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Délimiteur de données: October 2015

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Thursday, October 22, 2015. Gracker - it's a good game for beginners to develop skills in searching and exploiting vulnerabilities. To start the game connect using SSH to level0@gracker.org with password level0. After solving each level you could read solution (recap) from the author. I recommend this game if you are interested in CTF and want to improve your skills. Check also smashthestack. If you haven't seen yet). You can also read about creating this game on the author's site:. All around the world.

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Délimiteur de données: Hack You SPb 2016 - Stegano 300 writeup

http://delimitry.blogspot.com/2016/10/hack-you-spb-2016-stegano-300-writeup.html

Saturday, October 22, 2016. Hack You SPb 2016 - Stegano 300 writeup. This task is by. Vlad Roskov (vos) and called Gemorroy (i. e. Hemorrhoid). We are given a png image:. I've written simple Python script to get all IDAT blocks from png image and decompress them. Open( 'steg300 where 8c7f6f7.png'. F: data = f.read() # get all IDAT blocks. Idats = [] while. True: idat pos = data.find( 'IDAT'. Idat pos 0: break. Size = struct.unpack( ' I'. Idats str = '. Join(idats) # decompress IDAT blocks. Therefore Ive ...

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Délimiteur de données: December 2016

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Thursday, December 22, 2016. Finally finished a book "Computer Networks" by Andrew S. Tanenbaum and Davis Wetherall. It is really good academic introduction for everyone interested in and works with computer networks. A good explanation of how the networks works on each level is given. All popular protocols, network security, encryption and compression algorithms are reviewed. This book helps to organize knowledge about all these issues. Highly recommend to look at this book. Sunday, December 4, 2016.

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Délimiteur de données: June 2016

http://delimitry.blogspot.com/2016_06_01_archive.html

Tuesday, June 14, 2016. This weekend I've implemented own QR Code generator in pure Python. The link to github repository: https:/ github.com/delimitry/qr code generator. I want to share amusing QR codes I've found during testing of my QR code generator. A mode is "numeric", error correction level is "Q", here version is 20 (97 x 97), masks 0 to 7. Module size is 2 pixels. The encoded data contain only zeros, so the error correction codes also contain zeros. That's why the patterns are so uniform.

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Délimiteur de données: December 2015

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Saturday, December 26, 2015. R2D2-style sound generator in Python. I've wrote a StarWars' R2-D2-style sound generator in Python. A link to my repo on github is: https:/ github.com/delimitry/r2d2 sound. To play wav file uses sound-playing interface for Windows (module winsound). Monday, December 14, 2015. Python 3 check using type([1.0 for i in [1] [0]) is type([1 for i in [1] [0]). In Python 3 the result is:. But in Python 2:. It is interesting that items' types in Python 3 are both float:. Line 3 ) .

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Délimiteur de données: April 2016

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Thursday, April 28, 2016. Maximum lines of code for Python script. I've created a script with 10 million non-empty and non-comment lines. Python process has consumed over 10 Gigs of RAM, but successfully executed :). So what is the maximum lines of code permitted in Python? Sunday, April 24, 2016. Python frozen modules hello and phello. Under Python 2.7:. Import phello .spam. Under Python 3.x:. If check a file of this modules the next result will be returned:. Hello . file. Impis frozen(' hello '). Sunda...

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Délimiteur de données: August 2016

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Friday, August 26, 2016. Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp — Philip Greenspun. Organizations which design systems . are constrained to produce designs which are copies of the communication structures of these organizations — Melvin Conway. Sunday, August 14, 2016. Aztec Code generator in Python. Here are some resulting Aztec codes:. This is 71x71 Aztec code with 394 ' x00' bytes :. Поучительна...

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Délimiteur de données: October 2016

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Saturday, October 22, 2016. Hack You SPb 2016 - Reverse 300 writeup. Task is called Serious Business, a. Uthor: Arthur Hanov (awengar). Task comment: nc 78.46.101.237 3177, and give me a shell. We are given a b. Inary file rev300 f3c8cc9.elf. And address/port with service. After disassembling and restoring the important functions from the binary, it became clear how to solve this task. By the way this task is also could be in Pwn category. I've renamed some variables:. I = 0; i size; i) { if. 0; } return.

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Délimiteur de données: February 2016

http://delimitry.blogspot.com/2016_02_01_archive.html

Saturday, February 13, 2016. Octree color quantizer in Python. Some time ago I found interesting octree color quantization. Algorithm, previously often used in computer graphics (when devices can display only a limited number of colors), and nowadays mainly used in gif images. I've implemented one of the most used algorithm of octree color quantization in Python. Here is a repository on github: https:/ github.com/delimitry/octree color quantizer. Original image (24 bit):. Start at the level 0. If the nex...

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Délimiteur de données: Hack You SPb 2016

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Saturday, October 22, 2016. Hack You SPb 2016. I've played Hack You SPb CTF. This week and it finished today. I've solved 16 out of 18 tasks, and ranked 10th. Here are my write-ups:. Http:/ delimitry.blogspot.com/2016/10/hack-you-spb-2016-stegano-300-writeup.html. Http:/ delimitry.blogspot.com/2016/10/hack-you-spb-2016-reverse-300-writeup.html. Subscribe to: Post Comments (Atom). View my complete profile. Hack You SPb 2016 - Reverse 300 writeup. Hack You SPb 2016 - Stegano 300 writeup. Hack You SPb 2016.