Collaborate Disseminate
Consider the following use case:
User can choose a key.
The key is used to encrypt files to be stored on a server.
Some file and directory names are easily guessed from the nature of the software, some are not and those shall be encrypted… Continue reading Encryption to use when limited data for a chosen plaintext attack is available
I’m working on a cryptanalysis project for my professor, and I need some guidance. The assignment involves implementing one of the following types of attacks on a ciphertext encrypted with a symmetric key algorithm:
Chosen plaintext
Chose… Continue reading Help Needed with Chosen Plaintext Attack on AES-CTR
I was studying about the Microsoft exchange server data breach attack of 2021 as part of assignment case study. One of the tasks of the assignment it to find its relevance with IND-CPA, IND-CCA1, IND-CCA2 standards.
From my understanding t… Continue reading Microsoft exchange server data breach relevance to IND-CPA, IND-CCA1, IND-CCA2
I have a several tuples of raw and encrypted text from a blackbox service.
What would be the most reasonable approach to guess/bruteforce the encryption algorithm and parameters (IV, key) that are being used to produce encrypted text?
and … Continue reading Guess encryption algo and parameters from pair of raw/encrypted text
If the encrypted file is from one of the known formats, such as doc, jpg, mp3, etc., is it possible to reverse engineer it and decrypt it?
I "roughly" know the mechanic behind the AES encryption: Matrix operation, Row shifting, C… Continue reading Is possible to reverse engineer a AES encryption of a known file format?
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Continue reading I want to decrypt a text, but I dont have the key, is there a solution? [closed]
Long story short: I was using AES CBC PKCS5 on my image server, but I lost my keys (one key per image).
I know the first 61 bytes (the original and the encrypted) of each image plus I know the IV, and the key length is 256.
My question is … Continue reading Can I get AES CBC key from known plaintext, ciphertext, iv?
First off, I know very little about cryptography, as I am sure my post below makes clear. The short version is I presume I need to use the -o (offset) function of pkcrack, but I’m not sure how to work out what offset I need.
I have an old … Continue reading Partial plaintext with pkcrack
I want to encrypt a JSON file while exposing its interface (the name of the object fields) in clear text.
Since this exposes part of the content of the file, my guess is that an attacker could use this to hack the encryption key.
Are there… Continue reading Safety of encryption when knowing part of the content [migrated]
This is a form of the Kerberos protocol
I have two questions. Why does this protocol give the opportunity of a known plain-text attack because of no authentication of Joe? And how would an attacker perform a known plain-text… Continue reading Known plain-text attack on Kerberos