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AES 128-bit, 192-bit and 256-bit Algorithm Analysis

I want to know how many approximate calculations it takes to encrypt or decrypt AES using specific key size. Does it run in linear time or whatsoever based on its length of input characters. Is its ...
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2answers
55 views

How to encrypt file with RSA and AES that anyone with RSA key can decrypt them?

How to encrypt a file with RSA and AES-256 that anyone with RSA key can decrypt them?.
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1answer
76 views

Does password length affect AES encrypt/decrypt velocity?

I'm implementing crypto in Node, following this article: https://lollyrock.com/articles/nodejs-encryption/ It defines: ...
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0answers
36 views

Encrypt multiple files with OpenSSL securely [closed]

I wish to encrypt potentially gigabytes of data on my pc, and I wish to be able to decrypt and use those files. However, I am a noob, so bear with me. My idea is to use ...
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1answer
142 views

Differences between Webcrypto (js) and Cryptodome.Cipher.AES (python) [closed]

I'm trying to understand the difference in output of AES decrypt (GCM mode) using Webcrypto and Cryptodome.Cipher.AES in python. ...
3
votes
1answer
212 views

Why can't decrypt with OpenSSL if salt changed (for CBC and ECB)

A file encrypted with OpenSSL (with, for example, AES 256-bit mode CBC) using the Linux command openssl enc -aes-256-cbc -in texte -out encrypted_texte -k password ...
1
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1answer
223 views

Encryption / Decryption using AES-256 GCM

I am new in cryptography and I am facing some complications in encryption-decryption. I am trying to use AES-GCM with a 256-bit AES key and a 96-bit nonce. I use an open source project (Vault) to ...
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1answer
82 views

How much time does AES decryption take?

I am attempting to decrypt a 90 GB file that is encrypted using AES-256. I have the password. How long should this take to complete? I've had the process running for over 3 days with no progress.
2
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1answer
57 views

Is it possible to reverse Ansible vault data?

I would like to publish on github a full set of ansible playbooks. Some files contains sensitive data, so I have 'vaulted' them, encrypted. You can find the format description here and some relevant ...
0
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1answer
57 views

AES256 mix column code generating output bigger than 8 bits

I'm implementing AES256 in javascript with block size 128 bits and i understand every thing about AES except mixcolumn transformation. so i copied this code from the internet and both mixColumn and ...
0
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0answers
33 views

How effectively is hard to brute force an AES key? [duplicate]

I know that AES(Rijndael) algorithm uses a 128 to 256bits key. Using a brute-force attack how many tries are required to have mathematical assurance to find the exact key to decode the message(in case ...
0
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1answer
45 views

Which symmetric algorithm should I use for storing files in untrusted servers?

I have gigabites of files, which I have to backup. I have some servers for storing this files. But these servers are untrusted. So I need to encrypt files, then backup files. When my PC breaks down, ...
2
votes
2answers
83 views

AES Is it safe to expose the plaintext and cyphertext in the same place,

In a web application, I need to send in a webpage form an id (my plain text) and then retrieve it back when the user submit the form. But i need the id to be protected, so malicous users can't send an ...
1
vote
1answer
383 views

AES-256 password cracking time

My question is kinda simple. I want to use AES-256 encryption to encrypt my backup. Using a password like this: ...
1
vote
1answer
82 views

what method of transposition does AES 256 encryption use

I'm interested in learning how to use AES-256 encryption in C/C++. I'm still a beginner in Cryptography but I'm confident in my abilities to program. There is still a lot for me to learn about this ...
2
votes
1answer
106 views

Do aes_256_gcm IVs just need to be unique for that key?

I'm using GCM (via openssl's EVP_EncryptInit_ex(ctx, EVP_aes_256_gcm(), NULL, NULL, NULL))). The IV's default length is 12 bytes. It says that the IV must be ...