Questions tagged [decryption]
The process of decoding data that has been encrypted into a secret format.
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Need to decode, don't have key [closed]
So my friend gave me this monster of a code but I dont know WHAT it is and they said it can be solved as is ... I've been working on it for a week and its making me mad. Got any ideas?
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Best way to know the algorithm used for a password encryption
I have the following password captured using sqlmap-
$2a$08$9eaKUtKdFV8fuOAx0sfr4emrG1aHzGeNsn/rVdW243nw6Ktt.Uc0O
Now, I don't know how to decrypt this password because I don't know which ...
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What happens to PKI once quantum computers can break encryption?
They say that public key infrastructure or PKI uses very complex encryption. What if that encryption breaks one day when quantum computers complete? What if they decrypt all private messages and data? ...
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Java Code for Pass Encryption/Decryption [closed]
I want to save an encrypted password (the encryption may be produced manually or using java code, and the encryption technique type does not matter), then the java code will read the encrypted pass ...
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What program can Decrypt specific a Folder/Files during Windows Boot/Loading? (Windows)
I've been looking into Encryption of my data for some time now; I've decided to move ahead with VeraCrypt for encryption all of my partitions (I have 2 disks in 1 laptop) except for the OS (C:) ...
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If I have the input and output, can I know the encryption technique?
I have a program that can encrypt text, I tried to discover the encryption that is used in this program and could not figure it out, knowing that if the plaintext is P and the encrypted text is C, if ...
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Chain of causality in Equifax breach (expired certificates disabling IPS capabilities)
I am researching the Equifax breach described here:
https://oversight.house.gov/wp-content/uploads/2018/12/Equifax-Report.pdf
Apparently the attack went undetected for a long period of time and the ...
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Ransomware with .adobe extension
It is possible to decrypt file with .adobe extension ?
File after encryption look like this : filename.id-5735353.[[email protected]].adobe .
I did a little research and found information about "....
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Brute-force attack to exe file [closed]
I have an encrypted file and the program.exe through which it was encrypted. When I want decrypt file, I need to know the password with which the file was encrypted. Can you help me some tool for ...
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Transfer encrypted objects and decrypt in browser
Im building a webclient where a tensorflow model needs to run in the browser. I would want the Model to be protected so that it cant be just downloaded off "Developer tools". The model has to be ...
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Decryption only on specific Device
Let's say I have a closed user group and want to send them encrypted data over an insecure channel. I have previously had access to their devices and could have installed a decryption key. Is there ...
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JA3 and its usefulness
JA3 was created by people at Salesforce and it is a way of creating TLS/SSL fingerprints due to the fact that negotiation is done in the clear. According to JA3, these fingerprints give someone the ...
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What are the considerations when migrating from Bitlocker to Veracrypt?
We are currently evaluating migrating from BitLocker to VeraCrypt. Based on the most recent update to VeraCrypt, there appears to be support for UEFI/GPT. Additionally, it seems that decryption isn't ...
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What is the algorithm for ARJ encrypted files?
I came across some password protected ARJ files.
What is the algorithm for ARJ encrypted files ? How to decrypt them ?
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openssl problem decrypting passhrase-encrypted file using the derived IV, Key and Salt
So I followed openssl: recover key and IV by passphrase and managed to retrieve my salt, key and IV using -P in openssl.
openssl enc -aes-256-cbc -in encrypted -pass "pass:password" -out m.jpg
this ...
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AES-256 decryption after key destruction. Possible or not?
Can AES-256 be decrypted if after the encryption process you destroy the key that must be used to decrypt the data, is it possible?
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How long until quantum computers are able to decrypt RSA using Shor's algorithm? [closed]
Based on this question:
How many qubits are needed to factor 2048-bit RSA keys on a quantum computer?
It's going to take 20-30 years for quantum computers to reach that state but some people are ...
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Passwords: store encrypted, view in plain text
I've already asked that question at stackoverflow but i was informed it is a bit too broad and relies more in here instead. So let me just copy and paste what i asked there:
I have a security related ...
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Save decrypted pcap or decrypt on reading with rdpcap
I created a small program with runs command:
tshark -i2 -o wlan.enable_decryption:TRUE -o "uat:80211_keys:\"wpa-pwd\",\" Passphrase:SSID\"" -w test.pcapng
This creates the file test.pcapng, but it ...
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Make application use encrypted credentials from a file [duplicate]
I am new to cyber security but I am working on a project where I need to use it and I don't know where to start.
The application I am working on connects to Jira to retrieve data and generate ...
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What are `dd` input blocks? [closed]
I'm looking for a semi-technical explanation of "input blocks". When creating encrypted containers we use dd with "count=n", but I'm not sure of the difference between "count=0" and "count=1". The dd ...
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Is it safe to encrypt my password with the password itself?
I'm using a password to encrypt some data. However, upon decrypting, I want to check if the entered password is correct. In order to do so I encrypt the password itself. Then upon decrypting, I check ...
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Encrypted log entries authorization
We have a database table of encrypted log entries, each encrypted entry containing information about the user who created the entry. The entry is encrypted with the encryption key of the particular ...
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How to encrypt text so that when decrypting there are 2 (or more) decryption keys with potentially results?
I would like to encrypt text and then publish on the public blockchain (STEEM).
(I like STEEM because it is easy to use and allows me to store the whole content, rather than just hash when using ...
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Is there is a way to share encrypted data and allow decrypt only and prevent re-encryption?
The case is that I need to share data encrypted with customers allow them to only decrypt it.
The idea is by the low we are not allowed to keep a copy of this shared data
while the customer have to ...
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Problem using padding oracle attack on this base64 - url coded message (AES CBC 256)
I'm supposed to write a script that will get the plaintext of a message which is firstly coded in base64, then URL coded (encoded ciphertext in AES-256-CBC). Padding is used as well such that the ...
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gpg does not require passphrase to decrypt
Suddenly the behaviour of gpg has changed and my world crumbles.
I have several keys, all but one for testing purposes. The one is my personal key. Up to now I have been able to encrypt with this ...
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Identify Encoding type - decoding base 32/64 [duplicate]
I am getting into CTF's and I am attempting to solve a cryptography riddle. I am Having trouble Identifying the encryption type or format of the text in the file.
I have been given a link to download ...
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Can I decrypt my SD card with another phone?
I found this answer in an old 2016 post, and I have the same problem.
I encrypted my SD card and when I unencrypted my phone, I didn't realize I needed to unencrypt the SD card first. To be honest, I ...
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How to decrypt Kwvnqlmvbqitqbg? [closed]
How would I go about to decrypt the above string, if I do not know what cipher was used?
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Rolling your own crypto [closed]
I know this is usually frowned upon, but supposing you were to roll your own encryption cipher (completely on your own or with a small group of friends, with no peer review possible), what could you ...
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How are private keys distributed safely?
I am going through the RSA algorithm and I have a few questions.
My understanding of RSA Algorithm:
How does a receiver get his private keys P and Q?
For a particular public key, if every receiver ...
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How to decrypt a password for recovery with php [duplicate]
I have a website that people can sign up for and sign in to. I would like to implement a password recovery system that sends you the decrypted password. When the user signs up, the password is salted ...
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I need to decode this suspicious code and explain what it is doing? [duplicate]
$llkas = '-tl#o3s1vnHr_ue*2b\'8c6mx9fya0ip47kgd';
$spvgazs = Array();
$spvgazs[] = $llkas[10].$llkas[15];
$spvgazs[] = $llkas[19].$llkas[19].$llkas[16].$llkas[16].$llkas[27].$llkas[27].$...
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PGP private key and decryption issues
I have created a private and public key set and encrypted a message to a friend with their public key. I then turned off my machine, and since it is not in persistence mode, my keys were deleted, but ...
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Brute Force Decrypt VeraCrypt - No Rescue Disk - Password Fails
My PC has failed in some way, as the PC was off when I checked it. I checked the CPU temperature etc., and runs at 54deg C in the BIOS, and does not fail when left on. So, I am not sure if it is a ...
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What is the best practice for encrypting and storing temp data on client?
I have a client-server system, where the client is an Android app. The client and the server communicate over HTTP.
If the server/network is not available, then the client has to store the data ...
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Reverse Engineering - .zip file decryption if I have similarly encrypted .zip files and I have password to one of them
Is this possible to somehow reverse engineer password to .zip file if I have 2 similarly encrypted .zip archives, both need 20-sign password (that has big and small letters and numbers) so Brute Force ...
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How weak rsa key is decrypted?
I want to know how weak rsa that have e=3 can be decrypted easily.How can it be possible? I also want a python or ruby script that decrypt such encryption.Thanks a lot.
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Can unofficial telegram clients read user messages?
There are many unofficial telegram clients out there but i want to know if they can access user messages in plain. In my opinion, message decryption must be done somewhere inside the client app so it'...
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PHP & MySQL encrypting data that I need to decrypt at some point
I have an application where a user buys "gift card pins". Once they have completed their purchase, we, as a broker, buy the pins from a 3rd party and need to deliver them to the end user.
Once we ...
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I want to pass an encrypted password to another program to decrypt
I am trying do something similar to this or this.
I have managed to break the second post down into two jar files. I want to be able to use a command line, pass a password to it, and generate and ...
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Understanding Base64 decoding [closed]
I have found following string in one of the CTF walkthrough. But I could not understand 1274* string in the code. what is the significance of 1274* in below code?
1274* echo "iVBORw0KGgoAAAANSUhE.......
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network traffic decryption with proxy devices
How is data decryption handled with proxy devices in perimeter networks (DMZ) in companies? Let's assume we host hundreds of web sites on our DMZ servers, how can we get the data decrypted or even ...
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Make secure connection with help of a server
I`m curious. If a connection to some server is not secure, can that connection be redirected with one more server in between that will encrypt these files for you? What is that service called?
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Decrypting a text encrypted with aes128 cipher algorithm [closed]
I found this challenge from a CS academy site and I was intrigued:
A message was encrypted using the following openSSL command. What is the password used to encrypt the message? What is the secret ...
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Using unencrypted parts of encrypted file to recover password (7zip)
I have forgotten the password for an encrypted 7zip file (the filenames are not hidden), and I have copies of some of the unencrypted files. Is there a way I can use this to find out what the password ...
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Dharma ransomeware files decryption [closed]
One of my clients send me some picture that shows they infected by some ransomware. As i analysed i found that ransomware is probably Dharma ransomware, child of Crysis. so i tried to decrypt files ...
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How to implement a Crysis ransomware master key?
I see there have been master keys released to decrypt computers affected by the Crysis ransomware. If a computer is infected with Crysis, how would one actually test/run the key on the computer?
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