Secret vs. Non-secret Initialization Vector

Today I was doing some leisurely reading and stumbled upon Section 5.8 (on page 45) of Recommendation for Pair-Wise Key Establishment Schemes Using Discrete Logarithm Cryptography (Revised) (NIST...

Trying to use ESAPI getValidInput but getting error

The following error is being generated while trying to validate an input: org.owasp.esapi.errors.ConfigurationException: java.lang.reflect.InvocationTargetException SecurityConfiguration class...

Ergonomics issues with fixed size byte arrays in Rust

Rust sadly cannot produce a fixed size array [u8; 16] with a fixed size slicing operator s[0..16]. It'll throw errors like "expected array of 16 elements, found slice". I've some KDFs that output...

Hot to use mechanisms CKM_ECDH1_DERIVE with pkcs11interop

I bought a NitroKey HSM and wanted to derive a secret with EC. Previosly question For this, I want to use the CKM_ECDH1_DERIVE mechanisms. Which is supported by this HSM, see: Referring to the...

awk to match pattern from a file to another file

To find a string in a file and print first column of the output, we can use grep "foo" file.txt | awk '{print $1}' which can be done using awk alone awk '/foo/ {print $1}' file.txt...

Issues during implementation of custom ETH settler

I have investigated and played with corda-settler project. Following the recommendations within the documentation, I have created a custom ethereum module (with an outline similar to the ripple...

Python pandas column to replace string boolean values to actual boolean type

I want to replace string boolean type present inside a column with actual boolean values. kdf = pd.DataFrame(data={'col1' : [True, 'True', np.nan], 'dt': [datetime.now(), ' 2018-12-12',...

Koalas applymap moving all data to a single partition

I need to do element-wise operation on a Koalas DataFrame. I use for that the Koalas applymap method. On the execution Koalas moves all data to one partition and then applies the operation. The...

Implement PBEWITHHMACSHA512ANDAES_256 of java jasypt in python

I am trying to encrypt a password in python and decrypt it in java springboot application using the jasypt library through jasypt plugin. What i have done so far For simplicity i have used a zero...

urlsafe_b64decode: return binascii.a2b_base64(s)

I'm working on python cryptography by following tutorial. here is the code: import os import base64 from cryptography.hazmat.backends import default_backend from cryptography.hazmat.primitives...

java bouncy-castle KeyAgreement.getInstance works in eclipse but throws Exception: JCE cannot authenticate the provider BC when jared

hey so I've been trying to translate some spring code to vertx and I have got this piece of code that uses bouncy castle private SecretKey calculateSecureSymetricKey(Key privateKey, Key...

ECIES: correct way ECDH-input for KDF? Security effect?

In order to understand ECIES completely and use my favorite library I implemented some parts of ECIES myself. Doing this and comparing the results led to one point which is not really clear for...

Problems installing Pip Cryptography in Windows

I am trying to install cryptography, but I am seeing a bunch of problems. For some reasons there seems to be some dependency to my Visual Studio application and it tries to initiate some build...

how to convert pandas dataframe to koalas with mixed data types

I m using Azure Databricks to convert a pandas Dataframe into a koalas data frame... kdf = ks.DataFrame(pdf) This results in an error message of "an integer is required (got type str)" I tried...

Fernet encryption/decryption with python and kotlin

I have a project written in python. I use cryptography library to encrypt and decrypt data. I do it how is shown in their tutorial. Here is my python code: import base64 import os from...

Apple eciesEncryptionCofactorVariableIVX963SHA256AESGCM vs BouncyCastle ECCDHwithSHA256KDF

I'm trying to encrypt communication between Java (BouncyCastle) and iOS using the Apple algorithm eciesEncryptionCofactorVariableIVX963SHA256AESGCM. The algorithm by Apple is not well documented,...

Is this AES GCM file encryption good practice?

I'm using this to encrypt a file, and then to decrypt a file, using AES-GCM: (do pip install pycryptodome first if not installed yet) import Crypto.Random, Crypto.Protocol.KDF,...

How to convert exported Cosmos SDK private key to format that can be imported by Keplr or Metamask?

Keplr just added the feature to import an account using a private key (which is awesome!). This was primarily requested because a number of lunie users lost their mnemonic phrases but maintained...

Migration of users from asp.net identity 2 to firebase authentication

I have a .net application which uses asp.net identity 2 in order to authenticate users. The users login using username/password and upon successful login an access token (JWT) and a refresh token...

How to calculate an average stock price depending on periods

I am trying to calculate the average opening price for a stock, depending on different periods (week, month, year). Here you can see a part of my df : My dataframe (987 rows for the complete...

The library libcrypto could not be found

Recently my lambda code stopped working. I am no longer able to create connection to Snowflake with sqlalchemy. See error stack below. The library libcrypto could not be found:...

ECDH with HKDF using c#

What is the best way to implement a elliptic curve diffie hellman using HKDF as key derivation function in windows using native windows functionallity. I couldn't get ECDiffieHellmanCng from...

koalas throws ' Can't get attribute _fill_function' on <module 'pyspark.cloudpickle' when doing simple head() call

When I run the following code in a python script and run it with python directly I get the error below. When I start a pyspark session and then do the import of koalas, the creation of the data...

What are the dependencies for django-allauth python:3.8.3-alpine Dockerfile

I have a Dockerfile, docker-compose.yml, requirements.txt defined below for a django project. The Dockerfile uses python:3.8.3-alpine and the docker-compose.yml have a db service that uses...

Adding a new column to an existing Koalas Dataframe results in NaN's

I am trying to add a new column to my existing Koalas dataframe. But the values turn into NaN's as soon as the new column is added. I am not sure what's going on here, could anyone give me some...

Can't install keyrings.google-artifactregistry-auth, requires Rust?

I tried to install the https://pypi.org/project/keyrings.google-artifactregistry-auth/ package, but installation failed because it claims that Rust is required to install: This package requires...

Stuck at Could not build wheels for cryptography which use PEP 517 and cannot be installed directly

Upgraded pip command still having this message. I am trying to install django-allauth. The following error is generated while using pip install django-allauth (venv)...

Password hashing using CryptoKit

I'm using (CryptoKit) to use AES-GCM to encrypt some data and authenticate it as well. However, I was wondering how I would generate an AES-GCM key from a plain text password. Normally, you would...

Koalas / pyspark Failed to find data source: delta

When I try to write a Koalas DataFrame directly to a delta table using koalas.DataFrame.to_delta() locally I get the following Pyspark exception: java.lang.ClassNotFoundException: Failed to find...

Problem installing cryptography on Raspberry Pi

I'm trying to install the cryptography package within a Docker container on a Raspberry Pi. It has worked before, but, for some reason, stopped working, when I had to rebuild my container. When...