Cryptography Questions

I'm working on my master's thesis (computer science) on code which is written for post-quantum-secure signatures. the whole thing can be found

I've been trying to crack this for a while with no success. the server-side decryption uses rsacryptoserviceprovider rsa-oaep. i can't

I am new to tpm. i want to generate random bytes using tpm via esapi(esys) interface. i am trying to initialise esys_initialize().

The .net system.security.cryptography namespace has a rather bewildering collection of algorithms that i could use for encryption of

Are the rounds of key already set in cbc mode(aes-128:10 rounds,aes-192:12 rounds,aes-256:14 rounds) or is there other way to set the rounds of

There's an msdn article here, but i'm not getting

Is bouncy castle api thread safe ? especially,

I'm creating the keys pair with crypto in nodejs. var {

I'm trying to replicate this code in powershell: const hmac = cryptojs.hmacsha256(cryptojs.enc.hex.parse(hash), salt); seed =

My goal is to generate a keypair using generatekeypair from codec.crypto.rsa. this function requires a generator

Is it possible to recover certificate thumbprint (sha1 fingerprint) only from private key that will match original certificate thumbprint?

I want to create password hashes when creating users and store them to my database. my database password column stores hashes of 64 chars

For some reason i can't rely on ssl encryption. and i don't want to use any third-party libraries. so i tried to use native browser's

If you're trying to decrypt a string using nodejs, you will get this error if you're not using the proper input encoding and output encoding.

I am using rsa with private/public key. i am trying to encrypt a string, save it in a database (sqlite) and then retrieve it again and encrypt.

I have the following problem: after recreating the public key from a signed transaction, i try to encrypt some payload with it. however

New to node.js and i got error using sign() in crypto.please help! i created sign using const sign =

I am using paramiko. any idea how i can use the paramiko.rsakey.from_private_key() function? i'm interested in using a function to

I am trying to encrypt/decrypt hex data using node js module 'crypto' with des-ecb algorithm.

I need to decrypt base64 string using base64 key with ecb mode and iso10126 padding using des. in theory it is simple:

I saw both of the codes below on some websites. one used buffer to wrap crypto.randombytes() object for cipher key and

We are having an android app which a decrypting and encrypting large (up to 100mb) files over http-streams. therefore, we are using

I have some difficulties reproducing aes encryption and decryption in python. context: a year ago, i created a small

I am working with an api that require me to encrypt data before sending it with custom parameters and i am unable to get a good response from the

This is a question that does have a lot of overlap with what might be posted on cryptography stack exchange,but it's mostly rust-specific, and

I'm trying to base64 encode some rsa encrypted data, but the rsa encryption returns a tuple and the base64 encoding requires a bytes-like

Having lost the plaintext secret, but having the hashed key, it's posible to encript and decript in openssl like so (keys and iv are not the

I am creating public and private rsa keys and saving them to separate files using the code below. the file are successfully created without any

I'm developing a nodejs application and trying to integrate blockchain in it. here in my application, i want to create a blockchain where only the

I need an approach to generate a cryptographically secure and unique token in order to use in an online ticket sale service. what

I am trying to implement aes/gcm/nopadding encryption in flutter. i have successfully implemented it in java but when i tried to decrypt it in

When i try to encrypt or decrypt a token, i have this error : internal/crypto/cipher.js:92 this[khandle].initiv(cipher,

I need to generate such public key and do the additional signing of the bytes (which will include this generated previously key) i need to

I am writing a script to encrypt and decrypt an image in python3 using pil. here i am converting the image into a numpy array and then multiplying

I'm sorry if this question has been asked before but i cannot find any solution that helps me. basically, i have a huge number

I am trying to use the elliptic js library to generate a shared

I keep getting the following deprecation warnings when doing simple ssh connections:

I want to convert below php script to dart i tried a lot case but nothing help me. i have tried following code; but throw an exception here

I want to hash a can message received from a vehicle. the following code written in python is used to receive the can

I also posted this thread on unity's forum, but as it's more server/crypto oriented i'll ask here aswell. as mentionned in the title, i'm

I'm using the highly popular jsonwebtoken package

I am trying to use node crypto module in angular 7 for asymmetric encryption. and used below command to import the crypto module

Here is part of my code that uses crypto and works fine with node

I'm building a node.js acmev2 client and trying to rely only on a single cryptography library to keep the code simple. the native node crypto

I know that key sizes in ecdh depend on size of elliptic curve. if it is a 256-bit curve (secp256k1), keys will be:

Hello fellow programmers, currently i am trying to install

I have some blob data for example: const buffer = buffer.from('acdff12ba','hex'); how i can generate keys in

Om my application i receive the diffie

I have node js server for my android app and i want the communication to be secured using dh key exchange. i am able to generate the prime

I am trying to use the

I was trying to find a compare or verify function for node's built-in crypto module, specifically for scrypt, as most password-hashing modules i

I am trying to decrypt a voice file after encrypting it, uploading it to firebase then downloading it. and for the encryption/decryption i am

I've been having this issue for a while now. i'm trying to add a sign in through steam button, which upon login, not only retrieves the user's id,

Moodle saves hashed passwords in the user table in this the format: if the stored password is:

I have been given a public key by my client, and i want to send him a text message which would be encrypted with his public key. the public key is

Im able to decrypt the message running the script, but not when i use the user input method to get the encrypted message. i have this

Is this a valid way to generate n random bytes that are cryptographically random? def

So i stumbled upon this thread on here with this script and it returns a negative d value and my p and q values are both prime. any reason for

I've been using: https://github.com/cobowallet/tron-wallet

I am trying to write a script which equivalent to php opensssl decryption, this is what i have tried, var crypto =

I've been working on a digital signature node.js app then i faced strange behaviour which i couldn't figure out. first i generated

We have a legacy php system that encrypted some data via openssl_encrypt. the php code is pretty straight forward. (all values are randomly

I'm trying to make connection between server and client. i create ecdh keys with elliptic.js and try to cipher-decipher messages. secret keys are

How can i reach a shared secret using diffie hellman key exchange with existing base64 rsa 2048 bit not pem encoded key pairs in javascript? i get

I wanted to generate a 32 bytes aes secret key with the code below. i am using the node module pkcs11js as i need to connect to hsm. however, when

The documentation of

I have to translate this python code to nodejs: from passlib.hash import pbkdf2_sha256 pbkdf2_sha256.verify('12345678',

I'm trying to make a simple app using flutter, cryptocurrency price tracker. using

I've generated a private and public key pair in node using node-rsa and can successfully sign and verify using those keys in node. what

I've spent several hours trying to get the correct response from the endpoint. for that purpose i need to send a signature string generated by a

I'm having some trouble with using a public key from java to encrypt within nodejs. i've created an rsa key within keytool

I have a problem when i want to install matplotlib via pip: i did: $ sudo pip install matplotlib

I'm trying to generate a hash as described at twitter's developer page:

Am learning to do the hash of a file in c using openssl but i always get the same hash. i have tried different files and content but the hash do

On the bitcoin wiki i found that bitcoin uses the ecdsa algorithm with the secp256k1 curve. relevant links:

I'd like to encrypt a string in php and then decrypt it in c. i'm stuck on the decryption part. (php) i first encrypt the string:

Here is the function i use to encode a string: #include <openssl/evp.h> #include <openssl/hmac.h> unsigned char

I am trying to do an ecdh between embedded device running mbedtls and java using bouncycastle. when i compare the produced key lengths i get a 66

I generate my ec private key as random number and my ec public key as the multiplication of the generator for the random number. now i

I have been searching around for a pure js implementation of aes 128 or 256 gcm but haven't found anything on github. if none exist, perhaps there

I want to use crypto api and i found linux kernel documentation about it.

I don't understand where the extra bits are coming from in this article

I am experimenting with zk-snarks and wanted to know if there was any library i can use in javascript. so far i have found out

I just made a simple program in c that takes a 4-digit code and encrypts every digit (previously decomposed, that goes from 0 to 9) using this

I am trying to make a base58 decoder in c following this tutorial

So i have been working on my coursework and i am trying to encrypt a password. however, the code runs as soon as i start to initialise the program

I'm trying to turn a string of a jwt token signature into a uint8array.

I am trying to use the library secrets on python 3.5 on ubuntu 16.04. it does not come with the python installation and i am not

I generated a base64-encoded key using this code in nodejs v8.11.0: const secret = 'shezhuansauce'; const key =

I want to get the same result with python. function generatesignature(basestring, privatekey, clientsecret) { var signwith = {

I'm currently trying to convert the decryption code using cryptojs into the method using crypto module in node.js. i guess there are some

I'm trying to get encrypted response from server using rsa public key. cipher is generated on server side but decoding on client side fails. web

I'm looking for a way to decrypt a file since a few weeks. but it's impossible to recover the file intact in php, only with node. but i would like

I've been looking at subltecrypto to encrypt/decrypt text messages, and wanted to extract the key that is used to string, but using the same

I need to generate a keypair in my flutter app, but it seems that there aren't any libraries to do so. there is one library called

I'm trying to generate a nano private key, public key and address (that's a cryptocurrency) in php. i successfully generated private keys but i'm

I'm wondering if it's possible to recover a rsa public key that i have converted to byte array previously. byte[] keybytes =

I want to code a custom key generator in python. this key will be used as an input (along with the plain text) to aes algorithm for encryption (i

Trying to decrypt the below value which is already encrypted using rsa privatekey i'm using same key pair publickey to

Each year at thanksgiving, my family has drawn names out of a hat to determine who they'll be a "secret santa" for the christmas gift exchange.