Questions tagged [cryptography]

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12
votes
3answers
932 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 ...
6
votes
1answer
179 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 ...
5
votes
0answers
101 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 ...
5
votes
0answers
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,...
4
votes
1answer
510 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 ...
4
votes
0answers
35 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 ...
4
votes
0answers
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 ...
3
votes
1answer
7k 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 ...
3
votes
2answers
173 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 ...
3
votes
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 ...
3
votes
0answers
288 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/ ...
2
votes
2answers
72 views

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 ...
2
votes
0answers
49 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 ...
2
votes
0answers
117 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 ...
1
vote
2answers
142 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?
1
vote
1answer
60 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 ...
1
vote
2answers
295 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 ...
1
vote
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 ...
1
vote
0answers
27 views

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 ...
1
vote
0answers
48 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 ...
1
vote
0answers
128 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 ...
1
vote
0answers
53 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....
1
vote
0answers
32 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.
1
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0answers
22 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 ...
1
vote
0answers
18 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,...
1
vote
0answers
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 ...
0
votes
2answers
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 ...
0
votes
0answers
4 views

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-...
0
votes
0answers
3 views

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 ...
0
votes
0answers
12 views

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 ...
0
votes
0answers
6 views

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 ...
0
votes
1answer
74 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, ...
0
votes
0answers
18 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 ...
0
votes
1answer
12 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 ...
0
votes
0answers
20 views

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 ...
0
votes
0answers
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 ...
0
votes
0answers
47 views

JavaScript library for decrypting XChaCha20-Poly1305-IETF

I used Libsodium.js to encrypt some text (demo fiddle here), and then I learned that Libsodium.js doesn't support iOS 11.2. I now need an alternative JavaScript library that can encrypt and decrypt ...
0
votes
1answer
189 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 ...
0
votes
0answers
35 views

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 ...