Browse free open source Security software and projects below. Use the toggles on the left to filter open source Security software by OS, license, language, programming language, and project status.

  • 8 Monitoring Tools in One APM. Install in 5 Minutes. Icon
    8 Monitoring Tools in One APM. Install in 5 Minutes.

    Errors, performance, logs, uptime, hosts, anomalies, dashboards, and check-ins. One interface.

    AppSignal works out of the box for Ruby, Elixir, Node.js, Python, and more. 30-day free trial, no credit card required.
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  • Securden Privileged Account Manager Icon
    Securden Privileged Account Manager

    Unified Privileged Access Management

    Discover and manage administrator, service, and web app passwords, keys, and identities. Automate management with approval workflows. Centrally control, audit, monitor, and record all access to critical IT assets.
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  • 1
    OpenZeppelin Contracts

    OpenZeppelin Contracts

    OpenZeppelin Contracts is a library for secure smart contracts

    A library for secure smart contract development. Build on a solid foundation of community-vetted code. OpenZeppelin Contracts uses semantic versioning to communicate backward compatibility of its API and storage layout. To keep your system secure, you should always use the installed code as-is, and neither copy-paste it from online sources nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs. Reduce the risk of vulnerabilities in your applications by using standard, tested, community-reviewed code.
    Downloads: 8 This Week
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  • 2
    Qtum

    Qtum

    Qtum Core Wallet

    Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine-based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. If you are testing the network or developing unstable software on Qtum, we highly recommend using either testnet or regtest mode. A Proof of Stake consensus system which is optimized for Qtum's contract model. Any user can stake and help to secure the network. There is no voting, master nodes, or minimum amount required. There have been transactions as small as 2 Qtum that have created blocks in the past. Staking from smart contracts is under development.
    Downloads: 8 This Week
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  • 3
    SQUEEZER

    SQUEEZER

    Squeezer framework, build serverless dApps

    Squeezer is a platform that empowers new-entry blockchain developers to build serverless dApps simply as dead. The main usage of the ChainKit is to unify top blockchains interfaces into a single normalized API interface, therefore you can build blockchain dApps easily without digging into blockchain complex infrastructure. Bi-directional on-chain transactions (inbound and outbound). Build dApps connecting to smart contracts using chain kit agnostic connector. Quick intuitive code deployments by using a special mechanism that will deploy smart contracts and dApp services where code changed. Silent deployments, no interruption for the current functionality (really useful on production). One single command to simultaneously deploy all available functions on your project where code changed from the last deployment. Test your code locally on a simulated functions platform for a faster development cycle.
    Downloads: 8 This Week
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  • 4
    bitResurrector

    bitResurrector

    Bitcoin private key recovery tool with Bloom Filter & CUDA

    BitResurrector v3.0.3 is a high-performance security research tool designed for digital archaeological tasks: recovering access to abandoned Bitcoin assets. The engine exploits specific entropy vulnerabilities (CVE-2013-7372) and uses a 9-echelon statistical filter to segregate mathematical "corpses" from potentially valid keys. Technological Stack: - Zero-Latency Bloom Filter: Real-time matching against 58M+ active addresses (Loyce Club data). - Turbo Core: C++/AVX-512 optimization with processor affinity. - GPU Mode: Massive parallel computation via NVIDIA CUDA. - Memory Management: Zero disk I/O lag using mmap (Memory-Mapped Files). BitResurrector is a closed-source, proprietary tool for researchers and professionals.
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    Downloads: 112 This Week
    Last Update:
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  • Agentic AI SRE built for Engineering and DevOps teams. Icon
    Agentic AI SRE built for Engineering and DevOps teams.

    No More Time Lost to Troubleshooting

    NeuBird AI's agentic AI SRE delivers autonomous incident resolution, helping team cut MTTR up to 90% and reclaim engineering hours lost to troubleshooting.
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  • 5
    Bitcoin Private Key Calculator
    A simple program to bruteforce a bitcoin address private key
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    Downloads: 39 This Week
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  • 6
    WeIdentity
    WeIdentity is a set of distributed multi-center technical solutions that can carry the credible mapping of the actual identity and chain identity of the entity object (person or thing), as well as the realization of safe access authorization and data exchange between the entity objects. WeIdentity is independently developed and fully open source by the Microbank. It adheres to the concept of public alliance chains integrating resources, exchanging value, and serving the public. It is committed to becoming a distributed commercial infrastructure linking multiple vertical industry fields, promoting pan-industry, cross-institution, and cross-regional. Identity authentication and data cooperation. In the traditional way, user registration and identity management are completely dependent on the single center's registration agency; with the emergence of distributed ledger technology (such as blockchains), distributed multi-center identity registration, and identification.
    Downloads: 4 This Week
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  • 7
    key-elf

    key-elf

    Forensic tool to recover lost BTC private keys.

    A powerful utility to hunt down Bitcoin private keys from deleted wallet.dat files or damaged hard drives. If you accidentally deleted your Bitcoin Core wallet or formatted your disk, this tool can help. It bypasses the file system and scans the raw data directly, looking for the unique "fingerprint" (ASN.1 signature) of Bitcoin private keys to recover them from the digital wreckage.The Graphical User Interface (GUI) is the advanced/premium version. If needed, please visit: https://gitlab.com/8891689/key-elf
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    Downloads: 21 This Week
    Last Update:
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  • 8
    BIP39-XOR

    BIP39-XOR

    Encrypt or decrypt 12, 15, 18, 21 or 24 BIP39 codewords array ("seed")

    Encrypt or decrypt 12, 15, 18, 21 or 24 BIP39 codewords array (so-called "seed phrase") using exclusive OR (XOR)/Vernam cipher (a.k.a. One Time Pad). If not input by a user, an encryption key is automatically generated at random. Encryption with such a key preserves integrity of BIP-39 checksums of all keys (that's distinct while also compatible with SeedXOR implementation).
    Downloads: 10 This Week
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  • 9
    Naeon

    Naeon

    The safest way to store private data in untrusted (cloud) environments

    Naeon is a data encryption and sharding method designed to secure data in potentially untrusted off-site storage locations. It uses AES-256 encryption with a randomly generated passphrase, followed by obfuscation techniques to make the encrypted file unidentifiable. The data is then sharded into one private chunk containing the encryption key and part of the data, and multiple public chunks. Each chunk is renamed using its SHA-512 hash, and all chunks are timestamped equally. A filename conversion table is created to restore the concatenation order during a restore. The method aims to guarantee confidentiality, integrity, and availability of data, regardless of the trustworthiness of the chosen storage environment, while protecting against data breaches and unauthorized access. Threshold Key Sharing further enhances security and resilience by splitting the private key into parts requiring cooperation from multiple parties for reconstruction, thereby minimizing single points of failure.
    Downloads: 9 This Week
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  • Comet Backup - Fast, Secure Backup Software for MSPs Icon
    Comet Backup - Fast, Secure Backup Software for MSPs

    Fast, Secure Backup Software for Businesses and IT Providers

    Comet is a flexible backup platform, giving you total control over your backup environment and storage destinations.
    Learn More
  • 10
    Hercules_free_version

    Hercules_free_version

    Almacenamiento seguro offline para semillas BIP39 con cifrado avanzado

    HERCULES Crypto Pendrive es una aplicación diseñada para proteger tus semillas de criptomonedas (BIP39) de forma segura y totalmente offline. A diferencia de métodos tradicionales como papel, notas digitales o almacenamiento en la nube, esta solución elimina la exposición a internet, reduciendo significativamente el riesgo de hackeos, malware o accesos no autorizados. El software utiliza cifrado avanzado para garantizar que tu información permanezca protegida en todo momento. Su funcionamiento es sencillo e intuitivo, pensado tanto para usuarios técnicos como para inversores que buscan máxima seguridad sin complicaciones. HERCULES no se conecta a la red, no accede a tus fondos y no requiere datos personales, lo que garantiza privacidad total. “Software firmado digitalmente con certificado de firma de código de SSL.com.” File signed with certificate: Owner: Wladimir Marino Materan Velasquez SerialNumber: 107926026636172561193259228594730909048
    Downloads: 2 This Week
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  • 11
    Sterlingcoin

    Sterlingcoin

    Low Fees | No Banks | 5.5% Interest | Transfer Worldwide

    Sterlingcoin is a digital currency used to pay for goods or services in daily life both offline and online. It is a decentralised system controlled by an open market and not by a corporation, bank or government. Because of its decentralisation everyone who runs the Sterlingcoin wallets shares the public ledger*. Sterlingcoin is a completely fair**, transparent and a highly secure form of currency for all needs. The price of Sterlingcoin is determined by supply & demand, use, trading and mining***. *Transaction history of every Sterlingcoin wallet **A limited supply of money would allow for a better economy; where ‘better’ means ‘fairer’, more stable and devoid of government intervention. ***Maintaining the block chain is called mining, and those who do so are rewarded with newly created Sterlingcoin and transaction fees.
    Downloads: 2 This Week
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  • 12
    BitCrazy's Faucet-in-a-Box Mod

    BitCrazy's Faucet-in-a-Box Mod

    Mod of the original Faucet-in-a-Box faucet PHP script

    Mod of the original Faucet-in-a-Box faucet PHP script (based on its revision 69). Includes pre-installed Anti-Bot Links 5.75, full support of user balances, countdown timer and some other improvements and cool features. ======================================== Minimum requirements: PHP 5.4.4+ (5.5 recommended) MySQL (5.6 recommended) ======================================== CHANGELOG { [F] - bugfixes, [+] - new features, [!] - known issues } Current release (version 7): [+]: CACert.pem updated to latest version. [+]: FaucetHub.php was replaced with native FaucetHub library! [+]: Faucet now has page "Currency rate", where you can see USD price of selected currency. [+]: Anti-Bot Links were updated to version 5.75 [F]: + various related fixes & small changes. [!]: Script has no support for FaucetHub's "last_status" code and "checkAddress()" fn (at least, now)
    Downloads: 0 This Week
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  • 13
    Cardano SL

    Cardano SL

    Cryptographic currency implementing Ouroboros PoS protocol

    Cryptographic currency implementing Ouroboros PoS protocol. The cardano-node is the top level for the node and aggregates the other components from other packages: consensus, ledger and networking, with configuration, CLI, logging and monitoring. The node no longer incorporates wallet or explorer functionality. The wallet backend and explorer backend are separate components that run in separate external processes that communicate with the node via local IPC. The new Cardano implementation consists of more granular components.
    Downloads: 0 This Week
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  • 14

    CryptoFlouze

    This software display the last prices of the top 20 cryptocurencies

    This software download and display the last prices of the top 20 cryptocurrencies on the market. All the data are updated at every run. The data is downloaded from : https://coinmarketcap.com/api/ For windows : Download this zip file, unzip everything in the same directory. The data are updated at every run. For other operating systems : Run it from the source. https://github.com/hamdyaea/CryptoFlouze Developer - Author Hamdy Abou El Anein
    Downloads: 0 This Week
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  • 15
    Downloads: 0 This Week
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  • 16
    Pasword generator RORG

    Pasword generator RORG

    Securely generate passwords using UTF16 and Random.org

    This application offers the ability to generate passwords using atmospheric noise withthe service random.org or fully local key creation. The application generates random characters from the entire UTF-16 range and converts them into one long string. INSTALATION: No installation is needed. Simply extract the folder PR-RORG.zip and use it. The application keeps its settings (including the API key) in its folder located within C: Program Files. Frequently asked questions (FAQs) in file FAQ.txt
    Downloads: 0 This Week
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  • 17
    Sign-In with Ethereum

    Sign-In with Ethereum

    Sign-In with Ethereum library

    Sign-In with Ethereum is a new form of authentication that enables users to control their digital identity with their Ethereum account and ENS profile instead of relying on a traditional intermediary. Already used throughout web3, this is an effort to standardize the method with best practices and to make it easier for web2 services to adopt it. Sign-In with Ethereum describes how Ethereum accounts authenticate with off-chain services by signing a standard message format parameterized by scope, session details, and security mechanisms (e.g., a nonce). The goals of this specification are to provide a self-custodied alternative to centralized identity providers, improve interoperability across off-chain services for Ethereum-based authentication, and provide wallet vendors a consistent machine-readable message format to achieve improved user experiences and consent management.
    Downloads: 0 This Week
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  • 18

    chaOS41

    A cryptocurrency like Bitcoin improved upon with reality binding.

    There is a reason this project holds no code. chaOS41 is a cryptocurrency with reality binding. A given value of money was paid for a surface area the size of a flower pot. It was out of proportion. The chaoOS41 currency corrects that. It binds its value to reality. Its unit value is a ratio between money and land area.. When that ratio normalizes, the currency becomes available to the public. 1 more developer is wanted. For that you need inside access, which means the access protocol is made public now. It is also the open-source cryptographic protocol. Type in a formatted string as "beacon" and a number. Repeat. When the identical string is produced, prepare. When the identical string repeats, a name is added. This signals that the next line of text you type, is registered. Hint: include a URL.End of protocol. Valid beacon digits are 250, 1024, 2048, 4096, 8192, 16384, 32768 and up.
    Downloads: 0 This Week
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  • 19
    Iron is synonym for chain and bar is a synonym for block. This project is to develop an SSI system using block chain protocol that can be used in authentication scenerios like games. It's not limited to games, just an example. see https://github.com/tatmanblue/ironbar
    Downloads: 0 This Week
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