Dennis Yurichev

[Crypto] Communicating with TPM 2.0: the first step

[Crypto] Time-based one-time password (TOTP) for 2FA, part II: YubiKey

Time-based one-time password (TOTP) for 2FA, part I

Unpacking a database of unknown type

Amateur cryptography: decrypting TVT CCTV camera config files

Cracking simple XOR cipher with simulated annealing, part II

My new linkedin profile

[SMT][Z3] Predicting Math.random() in Firefox using Z3 SMT-solver

Hire an author/writer

[Crypto] Toy SSH client in ~2k SLOC of Python, v6

[Math][Pentesting] Password requirements are harmful.

[RevEng][CS] Fuzzy topological sorting

IOCCC/mullender revisited, position-independent code, shellcode

[RevEng][x86][x64][C][newbies] Software reset in embedded devices

Hunting for extremal Latin squares using MaxSAT solver

Testing word counting code using KLEE and CBMC

[Math] Intervals: Apache Maven version numbers

[Math] Intervals: examples of open intervals; fencepost errors

[Pentesting][Math] Bruteforce passwords using cartesian product

[Math] Intervals: examples of closed intervals

[Math] Intervals: examples of half-open intervals

[Pentesting][Math] Finding masks for Hashcat using combinatorics

What is MQTT (IoT, smart homes) --- an explanation under 120 lines or 1100 words

[Math] Number of ways to insert 4 wires into 8-pin 8P8C Ethernet connector

Flatten function/operation in functional programming

[Unix][C] Similarities between Unix symlinks and C/C++ pointers/references

[Pentesting] Dahua (CCTV cameras) auth

[Pentesting] ONVIF (CCTV cameras) auth

[Pentesting] RTSP (CCTV cameras) auth

[Pentesting] Passwords from Wikipedia

[Pentesting] HTTP auth, part I: basic

[Pentesting] HTTP auth, part II: digest

[Pentesting] HTTP auth, part III: rogue web-server

[RevEng] Challenge: Ukrainian receipts: the solution

[RevEng] Toy decompiler

[Pentesting] The cost of cracking WPA2 (Wi-Fi) passwords in 2025

[Pentesting] Walking passwords, part II

Yet another XOR feature: a lamp turned on/off with several toggle switches

Two more uses of information entropy metric

Recovering/undeleting short deleted files in 50 SLOC of pure C, any filesystem supported.

Linux kernel compressed files have some text strings

Oracle zero-day vulnerability for sale

[Crypto] Leaking IV in CBC mode

Yet another explanation of the Quicksort algorithm

[Linux] Simplest possible snapshot-style backups using rsync

Cracking simple XOR cipher with simulated annealing

Packing students into dorm using simulated annealing

Make shortest cables in your rack using simulated annealing

Generating Malbolge code using simulated annealing

Worst sorting algorithm I ever saw: proving it using KLEE