Questions tagged [decryption]

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

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Breaking Wifi password knowing its length of 8 [A-Z] alpha (upper-case) characters using Hashcat

I got the WPA handshake, now it's turn to crack the password using Hashcat. First, I wanted to make a wordlist of passwords [A-Z] the length of 8, but Crunch (the tool in Kali Linux) said it will take ...
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SMIME email decryption using a private key - what am I doing wrong?

I have an encrypted .eml file and a private key. I've looked it up a lot on the internet but couldn't find a way to decrypt the email using OpenSSL. I've tried this command: smime -decrypt -in ...
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how do i find the number of possible keys / password to decrypt a plain text

i like to know if there is any way to decrypt a plain-text that is encrypted 55 rounds using Caesar ciphers with different key for each round. and using brute force attack without knowing the length ...
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How secure is /dev/stdin in UNIX systems?

Is decrypting secrets with ccrypt and piping the result via stdin to openvpn secure? I've written the following alias to start an openvpn client more easily than before: sudo bash -c 'cd ...
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What if an attacker gets access to public key through an insecure media in digital signature?

If A encrpyts the message and creates signature using his private key and sends through the network then only B with the public key of A can decrypt that message. But what if the attacker gets access ...
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security of AES where attacker can ask secure code to decrypt arbitrary cypher-text

A service or library provides a function decrypt( user_id, cypher_text) and gives back plain text. Internally to the function it loads an AES key from a secure vault, decrypts the cypher_text, and ...
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What type of encryption/encoding is this? (Linux) [duplicate]

I've been struggling with encrypting this hash for a school homework. (Backstory) I had to gain access from my Kali Linux machine to an "unknown" Linux machine and I've done it, but now I have to ...
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1answer
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Encryption and decryption in the browser on the client's side – is it safe?

There is a possibility to download the file with one’s PII from the dedicated web server. The file might be decrypted by filling the two factors. These two factors are delivered via email and SMS. The ...
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Decrypt a text I don't know how was encrypted [duplicate]

I have these 2 different encrypted texts +j+hnQx9Wl83MWeM92tyZA== and E4NEi092gWbppbpNR0JUAw== They should both be long numbers, like 19732832, but I don't know how to decrypt them. Does ...
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80 views

How to decrypt Diffie-Hellman in wireshark?

How can i decrypt Diffie-hellman TCP packets? I'm trying to make a tool that shows cleartext response from a server that uses this encryption. However when i look online people all seem to say it's ...
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Authentication Message in TLS

I was reading RFC8446-TLS13 and a tls visualization and could not grasp some concepts. I have all the tls connection data (client hello etc.) and SSL Logs (server_traffic_handshake_secret) I see that ...
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How to decrypt XML encrypted as per FATCA IDES standard?

My former colleagues have encrypted an XML file as per FATCA-IDES standard: Digitally signed the XML payload (using "enveloping" signature and create SHA2-256 hash) RSA digital signature using the ...
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How to determine the type [duplicate]

Today I discover a encryption method Which 0 = 35 1 = 34 2 = 37 3 = 36 4 = 31 5 = 30 6 = 33 7 = 32 8 = 3d 9 = 3c It's the encode of number 1 to 0 for the method Can you please help me to ...
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Is there such a cryptographic algorithm?

Is there such a cryptographic algorithm that will encrypt any file with a password. But when decrypting, if the password is incorrect, the file will be decrypted, but instead of relevant data there ...
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How does PGP Public and Private Keys work?

I recently tried to understand how PGP works: I encrypt plaintext with my private key and if I send that encrypted text to others with my public key they can encrypt that with my public key?
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Known plaintext and encrypted text, what method or cipher is being used? [duplicate]

I have the plaintext and the encrypted(?) output. Maybe you guys know which method is used for this encrytion. I was thinking about Base64 because of the "=" termination, but i'm not sure because of ...
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What is the encryption used here? [duplicate]

This is the string: UVRWUVRsUXRNRGRSUlZBdE9FTllUbGM9 I want to decode it, but I'm not sure what decoder to use. Thanks :)
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Finding encryption algorithm from known and encrypted password strings [duplicate]

I am working with a piece of software which seems to use some type of lightweight, "home baked" password encryption algorithm. I know a number of clear text passwords as well as their corresponding ...
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188 views

How to find just the first character or value of a MD5 hash string

I want to know how to find just the first character or digit in first part of a 64 length string from a MD5 hash. For example, we have a hash: ...
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Decrypt DTLS traffic when using the Cisco AnyConnect Client

I am using the Cisco AnyConnect Client 4.7 to connect to a VPN. I need to decrypt the traffic to examine the packets and understand how VPN works. I have read about providing the PSK to Wireshark, but ...
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Disable Encrypted Protocols Through Firewall

In my company, we have two internal domains with a firewall between them. When requesting firewall rules for an application with components on domain A and domain B, I was told that encrypted ...
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How to determine what cipher I encrypted a file with?

Years ago I had a bunch of bitcoin in a wallet that I encrypted. This was back when bitcoin was like $0.20 or $0.30 each. At one point I couple hundred of them but didn't know what to do with them. I ...
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Anyone know what method of encryption was used for this text and what tool to use to decode it? [duplicate]

The text is jA0EBwMC9X3xh+z164u30k8BmODUUiKZhYIBiqDoukxwe02XNiDEP0GVSDMLTNo5 EE4lWYV/NKcniek8RvtCS2JKR/i00gwUts1zeAK3p4SkbUFxM0tDqQ00AReIrXBe =0loc
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Required a simple guide for secure messaging application

For my personal research, I have to create a messaging app, but security is only important part of application, security from MITM (man in the middle attack), at device end, and at server level. (note:...
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Need some help with decryption

I've used x64dbg to work out decryption in a particular program. I've found where it changes the encrypted material into readable text but can't work out the best way to use this information to ...
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How is data Encrypted and Decrypted from a database with PHP Sodium

I'm a PHP web developer who has been trying to learn and understand how to encrypt and secure the data stored on a database with PHP Sodium. In terms of security knowledge I am very new to the area ...
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1answer
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Authentication followed by storage decryption on login?

I got a typical login setup: Username/password that is passed to server, hashed/salted with PBKDF2, then compared to hashed/salted entry in login database. After that, JWT token is generated and ...
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Cracking a ZIP-File password [duplicate]

This might be a stupid question, but I do not have a lot of knowledge about this kind of profession. I have a password-protected .zip file, and I want to know how to crack it. I have tried "zip2john" ...
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Cracking zip password [duplicate]

I am trying to decode a zip file password decoded form of: %3C%7C%3D3r%28Strong%29 I have tried to convert in to MD5 hash and use john the ripper to crack the password. Can someone explain how to do ...
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How to decrypt Chrome saved password from “Login Data” file

Is there a way to decrypt passwords from Chrome Login Data file? My goal is learning about the backend process of this decryption, so I don't want to use any pre-built applications.
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How TLS symmetric encryption works?

After the secret symmetric key is exchanged, how does it look like? What length (in a production use) is it and what can influence it? How the key is used to encrypt / decrypt a piece of data? I ...
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1answer
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WEP QOS_DATA vs DATA decryption - difference?

I recently played a bit with my hardware pocket size IV WEP sniffer. It's a 5v tool that i use in my lab when bored: https://www.youtube.com/watch?v=jJyRaWrnbJg In my tests i figured out one of my ...
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235 views

Purpose of Decrypting & Scanning HTTPS traffic

Navigating to the below URL link from the Mozilla Firefox and entering some website link and clicking on View, displays certificate Viewer chrome://pippki/content/exceptionDialog.xul After enabling ...
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2answers
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what should be done to use sodium in a secure way?

Now, I've done some research by googling about the subject and reading the manual and read other topics about this at stackoverflow. But still I have a question about the security and secrecy behind ...
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What can a hacker do if I publish my email id and password but have 2FA on all of my accounts?

I have 2FA on ALL of my accounts. But my password was leaked in 7 breaches. Unfortunately I have used the same password for most of the accounts. Is it possible for him/her to bypass the 2FA?
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Common Encryption types with keys stored in Base64

I am a noob :) I am attempting to recover a password from a piece of software. The software has a XML file contains three fields that appear important to this process: Password Value, EncryptionKey ...
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I found this easter egg, any ideas what kind of encryption it is? [duplicate]

I am looking to have the cryptography identified of this encrypted message aHR0cHM6Ly9nb28uZ2wvZXY5SDN1 Any ideas what crypto was used here? Thank you
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Can I know the RSA encryption algorithm using the key-pair and encrypted data? [duplicate]

I generated ssl certificate and its key shared it to a third party. They claim that they use my ssl to encrypt data using RSA PKCS1. But I am not able to decrypt it using RSA:ENCRYPTION_PKCS1, I ...
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Decrypt file using Key and Initialization Vector in Linux

I am Salesforce developer but new to the Security World as well as Linux. We encrypted a file with Key and initialization Vector in Salesforce(only symmetric encryption is possible in Salesforce). No ...
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How to know what type of encryption/encode has used? [duplicate]

is there any way to find the type of encryption/encoding is being used? For example, i'm implementing gmail API application while fetching the storing credentials those are stored in encrypted mode ...
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GnuPG verify signature *after/while* decrypting does not fail when it should

I'm encrypting and signing data with the PHP function gnupg_encryptsign() (docs) which has the strange behaviour of signing first and encrypting afterwards. I'm aware of this thread saying this is ...
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Extracting openssl pre-master secret from apache2

I would like to be able to decrypt my server's https traffic for debugging and analysis. My server is a debian 9 Apache2 server running mod_wsgi and django. I have seen this post: Extract pre-master ...
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How come keys can stay secure through factorization of primes

Sooo I under n=pq where p and q are both large primes so it making factorizing them inefficient to the point of impossible but there must a a list of prime sets (heard people call them trap doors I ...
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1answer
305 views

Deciphering ciphertext with an unknown key and algorithm [closed]

How can I get started on understanding how to decipher this ciphertext when I don't know the algorithm or key used? TDcbY xqCa NeAA OsWMirK FNFOm bYRUYAkxl,  tqwl  axZU  XTaLrBSFv OI G vWjBZyqhz.  ...
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Decryption of TLS/SSL Traffic With the debug file of fiddler on wireshark

I wanna decrypt some packets on Wireshark, when I search the Internet, some people were said to use SSLKEYLOGFILE environment, I do the stuff, but it looks like that chorme doesn`t update that file ...
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How do I decrypt a .dmg image if I know details about the password?

I encrypted a folder and forgot to save the password. I remember how long I made the password (40 characters) I know the last two characters (40) I don't know the first 38 characters but I do know ...
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How to decrypt wifi traffic in realtime and write it to file with Tshark?

I have Wireshark setup to decrypt and display packets in realtime. But I need to have them written to file in realtime also. Someone suggested Tshark, but I can only get it to write to file and not ...
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107 views

For encrypted chat app, how can I store sent messages so that they are encrypted but still can be viewed by the sender?

Actual implimentaton will be in android but this is more about general security than actual implimentaton details. I'm making an end-to-end encrypted chat app and I know that in order to send ...
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1answer
511 views

How to decrypt Diffie-Hellman encryption in WebRTC?

I have installed a WebRTC server application, which is designed for Contact Center solutions: communicates with internal PCs in pure RTP (agents), and with external PCs (customers) using encrypted ...
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How did Google “decode” my Gsuite password? [closed]

Google has recently admitted they were storing "G Suite" users' passwords un-hashed on their systems. But if a hashed password was transmitted to Google when I logged in to my account then how did ...

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