Aabiswasdevinombracrypt.hashnode.dev·16h ago · 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·4d ago · 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·5d ago · 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
AGAbhinay Gokulinblog.perceptova.com·Aug 18 · 4 min readWhy does a five-minute photocopy need a permanent chat thread?Most software that moves files is built to keep them. Drive keeps them. Photos keeps them. Messaging apps keep them so conversations still make sense next week. That retention model is correct for col50
VCVictor Chukwuemeka Onwuegbuchuleminvictor-chukwuemeka.hashnode.dev·Aug 14 · 18 min readTLS and Certificates: How Two Strangers Agree on a Secret, and Why Your Browser Trusts AnyoneLast post ended with a promise. We had explained that HTTPS is ordinary HTTP running inside an encrypted tunnel called TLS, Transport Layer Security, and that this tunnel provides confidentiality, int00
IIvaninsup4ikxprojects.hashnode.dev·Aug 14 · 8 min readWe're Building a Protocol Analyzer That Finds Attacks and Fixes ThemA report on a tool still in development \E2\80\94 the architecture we chose, the trade-offs we made, and why we believe this direction has a future. This article is not a product announcement. It is 00
SS4JIDinephemeral-trust.hashnode.dev·Aug 13 · 7 min readBlockchain-Anchored Tokenization for Time-Bound Secure Shell AuthenticationRemote software teams routinely need broad access to a company's most valuable digital assets, such as proprietary source code and sensitive operational data, which makes the access model itself a sec10
YPYogeshwar Peelainexploitnotes.hashnode.dev·Aug 10 · 35 min readTryHackMe : Overflow The Jackpot writeup# Challenge Category Flag 1 B1t Recovery Crypto THM{[REDACTED]} 2 Lost Fortune Included Web THM{REDACTED} 3 Casino Heist Forensics THM{REDACTED} 4 Fresh Powder - Bonus Challenge Detection Eng10
BSBibash Shresthainbibashshrestha.hashnode.dev·Aug 9 · 5 min readPlayfair Cipher Explained: The Encryption British Soldiers Used in the FieldAn officer in the field needs to send a message that can't be read if intercepted. No radio, no computer, just pen, paper, and a shared keyword with whoever's receiving it. Simple substitution ciphers00
