Questions tagged [cryptography]

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29 questions with no upvoted or accepted answers
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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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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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52 views

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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68 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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385 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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36 views

Is there a usable CLI interface to libsodium?

I am hoping to ditch PGP in favor of a simpler and more modern tool. I understand that libsodium implements symmetric key encryption, non-repudiable signing (I think), authenticated (repudiable) ...
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1answer
497 views

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 a ...
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55 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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170 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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15 views

Is there a script to find/extract steganographically hidden files in all images of a directory?

Is there a script to detect and extract files that were steganographically hidden in images? It would be best if it was a Python script and scanned for as many methods of steganography as possible. It ...
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45 views

Is there a KSP-to-PKCS#11-Bridge?

We are using a lot of cryptographic operations via the Windows CNG (which in turn uses a KSP to obtain keys for the cryptographic algorithms it executes). Most HSM vendors provide a KSP implementation,...
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654 views

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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1answer
49 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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115 views

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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49 views

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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32 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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24 views

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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27 views

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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14 views

Looking for quantum-resistant cryptography package for Flutter/Dart

I recall seeing some sort of potential quantum-resistant cryptographic algorithm in a Flutter package API however I have searched and searched again and cannot find anything. Anyone know of any ...
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6 views

XMPP/OMEMO server and client written in memory safe language

Is there an XMPP server and client with OMEMO support that is written in a memory safe language? it must be free software and run on linux.
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39 views

CA for Ed25519ph signing x.509 certificates

I am looking for a CA that supports Ed25519ph signing. I tried Microsoft/OpenSSL/EJBCA, but none of them are supporting Ed25519ph. any suggestion about CA/PKI that can support ED25519PH?
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Keccak hashing utility

A utility software (for linux bash) to perform Keccak hashing. I have come across this package: https://github.com/maandree/sha3sum, however it contains no information on how to build, nor was I able ...
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13 views

Python library recommendations for cryptography

Which open source library that implements all steps of HE schemes namely: key generation, encryption, decryption and evaluation for the following algorithms: RSA, El Gamal and LWE (learning with ...
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6 views

Production-grade libraries for zero knowledge proof algos?

Are there any freeware libraries out there that are generally considered "production grade" for zk-STARK, zk-SNARK and similar? The ones I've found so far always stated explicitly that they ...
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19 views

Is possible to do a good FDE on Windows 10?

I would like to be able to encrypt my system disk in the classic way, using a password that is used to encrypt the disk. It is not possible to use bitlocker unless you accept to keep the key in the ...
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20 views

Which libraries to use to implement cryptographic functions?

I am using python3 to implement a Vehicular ad hoc network's solution using cryptography. In python3 I found many cryptographic libraries to implement algorithms such as RSA, AES, etc. But none about ...
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1answer
181 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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47 views

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
63 views

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 ...