Questions tagged [decryption]
The process of decoding data that has been encrypted into a secret format.
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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 would like to know if there is any way to recover the plain-text of a message that's been encrypted with 55 rounds of the Caesar cipher, with a different (independently chosen) key for each round; I ...
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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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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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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 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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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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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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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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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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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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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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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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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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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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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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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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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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Why does OpenSSL fail to decrypt when the key is too large?
I have the following groovy script:
cmd1 = "echo ${really_long_key}"
ssl_cmd = "openssl aes-256-cbc -md md5 -nosalt -a -pass pass:${encryptPassword} dec"
def process = cmd1.execute() | ssl_cmd....
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Android leaking app analysis
In my thesis I'm trying to analyze leaking private data on Android apps. I noticed that the vast majority of data is encrypted.
How can I analyze this data without decrypting it?
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encrypting file and user have public key to decrypt in barcode [closed]
I want code very secure system and I need some answers and help.
Is this secure if encrypting file and it is possible decrypt with barcode/QRCode where is decryption key to view it.
I've thinking of ...
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Intentionally slow decryption
We need to store the user ID of authors of messages in a database.
It should be possible to find an author of a problematic message i.e. on police request in minutes, but it should be very hard to ...
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Microsoft Bitlocker Decryption interrupted. Cannot decrypt again
I've locked on of my USB drive with BitLocker. When I was decrypting(removing BitLocker), my PC went off due to power cut in the halfway of decryption. Now, when I'm trying again to decrypt using ...
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Cross platform OpenSSL aes encryption
I encrypted a file by using the following command from a stackoverflow answer:
openssl enc -in file_name -aes-256-cbc -pass stdin -out file_name.aes;
I can decrypt this file by running:
openssl enc ...
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How to crack encrypted Android SQLite DB? [closed]
I am testing an android app which has DB encrypted (AES-256), I extracted it from system files /data/data//databases, I have following doubts,
How do we ensure that DB is encrypted properly and it is ...
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1
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Decrypting AES-128-CBC leads to first block being correct, the rest corrupt
I'm currently investigating a piece of software which encrypts it's files with AES-128-CBC.
From disassembly it is truly known that the algorithm used is correct (log messages plus calls to the ...
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4
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Losing the Initialization Vector in Cipher Block Chaining
I have written a message and encrypted it using cipher block chaining.
What will happen if the receiver loses the Initialization Vector, or doesn't receive at all?
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I need to compute a string whose SHA256 hash matches a given prefix. How should I approach it? [duplicate]
Is there any (more efficient) way for computing any string with a given prefix in it's SHA 256 hash? And how probable am I to stumble on such a string if I brute force?
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