Cryptography

rockwellshah/filekey

Offline, open-source web app for passkey-based file encryption and sharing. AES-256-GCM/HPKE, no cloud, no accounts; encrypt to recipients with…

sabir555s/insta_cyber

Performs dictionary-based brute-force login attacks against Instagram accounts using Python, with optional Tor support for anonymized authorized…

danyw24/zyxel-p870hn-hardware-hacking

From a bare PCB to root: hardware-hacking a ZyXEL P-870HN (BCM6368) over UART — CVE-2025-0890 + CVE-2024-40891, on my own hardware.

pugazhendii22/keepass-exfil-forensics

Network forensics writeup + tooling for a TryHackMe DFIR challenge: reverses a hex→Base64→XOR exfiltration chain from PCAP traffic, then recovers a…

xaxis/bitcoin-security

Educational study of Bitcoin key entropy: weak-RNG wallet enumeration (Milk Sad / CVE-2023-39910 class) vs. the infeasibility of brute-forcing a good…

keerthivasan-sankar/secure-vault-for-commercial

Encrypts and decrypts files and folders on Windows with AES-256-GCM, using a USB physical key plus password-derived wrapping, integrity checks,…

plunder707/attestos

Bazzite plus a TPM boot attestation layer. Work in progress: builds unverified, UKI mechanism unresolved. Spec: github.com/plunder707/attested-gaming

signalapp/key-transparency-auditor

Continuously fetches and cryptographically verifies key transparency log updates, maintains a condensed prefix and log tree view, and returns signed…

yubico/libfido2

Provides library functionality for FIDO2, including communication with a device over USB or NFC.

signalapp/libsignal

Home to the Signal Protocol as well as other cryptographic primitives which make Signal possible.

eliavila10/project_bias

High-performance, bias-free cryptographic engine in Ada/SPARK leveraging native OS entropy pools.

priyanshu-rawa/cybersecurity-handbook

A community‑driven cybersecurity knowledge base with 400+ notes, mind‑maps, and cheat‑sheets – built from first principles. Ideal for students, SOC…

ryehr/hitms_steganography

Embed multiple secret messages in LLM chat token choices using arithmetic/Discop steganographic coders, with bit-exact decoding and steganalysis…

nlnetlabs/nsd

High-performance authoritative DNS server with DNSSEC support, delivering RFC-compliant name resolution for secure and reliable production…

bunnie/dc34-vault

Vault app for DC34 badge

emn4tor/seal

Peer-to-peer, end-to-end encrypted chat. No inbox. No account to recover. Nobody's listening — not even us.