.e. Q7eM0euncHNyrhJPjN06lw== and sWmYdMUi01BJplzumEaxTw== from the following urls? https://XXXX/deed-check/view-deed-summary?encApplicationId=...
Learner's user avatar
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1 vote
0 answers
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can sha1 hash of file converted to sha2 hash?

I have a phone database /data/user/0/com.miui.gallery/databases/gallery.db containing information such as exif data and file name. there is a column sha1 containing value ...
alecxs's user avatar
  • 113
6 votes
1 answer
548 views

Decrypt the cookies stored by the MS Teams desktop client

I am creating a digital forensic tool that gets all data of user from different platforms. I successfully have done extraction for Teams website but I am unable to do so for the desktop app. So far, I ...
farhan jatt's user avatar
2 votes
0 answers
496 views

Extract assets images from a games APK [closed]

I'm trying to remove some images from an android game, but when I try to view them in a hexadecimal viewer I see that they don't contain a PNG header, so I can't view them through the python PIL ...
amateur's user avatar
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3 votes
4 answers
558 views

Reverse Engineering CTF help

I am having trouble figuring out this microcorruption challenge in the link below: https://microcorruption.com/debugger/Halifax Basically, the 0x7f interrupt has been disabled so I must reenable it ...
PurpleHacker's user avatar
6 votes
1 answer
2k views

Reversing an RSA function throws pkcs decoding error

I'm working my way through reversing a toy challenge, and I find myself stuck. The app is pretty simple, it spits out a blob of text (e.g. "3b880a90e476d66569d9d5dfb5cd755af3f..."). Dumping ...
XeroxDucati's user avatar
2 votes
0 answers
44 views

Looking for some help for decoding a signal from IR remote

The following signal has been captured from a remote that I suspect code for at least 3 things: the ID: 107, the item: 1, and the color. I didn't change the ID and item here (although I could do so ...
Vincent's user avatar
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3 votes
0 answers
167 views

Reverse-engineering 24-bit to make the lock system recognize NFC cards as their own

I own a lock system that uses SRI512 cards. My supplier (manufacturer of the locks) sells the cards at a very expensive price, so I decided to buy them online. Once they arrived, when I tried to write ...
Andrea P.'s user avatar
2 votes
0 answers
184 views

Find out used encryption in an SQLite database

Is it possible to see from a string which encryption an SQLite database uses? Let's say, I can open the database and see this: O45dTrA6NKG6SYeCENMwV7nxp66HR9lbhK12NGHgVnzEhebMjMJUhTmConk= - how do I ...
c1ph4's user avatar
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2 votes
0 answers
146 views

How would I decode this XOR Cipher

I have been given a XOR Cipher which is a bunch of hexidecimal looking charcters. This cipher is: fa ce fd d3 fa df ed d3 fa ce d3 d3 fa de df d3 fa de df d3 fa de f9 d3 fa ce f9 d3 fa de f1 d3 ...
DrJacoby's user avatar
1 vote
0 answers
149 views

Where can I find the hashing algorithm in source code?

When I submit login credentials in an Android Application it POSTs an encrypted string to an API endpoint. For example, if I enter the following email & pass : "[email protected]:abc" it ...
Dino's user avatar
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0 votes
1 answer
194 views

Reversing encrypted file with unknown extension

Hello to everyone in RE section! I have a binary file with questionable extension(meaning idk if its exe/dll). Multiple variations of this file can be acquired throught connection to remote CDN via ...
Roman Avdeenko's user avatar
0 votes
1 answer
191 views

Identifying the source of encryption used by UDP packets in a PCAP file

I have a PCAP file (mediafire link to the file) which basically represents packet captures between 2 machines running the same game connected to each other via LAN inside RPCS3 using RPCN. One of ...
PirateApp's user avatar
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2 votes
0 answers
20 views

Encoding scheme identification of the following communication message

I'm trying to RE an app for educational purposes. So here is the behavior of the app. When the app starts, it communicate with a server in plain tcp and based on those tcp messages, it either work as ...
user41419's user avatar
2 votes
0 answers
390 views

Where can I find the encryption algorithm for this POST request in an Android APP?

I have an Android app for which I need to mock an API call outside of that environment. I successfully killed the certificate pinning on this app with Frida in order to access the URL and more, but ...
Miguel's user avatar
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0 votes
0 answers
81 views

Password encryption when transferring from master to PLC

So, there is a PLC and a SoftMaster program to work with it. The PLC works according to the XGFenet protocol. When connecting to the PLC for the first time in SoftMaster, a password must be entered. ...
Pigeoncatcher's user avatar
2 votes
0 answers
8k views

Extracting ZTE F670L router's config.bin file

I want to enable telnet in my router (ZTE F670L V9.0.11P1N20D), So, I backup my router and i have a file config.bin, Size 23.5KB. I fired up kali and when i issue this command: $ file config.bin ...
Chirantan's user avatar
1 vote
1 answer
2k views

Where can I find the encryption algorithm in source code?

When I submit a Customer Reference ID in an Android Application it POSTs an encrypted string to an API endpoint. For example, if I enter the following CR ID : "SR-54585482" it POSTs the ...
Cruzer Blade's user avatar
1 vote
0 answers
360 views

How to decode/decrypt/decipher an unknown 83 bytes long UDP payload?

I have an unknown 83 bytes long payload which I would like to decode/decrypt/decipher… I got an alarm system from vendor www.jablotron.com, an old device, but it works perfectly. It’s JA-63 with a LAN ...
user avatar
1 vote
1 answer
716 views

Decoding API response of unknown encoding?

I'm using Proxyman to inspect the api requests of an app I use. Most of the data is returned in plain JSON blobs but there is one response which is returning data encoded/encrypted. How can I go ...
Nerdsie's user avatar
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1 vote
0 answers
691 views

Decrypting my router config backup file

so I have this ONT router/mode (ZTE F660) provided to me by the ISP, it's interface contains very little settings and I wanted to see if I can get anything useful from it's config backup file. The ...
Veoxer's user avatar
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0 votes
0 answers
64 views

is it possible to get code out of chipset through reverse engineering?

for example, encryption/decryption mechanism was inbuilt in a chip, to get the code that performs this mechanisms, is there some ways you can get this code through reverse engineering? what tools and ...
hanan's user avatar
  • 309
0 votes
1 answer
20 views

Issue in opening a file type after unzipping

I downloaded a file from this link https://storage.cloud.google.com/gresearch/smallcnnzoo-dataset/cifar10.tar.xz, and I successfully downloaded the archive file.I unzipped it using 7-Zip. After ...
ayesha shah's user avatar
1 vote
0 answers
605 views

Decrypting .PNG files from Chinese mobile game

Amateur here. I'm working on decrypting a couple of .PNG files extracted from an .apk of a Chinese One-Punch Man mobile game. They're identified as .PNGs by Windows, but can't be opened by any ...
Sam's user avatar
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2 votes
2 answers
7k views

How can I decrypte the data in this SQLite Database file

I have this SQLite Database file https://we.tl/t-RwKqYyS3D7 When I open it in notepad++, I got some decoded strings. I was trying to clean it and show only the strings without the symboles but then I ...
M J's user avatar
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1 vote
0 answers
700 views

where can i find decryption key inside of the dll file?

I am testing a dll file , in a C# console app , and by the looks of it the dll file sends a web request with encrypted and then encoded values to a remote server. after intercepting and analyzing the ...
Umer's user avatar
  • 111
1 vote
0 answers
98 views

How to create an algorithm in C...(or C# or C++, basically in "a programming language")

After a LOT of sending challenges and recording the responses I've 'broken' the "encryption" in my car's immobiliser...the reason for doing it is so I can use the engine and transmission in ...
joehodgy's user avatar

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