Questions tagged [cryptography]

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Encrypt MAC address and send over apache kafka infrastructure using python

I have a data extract from Cisco prime api which contains MAC address of access points among other things. I want to create a kafka-python producer that can encrypt the MAC address and send it over ...
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Key Exchange Algorithm Library in C

I am working on an embedded system with only 128KB of flash memory available and I am looking for a C library that will let me use an algorithm for key exchange. Basically the devices A and B don't ...
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Ruby library for secure password hashing

Following several resources on the web (e.g. here), I'd like to use the $6$rounds=500000$%.16s format for password hashing. One option is mkpasswd -m sha-512 -R 50000. However, I would prefer a Ruby ...
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Is there some libraries or implement of GSW13 homomorphic encryption?

I am doing research related to homomorphic encryption and need to implement the third generation homomorphic encryption proposed in GSW13Homomorphic Encryption from Learning with Errors: Conceptually-...
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Cryptographic Service Provider module signed with microsoft signature

I am looking for a software module csps which is signed with microsoft, ready for using. I mean this module can be used by calling another module, and it have microsoft signature, it can bypass ...
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ECDH online tool recommendation

Does anyone know some good online calculator or tool that can do a ECDH key agreement cross-check? I want to using the same test vector to do cross-check test with my code. I find this on-line tool ...
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Where can I find a working implementation of ctr-drbg for javascript?

I'm trying to use ctr-drbg (based on NIST 800-90A) for some work in nodejs, but the only drbg implementation that I could find is here, where you can see that ctr-drbg is proven to not work. From ...
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is there any good implementation to the RSA in arduino ? c language

I need a good implementation to the RSA algorithm that works on Arduino Mega with key size 1024. The code will run on Arduino IDE. The project idea simply is that an Android app sends an encrypted ...
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Realtime plotting a graph for time complexity of RSA algorithim using php

I want to plot a time complexity graph of RSA algorithm using PHP and MySQL.but I don't know how to plot it real-time using PHP. please help me finding opensorce code or tool or libraries to plot it ...
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1answer
87 views

C++ implementation of IEEE 1609.2 standard

I am looking for a C++ implementation of IEEE 1609.2 standard. This standard defines secure message formats and processing for use by Wireless Access in Vehicular Environments (WAVE) devices, ...
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Looking for C library to program a simple encryption/decryption task by non-cryptographer

I have been trying to implement a high-volume symmetric (AES256) encryption/decryption pipeline for files on disk. Originally, I tried to do this by having scripts call command-line tools such as ...
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1answer
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Open source libraries for asymmetric encryption for Android and iOS

I'm looking for open-source libraries for both Android and iOS (Swift) to help implement Asymmetric key encryption. I have the public Key and the library should help with AES-128 (data encryption) and ...
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On premise alternative for AWS QLDB

What is the best alternative for on premise solution with the same features as Quantum Ledger Database - AWS QLDB? transparent, immutable, and cryptographically verifiable transaction log owned by ...
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Burmester Desmedt calculations for cryptographic Key agreement in Electron Applications

I am developing a custom Xmppp Client in Electron in order to execute a Burmester Desmedt. I have looked upon the language offered options and this one and failed to offer the desired feature. Also ...
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23 views

Recommendation on libraries for Elliptic Curves

I would like to program my cryptographic scheme which uses some computations on elliptic curves. I coded it using sagemath package, which is a python library. It is simple but very slow. I need to ...
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DOS 6.22/Windows 98 encryption software

Is there any encryption software (full disc encryption or container mode) available for Windows 98? Same question for plain DOS 6.22. Maybe it's strange, but for some reasons I need software like that....
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Library for FFT interpolation from values at arbitrary points

I'm trying to implement a cryptographic scheme that leverages constant-sized polynomial commitments by Kate et al [1]. I'm looking for a library that can interpolate a polynomial fast via FFT in a ...
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Need Dynamic S Box Library in Java

I need a Java source code library that can dynamically generate the SBox (substitution box) for AES based on the AES256 key provided.
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What's the easiest secure way to encrypt a string with my own password on Linux?

I have a 12 word string that I want to encrypt securely and easily with my own long password in order to store the (preferably readable) result in writing in paper. I'm basically looking for a step ...
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203 views

RSA library for C supporting smaller key sizes

I was developing a crypto cracking challenge where the ultimate task is to factor a RSA key. To make the process feasible I want to use small key sizes (512 bits and lower). The challenge is a ...
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23 views

Elliptic Curve Family “KSS16” arithmetic implementation in C (on embedded devices)

could someone help me find a running implementation of those families? I did some search through google by the terms * KSS16 implementation in C * KSS16 benchmark on embedded( devices) * KSS16 ...
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69 views

Configurable Rijndael implementation for Linux?

I'm trying to recreate an (old) C# program in something that will run on Linux. So far I'm struggling to find an implementation that's configurable enough to make it happen. These are the ...
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Image Steganography tool which works on linux and mobile platforms

This is the first time I am trying steganography tools. I am looking for an image steganography tool which works on Linux and mobile platforms. The secret message can be embedded in the image on Linux,...
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2answers
143 views

Java implementation of Supersingular isogeny Diffie–Hellman key exchange (SIDH)

I am looking for a SIDH implementation for Java. Any license, it's for testing. Any recommendations?
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106 views

Tool for Cryptographic Message Syntax

I am looking for a software tool (preferably command line, open source and running on Linux) which is able to comprehensively handle the Cryptographic Message Syntax (CMS) standard (formerly known as ...
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1answer
62 views

Lightweight cross-platform cryptography-quality RNG

I am looking for a lightweight (< 500 SLOC) random generator that's suitable for cryptography. This needs to be C code that I can include in the SlipRock library (which I am developing). Currently ...
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307 views

Double Ratchet Algorithm (Axolotl) implementations

I'm looking for libraries that implement the Double Ratchet Algorithm (known also as Axolotl). So far I've found the following: https://github.com/wireapp/proteus https://whispersystems.org/docs/ ...
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Modular arithmetic with scala

Is there an already made Scala implementation for dealing with modular arithmetic? I could write it myself but as I'm doing some cryptography complex operations I would prefer to check that it is a ...
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50 views

OpenSSL alternative that features better automation properties

I plan on making my own Certificate Authority, and already got quite a bit of money for the project, and now I need a way to issue certificates. I was going to use OpenSSL, but it isn't great for ...
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Useful security key/crypto testing software

Would prefer open source. Open to commercial recommendations if you can explain why there is no other good option. Looking for software that can more or less black box test for strength and ...
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28 views

Software for hardware enforced data backup?

The Problem (may be skipped) I'm thinking about transitioning to an improved backup solution in the long-term compared to what I did until now (which is documented in my other question). So in short,...
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49 views

Tool for smart card based PGP decryption?

My problem (in case there's a solution I couldn't envision) I want to build a secure backup solution. As I own a smartcard, I thought to use asymmetric encryption with the private key remaining on ...
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2answers
179 views

CSPRGs in Python

I want to implement a CSPRNG for a stream cipher. I've tried implementing the BBS, but I've heard that it needs very big seeds to be secure. Is there a function in some library for Python 3 that adds ...
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1answer
42 views

DSA provider for java

What I want A DSA encryption and decryption provider for java. requirements 1-provides encryption and decryption with DSA: I don't need key generation because the official(and openjdk) provides ...
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1answer
39 views

crypto notes service

I'm looking for a online service similar to passpack.com but for notes, not for passwords. I want all the notes (plain text) has been encrypted on the server and decrypted on the client. The only ...
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123 views

Java library for threshold signatures

I need a library that implements threshold cryptography. The idea is to use the technique in a replicated system implemented in Java. So far, I have only found ThresSig (which implements Shoup's ...
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1answer
188 views

bare metal crypto library

I am writing an application that will be run on bare metal, i.e. it will not run on a kernel and therefore cannot invoke system calls. There will also be no C runtime. Is there a crypto library I can ...
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1answer
554 views

Small crypto library in C

What is the best C crypto library for small devices? My device is very limited in memory (only about 50 KB left). Also I do not need all of the fancy cryptography algorithms. An encryption, MAC ...
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2answers
303 views

Software for determining known text cipher type and key

I have a piece of encrypted text and the clear text. Do any open source tools (with sourcecode) exist that can help determine the type of cipher and the key? (Operating system or language is ...
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968 views

Lightweight crypto library to verify a signature

Are there any open source crypto libraries that can be used in embedded systems or in other memory constrained places like a boot rom? I am looking for libraries that I can compile only the algorithms ...
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2answers
8k views

Is there a lightweight library that can perform RSA-2048 encryption for an embedded application?

I'm looking for a C/C++ implementation of RSA with a 2048 bit key (preferably read from a file). My target is an embedded platform, so it comes with some odd restrictions. The hardware restricts us ...