Where I explore PostScript as a programming language, creating images and games, for printer and desktop.
| 2025-04 | Programming in PostScript "Retro Coding Fun: Games on your Printer" Full talk (in French) with annotated slides |
| 2025-04 | A simple PostScript / PDF polyglot (Gist) will be interpreted differently by PostScript and PDF interpreters |
| 2025-04 | PostScript clock (Gist) with print a clock with handles showing current time |
| 2025-03 | A rotating cube in PostScript |
| 2025-03 | Minifying PostScript Tiny Ray Tracer |
| 2025-02 | PostScript mode for SubEthaEdit (GitHub) or postscript.seemode.zip |
| 2025-02 | Tetris in PostScript (GitHub) |
| 2025-01 | Sokoban in PostScript (GitHub) |
| 2025-01 | Amstrad CPC Color Palette in PostScript, Gist: cpc.ps, cpc2.ps |
| 2024-11 | PostScript - 2 minutes video for Black Alps rump sessions |
| 2024-03 | Programming in PostScript (obsolete) |
| 2024-04 | PSTicTacToe - Play TicTacToe against your PostScript printer |
| 2024-03 | PSChess A Chess Engine in PostScript - GitHub repo, Hacker News, Hackaday |
| 2023-12 | bfps - a Brainfuck interpreter written in PostScript (GitHub, Hacker News comments) |
| 2022-10 | Intersecting Planes Reproducing an image with intersecting planes in Postscript |
| 2022-10 | Isometric Stairs Isometric stairs in minimal Postscript |
| 2022-09 | Postscript Golfing writing a tiny Postscript program drawing Swissquote logo |
| 2022-09 | schotter.ps gist |
Where I demonstrate that JSON apparent simplicity is just hidden complexity that can lead to software errors and security issues.
| 2018-03 | Parsing JSON Considered Harmful, Toulouse Hacking Conference (slides) |
| 2016-11 | Presentation at Black Alps Security Conference, Yverdon (slides) |
| 2016-11 | Article and comments in The Register |
| 2016-10 | Presentation at Soft-Shake Conference, Geneva (slides) |
| 2016-10 | First version of the article |
| 2016-10 | JSON Test Suite (GitHub) |
| 2016-07 | A JSON Parser in Swift 3 compliant with RFC 7159 (GitHub) |
Where I explore various ways to draw on screen programmatically and create interesting code, images and data visualisations.
| 2024-11 | Old Macintosh Screensaver Reproducing an early 90s Macintosh screensaver with PyGame |
| 2023-04 | Les Tuiles de Wang Atelier de programmation pour enfants (code, sample image) |
| 2022-09 | circles.py gist, circles.ps gist |
| 2022-09 | Intertwined - Draw intertwined threads, knots and knitting figures with PyCairo (GitHub) |
| 2022-06 | truchet.py (gist) |
| 2021-12 | Isometric - An isometric screensaver for macOS, written in Swift (GitHub) |
| 2021-10 | IsoRenderer - A 2D, Cairo-based isometric renderer in Python 3 (GitHub) |
| 2020-12 | maze.py - algorithm to draw a maze (gist) |
| 2019-01 | sq_logo_animated.gif (gist) |
| 2019-01 | PyCairoVisualDoc - https://seriot.ch/pycairo/ Visual documentation generator for PyCairo. (GitHub) |
| 2018-11 | rainbow_rain.py (gist) |
| 2018-11 | schotter_color.py (gist) |
| 2018-11 | schotter.py (gist) Reproducing "Schotter" by Georg Nees with pycairo |
| 2018-11 | PulsarRuns - Pulsar-plot of Strava runs (GitHub) |
| 2018-11 | BitmapCanvas - Bitmap offscreen drawing in Swift for OS X (GitHub) |
| 2018-03 | kovach_pycairo.py (gist) Reproducing Benjamin Kovach's art with pycairo |
| 2016-11 | Swift Data Visualization workshop, Swift Alps Conference (slides, GitHub) |
| 2016-11 | DevTeamActivity - Generates a picture summarising the activity of a dev team on one or several repositories (GitHub) |
| 2016-11 | STMovingImages - Create .MOV and .GIF from NSImages in Swift 3 (GitHub) |
| 2016-01 | STStrava - Experimental visualisation of runs using Swift and Strava API (GitHub) |
| 2013-01 | draw_bytes.py - Draws any file as a picture considering its bytes as pixel colors (GitHub) |
| 2012-07 | MathPlotLibs Experiments (GitHub) |
| 2012-06 | efx-backtest - Backtest your eForex trading strategies (GitHub) |
| 2012-04 | Home Made Maps - Python scripts to generate "centered time-distance maps" (GitHub) |
Where I explore Unicode specifications, their implementation in various environments, edge cases and some security aspects.
| 2014-11 | Unicode Hacks, AppSec Forum 2014, (slides) |
| 2014-10 | I � Unicode, SoftShake 2014, (slides) |
| 2014-10 | Unicode Poster, (GitHub) |
| 2013-01 | UniBinary, an efficient algorithm to encode/decode data into printable Unicode characters, (GitHub) |
As a trail runner and Unicode enthusiast, I am a proud sponsor of characters:
🏃♂ U+1F3C3 U+200D U+2642 U+FE0F man runner
⛰ U+26F0 mountain
🏔 U+1F3D4 snow capped mountain
Where I reverse engineer and document Twitter API, exploit vulnerabilities to automatise account creation and get access to user accounts.
| 2015-04 | 3 Nasty Twitter API Hacks, DahuCon, (redacted slides): Account Takeover, Automated Account Creation, SMS Abuse |
| 2014-05 | STTwitter - A stable, mature and comprehensive Objective-C library for Twitter REST API 1.1 (GitHub) |
| 2014-05 | STTwitter, CocoaHeads Lausanne, (slides) |
| 2013-10 | iOS / Twitter Integration, SoftShake 2013, (slides) |
| 2013-10 | Abusing Twitter API, One Year Later, AppSec Forum 2013, (slides, video) |
| 2013-04 | Abusing Twitter API and OAuth Implementation, Hack In The Box 2013, Amsterdam, (article, slides, video) |
| 2012-11 | Abusing Twitter API, AppSec Forum 2012, (slides) |
| 2009-04 | TwitHunter - An experimental Twitter client with scoring for Mac OS X (GitHub) |
Where I explore the various definitions of time, how time is managed by computers, and the troubles that can arise.
| 2015-10 | Time and Computers, SoftShake 2015 (slides) |
Where I discuss what is an error and various error handling strategies.
| 2016-14 | HTTPRequests - NSURLRequest extensions in Swift, demonstrating various error management strategies (GitHub) |
| 2016-04 | Error Handling, AppBuilders, Zürich (slides) |
Where I explore computation, Turing completeness and esoteric programming languages.
| 2023-05 | Simulating Turing Machines with Wang tiles (article, GitHub) |
| 2023-05 | A tiny Turing machine for 2-symbols Busy Beavers. No variable for state. Program is kept on input string. Gist |
| 2017-11 | Game of Life Visualization (gist 1, gist2) |
| 2017-10 | From Brainfuck to Domino Computers, SoftShake 2017 (slides) |
| 2017-07 | Fluid simulation from 1D cellular automata (gist) |
| 2017-06 | Wireworld - A simple Wireworld cellular automaton explorer in Swift (GitHub) |
| 2017-06 | ECAExplorer - ECAExplorer - A simple and interactive tool to explore Elementary Cellular Automata, in Swift (GitHub) |
| 2017-03 | Brainfuck - A flexible Brainfuck interpreter in Swift 3.1 (GitHub) |
Where I create a pseudo RPG for my kids.
An original and unique creative game that I've create with and for my kids.
The game will remain unpublished because it is using proprietary assets from 3rd parties.
Presentation: 20170126_mighty_bayard.pdf
Where I explore languages, formats, tools and protocols by writings working programs with a minimal number of bytes.
| 2015-07 | A Tiny NTP client in 79 characters |
| 2012-12 | Hello Mach-O. Dissection of minimal Intel 32-bits, 204 bytes, Mach-O "Hello World" executable file. |
Where I describe the design of the Objective-C Runtime, provide tools and several tips and tricks to ease debugging.
| 2013-01 | Draws dependancies among classes out of an Objective-C code base (GitHub) |
| 2011-07 | Tries to find unused Objective-C methods by examining binary files (GitHub) |
| 2011-03 | Objective-C Runtime: Cocoa's Jewel in the Crown. (NSConference 2011, slides) |
| 2008-2018 | Dumps of classes and methods from the Objective-C runtime. For iOS and macOS. (GitHub) |
| 2008-2018 | iOS and Mac OS X Obj-C Runtime Browser (GitHub) |
Where I demonstrate that, despite Apple claims, a malicious iPhone app can harvest a user data without even using private APIs.
| 2010-11 | iOS 4 Privacy, DefCon Switzerland HashDays 2010 (video, slides)
| 2010-09 | iOS 4 Privacy, Compass Security Event 2010.
| 2010-04 | iPhone and AppStore: Security and Privacy. Workshop on mobile security, Federal Intelligence Service FIS, Reporting and Analysis Centre for Information Assurance MELANI, Bern.
| 2010-02 | iPhone Privacy, February 3rd, Black Hat DC, Arlington, VA, USA, white paper, Black Hat slides, SpyPhone Project on github, 81 citations, Forbes, Wall Street Journal
| 2009-12 | iPhone Privacy, December 2nd, développeurs iPhone de Suisse Romande, Geneva Airport. SpyPhone Project on GitHub
| 2011-12 | Growing iOS Projects. CocoaHeads Lausanne, (slides) |
| 2011-05 | Subclassing UIControl using CoreAnimation. CocoaHeads, Swissquote Bank, Gland. (slides, GitHub) |
| 2010-05 | Building a vertical tab bar controller for the iPad, macprofessionals.ch user group, Bern. (slides, GitHub) |
| 2009-12 | What you can do with iPhone's Camera, Netinfluence iPhone Conference. |
| 2009-12 | iPhone Unit Tests, CocoaHeads Lausanne |
| 2007-01 | Django, a new Python web framework. Sen:te, Lausanne |
Where I produce criminal intelligence out of a spams dataset.
| 2010-05 | Thèse de master Master LCE, 12ème colloque de l'Association Internationale des Criminologues de langue Française, Université de Fribourg, (résumé, slides) |
Where I explore open banking and provide business development recommendations for Swissquote.
| 2020-10 | EPFL EMBA Thesis, (Executive Summary, redacted). Keywords: open banking, fintech, payments, strategic management, open innovation. |
| 2021-10 | Dent du Bourgo et Tsermon |
| 2020-11 | Villars-Tiercelin |
| 2017-06 | Lavaux |
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