My blog

Welcome to the ultimate, radical and uncompromisingly primitive pre-web1.0-style blog and website. Let's party like it's ~1993-1996. This website is best viewed under lynx/links/elinks/w3m.

Main topics: CS, math, reverse engineering, SAT/SMT solvers, cryptography, tinkering with *NIX...

The posts:

• [Pentesting][Math] Finding masks for Hashcat using combinatorics (15-Dec-2025)
• What is MQTT (IoT, smart homes) --- an explanation under 120 lines or 1100 words (11-Dec-2025)
• [Math] Number of ways to insert 4 wires into 8-pin 8P8C Ethernet connector (09-Dec-2025)
• Flatten function/operation in functional programming (08-Dec-2025)
• [Unix][C] Similarities between Unix symlinks and C/C++ pointers/references (04-Dec-2025)
• [Pentesting] Dahua (CCTV cameras) auth (02-Dec-2025)
• [Pentesting] ONVIF (CCTV cameras) auth (28-Nov-2025)
• [Pentesting] RTSP (CCTV cameras) auth (24-Nov-2025)
• [Pentesting] HTTP auth, part III: rogue web-server (21-Nov-2025)
• [Pentesting] HTTP auth, part II: digest (21-Nov-2025)
• [Pentesting] HTTP auth, part I: basic (21-Nov-2025)
• [Pentesting] Passwords from Wikipedia (21-Nov-2025)
• [RevEng] Challenge: Ukrainian receipts: the solution (20-Nov-2025)
• [RevEng] Toy decompiler (17-Nov-2025)
• [Pentesting] Walking passwords, part II (13-Nov-2025)
• [Pentesting] The cost of cracking WPA2 (Wi-Fi) passwords in 2025 (13-Nov-2025)
• Two more uses of information entropy metric (10-Nov-2025)
• Yet another XOR feature: a lamp turned on/off with several toggle switches (10-Nov-2025)
• Recovering/undeleting short deleted files in 50 SLOC of pure C, any filesystem supported. (14-Oct-2025)
• Linux kernel compressed files have some text strings (02-Oct-2025)
• Oracle zero-day vulnerability for sale (18-Sep-2025)
• [Crypto] Leaking IV in CBC mode (16-Sep-2025)
• Yet another explanation of the Quicksort algorithm (23-Nov-2019)
• [Linux] Simplest possible snapshot-style backups using rsync (16-Oct-2019)
• Cracking simple XOR cipher with simulated annealing (21-Jul-2019)
• Packing students into dorm using simulated annealing (28-Jun-2019)
• Make shortest cables in your rack using simulated annealing (27-Jun-2019)
• Generating Malbolge code using simulated annealing (26-Jun-2019)
• Worst sorting algorithm I ever saw: proving it using KLEE (25-Jul-2018)
• Cracking simple LCG PRNG (02-Mar-2017)
• Content-addressable storage (27-Sep-2015)
• Typeless programming languages (BCPL, B), C evolution and decompiling (08-Sep-2015)
• Fuzzy string matching + simplest possible spellchecking + hunting for typos and misspellings in Wikipedia (23-Jul-2015)
• Tweaking LLVM Obfuscator + quick look into some of LLVM internals (16-May-2015)
• Making C compiler generate obfuscated code (07-Dec-2010)

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