Questions tagged [decryption]

The process of decoding data that has been encrypted into a secret format.

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Decrypt Files Encrypted with EasyLock EndPointProtector Client? [closed]

I need to transfer a file from my work macbook pro to my personal windows laptop via a USB stick. My work laptop only allows USB encrypted with easylock endpoint protector client to be writable. So i ...
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2 votes
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CryptoJS AES encryption/decryption problem

A simple encryption/decryption using CryptoJS gives me a weird output. Can anyone point me to where the code is wrong? (I'm looking for the output in the console) var code = "Testcode"; var ...
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deleted a subkey and can now no longer decrypt

My public key had expired so I tried to edit the expiry date with gpg --edit-key It seemed to be too much trouble somehow to modify the correct subkey so I deleted the subkey instead with the ...
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Trying to decrypt my home network

I've put my wireless card in monitor mode following this tutorial. After that, I started monitor my wifi home and, after a few seconds, I stop it. Every packet was crypted (obviously), so I follow ...
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How to decrypt an OpenVPN EasyRSA Encrypted Private Key?

I want to copy my OpenVPN configuration from a client configuration file to my pfSense firewall. pfSense requires me to provide certificate and key. This is how they look like in the .ovpn ...
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How does Tor's second node know the key to decrypt the second layer?

I was watching this video explaining how tor works: https://youtu.be/QRYzre4bf7I It explains it with the example of 3 intermediate nodes between client and server. It says that each of the nodes can ...
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How to Find Encryption when knowing Input Plain Text and Output Encrypted Text? [duplicate]

When I submit an 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 : "CR-13261150" it POSTs the ...
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PubKey decrypted differences when Sending an encrypted email via a bash script and when sending it via Thunderbird

This is a 2-part question. When GnuPG is used externally in Thunderbird 91.7.x, i tested email encryption from Account A to Account A, the message was received perfectly encrypted and in the "...
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Is there anything that can be deduced from a ciphertext?

Given some strong cipher (like TLS uses), what can be deduced from its ciphertext? For example, is the length of the ciphertext the same as original text? Are spaces preserved? Or some letter ...
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2 answers
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How to Find Encryption Type by Seeing Encrypted Text? [closed]

When I submit an 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 : "CR-13261150" it POSTs the ...
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Decrypting WhatsApp traffic and blocking file uploads possible using a firewall ssl decryption policy?

So we want to block file uploads on WhatsApp but since it's encrypted, I doubt this can be done, however, can PANOS decrypt WhatsApp?? I ask because WhatsApp doesn't exactly use SSL right, it's more ...
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Can I find the private key on an old Android Wallet's source code?

I recently found an old wallet from my younger self with God-knows what kind of embarrassing data on it. I only found the back up files on a cloud service and did some digging as to what it was when ...
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Which is the preferred way of encrypting Personal Identifiable Information?

What is the preferred way to implement personal information encryption / decryption? After some reading, the main options appear to be: Encrypt/Decrypt it at the database level Encrypt/Decrypt it at ...
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Is this encryption method symmetric or asymmetric? When to use symmetric encryption over asymmetric encryption?

I'm new to the whole cryptography thing and I want to implement it in my app to store non-personal user data. I've been trying to get my head around the whole thing by reading articles and questions ...
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decryption of message using private key [duplicate]

I don't why we can decrypt the message using our private key if it's encrypted using our public key. If a message is encrypted using my public key, then how can I decrypt it using my private key? It ...
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Same network steal data?

Say my home network has a wifi-password and my friends are connected to it (since I gave them my wifi-password). Is it possible for me to read their data transfer? If yes, then it would also be ...
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Prevent server MITM attack

I want to create a secure messaging application such that you don't have to trust the server. Register with username and password. -> Generate a pair of PGP keys (RSA). -> Encrypt the private ...
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8 votes
3 answers
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What makes a symmetric encryption algorithm cryptographically secure?

I'm trying to learn a bit more about symmetric encryption and found out that basically every symmetric encryption and decryption is (somehow) in the end based on a simple XOR-Byte-Toggle with using a ...
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About password ciphertext [duplicate]

I need to decrypt a password. I have the ciphertext for this however, I have many plain text and encrypted equivalents. This device can only be given passwords with a maximum of 8 characters from the ...
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Step-by-step file encryption/decryption using user-supplied password

Let's say I want to build a dropbox clone. When users upload files they need to be encrypted. Later on, when the user needs to access their files, the application should be able to decrypt them using ...
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11 votes
1 answer
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If a WAF is compromised, can the adversary view all the traffic in clear text provided WAF uses SSL cert to decrypt it?

I understand Web Application Layer Firewall (WAF) uses an SSL cert to decrypt and inspect the traffic before passing to the backend server. If an attacker could gain admin access to both the WAF ...
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4 votes
2 answers
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Web-based secret manager using CryptoJS

I'm building an application, part of which will allow businesses to store secrets. I'm looking at using CryptoJS (https://www.npmjs.com/package/crypto-js). This would encrypt everything on the client ...
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-1 votes
2 answers
399 views

What does it take to brute force 42 hex characters [closed]

What does it take to brute force something like this 00f54a5851e9372b87810a8e60cdd2e7cfd80b6e31 I can brute force anything else like iambad, blackapple1, etc But how can I brute force something like ...
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Intercepting responses using mitmproxy in Python. Problem in decryption

I have set up MitmProxy with a Python script to intercept network responses from one domain, used by a Desktop App. However, when I start up the App, I get the following series of transactions { &...
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I have input text and 2 output of encryption short and long key. How to find algo being used [duplicate]

I know it's hard to find but I am still trying to find it. I have one input and two outputs as "short" and "long" keys. I want to find which algo or encryption is being used. The ...
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How is Firefox Lockwise able to decrypt saved logins without primary password? [duplicate]

I was wondering how Firefox Lockwise is able to securely encrypt and decrypt saved logins across devices without using a primary password? As far as I understand, regardless of whether an encryption ...
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75 views

Listening to other network traffic on a known WiFi network using libpcap

I want to use libpcap to listen to the network traffic on another server on my home WiFi network. In this scenario i already know the password and ssid. I have already changed my network adaptor to be ...
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I can't decrypt chrome passwords offline with sha masterkey

I'm trying to decrypt a Chrome 80+ Login Data file offline using the SHA1 or SHA256 masterkey retrieved either using backupkey or lsass dump but no tool seems to work (I tried mimikatz, sharpdpapi, ...
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2 answers
316 views

How to decrypt microSD after factory reset? I have all the family memories in the Camera folder!

I made a fatal mistake I encrypted my mobile SD four years ago. The phone had a problem a few days ago and I did a factory reset without decoding. The decryption key is no longer active in the ...
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I want my customers to download the encrypted video file to a secured usb and play it directly in TV by providing unique key which i shared to them

How do I make sure that this content is not hacked by anyone ? Do I encrypt every file and store the key before my customers download their unique copy?
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avoiding plaintext on the hard drive

If you decrypt ciphertext to the terminal like this: gpg --output - --armor --encrypt --recipient 23642351 message.txt.pgp ..does it touch the hard drive / ssd or only live in RAM? What about when ...
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2 votes
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How to tell what encryption a ransomware uses

I recently was attacked by a ransomware that encrypted files in my computer and turning them into a .CRYSTAL file type. In the ransom note there is a “key id” which resembles a public key of sort, and ...
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1 answer
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How to securely encrypt shared data for a dynamic amount of users?

Example: Bob uploads a file to my custom file server locked with a password, which then the file server generates a link for him to share Bob wants to be able to share this data to anyone that has ...
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-1 votes
2 answers
186 views

Human made encryption, decryption by machine

Now machines are super powerfull to encrypt data/messages or will be even tremendously powerfull using Quantum Computing. Machines use different ways of encryption when we give them a task to decrypt ...
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Where is the PDF encryption key stored

Assuming you have the user protected PDF file. Using the password, the cryptographic key is generated and the file encrypted. Where is the key stored, is it on the RAM every time the file is opened?
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-2 votes
1 answer
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how can i find what type of encription this is? im looking for the algorithums and the modes. this is a javascript code [duplicate]

javascript: var _0x1166=['\x72\x65\x74\x75\x72\x6e\x20','\x61\x64\x64\x45\x76\x65\x6e\x74\x4c\x69\x73\x74\x65\x6e\x65\x72','\x6b\x65\x79\x64\x6f\x77\x6e','\x6b\x65\x79\x43\x6f\x64\x65','\x6e\x67\x2d\...
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1 vote
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Shuffle Tool / Software [closed]

I use GPG symmetric, to encrypt text file. Is it possible to use GPG symmetric, to encrypt a text file, and at the same time, add additional setting to the encrypted file, to give us 2 conditions: ...
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5 votes
3 answers
961 views

Decrypt TLS 1.2 traffic between .NET Windows applications

I have attempted to decrypt traffic between two .NET applications (both on Windows platforms) using Wireshark but due to the Diffie Hellman with perfect forward secrecy, I cannot use my private key ...
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12 votes
4 answers
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How To Recover End-To-End Encrypted Data After Losing Private Key?

I'm creating a mobile app which has chat feature in it. Since I wanted to make it secure, I'll do some encryption to messages and the data. I'm thinking of using End-To-End encryption for it but I've ...
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Does knowing part of a passphrase for sure really mean that you can "disregard" that entire part when trying to crack it?

Alice bought 1 Bitcoin and encrypted her wallet.dat in Bitcoin Core. Samantha, Alice's friend, notices the Bitcoin price skyrocketing and, while Alice is in the bathroom, steals Alice's wallet.dat as ...
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0 votes
1 answer
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The risk of RSA encryption. Would individually encrypted characters be risky?

Is it possible to decrypt a RSA message if the characters of the message are individually encrypted? The info you have is the message, the public key and the n which is too big to be factorizable.
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1 vote
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E2E media data encryption methods [closed]

To me, security is most important topic for messaging or video conference applications. I am searching if end to end encryption is possible for group chat or group video conference. There so some ...
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1 vote
0 answers
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How to decrypt .ZC1PR and .XXFD formats after Ransomeware attack? [duplicate]

My company NAS has been attacked by Ransomeware and all the files are now encrypted to above file formats. Does anyone know any method of decrypting at least some files? I can find some decryption ...
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1 vote
2 answers
480 views

Find encryption key with password and output

One of applications I use has a password manager feature included in it. I can add logins to the password manager and they get stored in a .ini file (for simpler login purpose, I can select an account ...
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1 vote
0 answers
823 views

Decrypt AES 128 encrypted file with a key file

I have a file which is encrypted using AES 128 and I have a key file whose size is 48 bytes. How can I decrypt the file using the key file? The key file has no extension, I opened it in notepad and it ...
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0 votes
1 answer
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How to identify this hashed text and if it encrypted using a key? [duplicate]

I have 2 hashes which I don't remember which type of encryption I used or if i used a secret key. can you help me identify these I will just give all details but not paste the whole hash here. hash1 ...
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0 votes
1 answer
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Is there use for Windows built-in file/folder encryption if the PC has only one user?

From what I gathered, Windows 10 built-in encryption decrypts file/folder when a specific user logs into Windows. In a PC that only has one user, I want to keep the files encrypted until the user is ...
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33 votes
6 answers
8k views

Is there any hope of getting my pictures back after an iPhone factory reset some day in the future?

Four months ago I lost all my data after an iTunes update automatically restored my phone to factory defaults. I lost all the pictures of my newborn. I understand that when you do a factory reset the ...
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1 vote
0 answers
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CyberChef Challenge #21 [closed]

The challenge data is: ...
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0 votes
1 answer
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decrypt the code in portuguese [closed]

A friend of mine sent me this encrypted message and I have no idea how to decrypt it! And btw, to make things worse, the message is in portuguese, not english!! Here: ...
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