SISHINGO IGUCHIinuwb.hashnode.dev·2d ago · 8 min readThe CCC Digital Key Authentication Flow, Step by StepThe previous post in this series established that UWB ranging in CCC Digital Key can't happen without BLE — BLE authenticates the key before UWB ever gets invoked. This post goes into that authenticat00
BRBetkyo Researchinbetkyo.hashnode.dev·6d ago · 9 min readOne rounding, not many: why a provably-fair verifier must match the server bit for bitOriginally published on the Betkyo Journal, where every figure is read from the game engine's source. Every provably fair round on this site turns a 256-bit hash into a number between 0 and 1 and then00
JJebitokinsharonjebitok.com·Sep 6 · 3 min readChallenge: Investigating with Splunk (TryHackMe)Link to Investigating with Splunk challenge on TryHackme SOC Analyst Johny has observed some anomalous behaviours in the logs of a few windows machines. It looks like the adversary has access to some 00
SSunnyincybersecurity-learning.hashnode.dev·Sep 2 · 20 min readTryHackMe — Cryptography Concepts | Learning GuideIntroduction The small padlock beside a website URL looks simple, but there is a lot happening behind it. When we send passwords, messages, banking information, or other sensitive data across the Inte00
VGVlada Gavriliucinprocurementdatareviewb.hashnode.dev·Sep 2 · 5 min readYour SSH and TLS Setup Is About to Become "Legally Obsolete"If you work with infrastructure, SSL certificates, SSH keys, or any system that relies on cryptography, you've probably heard the term "post-quantum cryptography" floating around for the past year. Bu00
VVaultKeepRinvaultkeepr.hashnode.dev·Sep 2 · 5 min readShamir Secret Sharing Password Manager: Breaking the Recovery ModelThe Password Recovery Problem That Cryptographers Solved in 1979 67% of users lose access to their password managers within two years due to recovery mechanisms that either compromise security or crea00
Aabiswasdevinombracrypt.hashnode.dev·Aug 28 · 2 min readI couldn’t find a local Post-Quantum file encryption tool, so I built my own. Looking for feedback. Any thought on this ? Hey everyone, I’ve been searching for a dedicated post-quantum cryptography (PQC) tool to secure my local files against "harvest now, decrypt later" attacks, but couldn’t find a standalone tool that f00
JOJeffrey Owolokoinjeffrey-owoloko.hashnode.dev·Aug 24 · 13 min readPerfect Secrecy: Why the Ultimate Cipher is UselessEvery cipher protecting your bank, your messages, and your passwords is breakable, not just theoretically inconvenient. Given enough time and computing power, they are breakable by methods that alread10
YPYogeshwar Peelainexploitnotes.hashnode.dev·Aug 23 · 6 min readBrunnerCTF 2026 : Magic or Not WriteupSummary The challenge provides four files (Brunner1.jpg, Brunner2.gif, Brunner3.png, Brunner4.bmp) that all report as generic data under file - none of them start with the magic bytes their extension 00
이이준김inyijunkim.hashnode.dev·Aug 21 · 6 min readWhat Cipher Is This? A Field Guide to Identifying Unknown CiphersYou've got a blob of mysterious text. Maybe it fell out of a CTF challenge, an escape room, a geocache, an ARG, or the margin of a secondhand book. It's obviously enciphered — but with what? Before yo00
