The hottest Programming Substack posts right now

And their main takeaways
Category
Top Technology Topics

Chương trình chính thức của TetCon Saigon 2015

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 03 Jan 15
🕹 Technology Programming
  1. The TetCon Saigon 2015 event featured topics on web security, Bitcoin, and software vulnerabilities.
  2. Speakers discussed innovative projects and tools related to anonymous messaging, cryptocurrency, and reverse engineering.
  3. The event catered to a variety of interests, from earning money through security loopholes to analyzing malware targeting activists.

Javascript Crypto Is Useful

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 18 Jun 14
🕹 Technology Programming
  1. Javascript crypto can help solve problems, but can be tricky due to lack of types and permissive run-times. It's important to validate input, minimize type conversions, use typed arrays, and employ Google Closure for type checking.
  2. Javascript crypto has various useful applications like building crypto clients, avoiding PCI DSS scope for credit card processing, securing data against leaks, and reducing latency through code caching with digital signatures.
  3. Despite its challenges, programming crypto in Javascript is feasible and has gained support from notable organizations like Stanford, Google, Microsoft, and W3C.

Fairy tales in password hashing with scrypt

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 19 Apr 14
🕹 Technology Programming
  1. scrypt, a password-based key derivation function, is commonly used for password hashing but wasn't initially designed for this purpose
  2. Using scrypt incorrectly, such as with file encryption API instead of proper password hashing, can lead to weak security vulnerabilities
  3. When developing a crypto library, it's important to conduct user studies to ensure developers are using it correctly and securely

GDayX Vietnam 2013

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 31 Oct 13
🕹 Technology Programming
  1. The author will be speaking at the GDayX Vietnam 2013 event about interesting projects and their journey from a district to Google, offering insights and experiences to those interested in the tech field.
  2. The event will take place at Quang Trung Software Park this Saturday with a possibility of live streaming on YouTube, inviting everyone to attend.
  3. Sharing posts on social media platforms like Facebook and through email can help in spreading the word about events and discussions.
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A quick audit of CryptoCat's elliptic curve crypto

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 20 Oct 13
🕹 Technology Programming
  1. CryptoCat's engineering practices appear lacking due to minimal testing and mixing different cryptographic functions, risking security vulnerabilities.
  2. Writing secure crypto code in JavaScript is challenging due to its lack of type checks and bounds access issues detection, requiring thorough testing and careful data type handling.
  3. Specific issues were found in CryptoCat's elliptic curve crypto library, such as private key generation mistakes and incorrect signature verification, highlighting potential security risks.

Phép chia dài

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 23 Sep 13
🚌 Education Programming
  1. Estimating the first digit of the quotient in long division can help reduce the number of calculations needed.
  2. Understanding Knuth's Long Division algorithm can aid in efficiently performing arithmetic operations on large integers.
  3. Choosing a smart value for the base when dividing large numbers can lead to more accurate estimations and fewer operations required.

Hai tham luận "nặng ký" tại TetCon 2013

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 31 Oct 12
🕹 Technology Programming
  1. The cybersecurity community in Vietnam faces a challenge of limited local experts, with more managers than technical specialists.
  2. TetCon 2013 introduces foreign speakers presenting in English, highlighting the importance of staying updated with global cybersecurity trends.
  3. Quality submissions from international experts like Eduardo Vela and Bruce Dang bring valuable insights to TetCon, emphasizing the significance of practical cybersecurity topics.

Oakland 2011

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 22 May 11
🕹 Technology Programming
  1. The misuse of cryptography in web security, particularly in ASP.NET, can lead to severe vulnerabilities allowing attackers to compromise web applications.
  2. Researching and questioning the implementation of cryptographic techniques can lead to the discovery of new attack methods and security flaws.
  3. Utilizing cryptography correctly is crucial for security solutions, but it is challenging as there are numerous serious vulnerabilities, requiring more focus and research in the field.

How to recover RSA private key in a coredump of ssh-agent - Sapheads HackJam 2009 Challenge 6

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 24 Sep 09
🕹 Technology Programming
  1. Sapheads HackJam 2009 Challenge 6 involved recovering an RSA private key from a coredump of ssh-agent, showcasing real-world scenarios in CTFs
  2. The coredump contained data structures like RSA and BIGNUM that could be extracted to retrieve the private key for SSH access
  3. Understanding ASN.1 and using tools like pyasn1 were recommended for generating RSA private keys from parameters like n, d, e, p, and q

Cần tuyển nhân viên giám sát an toàn thông tin

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 30 Jul 09
💼 Business Programming
  1. The job posting is for hiring 2 information security monitoring officers at Dong A Bank in Ho Chi Minh City. Candidates with technical skills in programming, networking, and a passion for overcoming technical challenges are sought after.
  2. The position requires proficiency in various technical areas like discrete mathematics, computer architecture, programming languages, and network programming, with the opportunity for training and career development.
  3. The benefits of the job include competitive salaries based on experience, a friendly and technology-focused work environment that emphasises information security as vital to a company's success, and the chance for advancement and scholarships for further education.

Spot the vulnerability challenges

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 01 Mar 09
🕹 Technology Programming
  1. Some challenges in C programs can be difficult to solve if you don't understand how C stores and interprets integer values.
  2. The challenges shared remind of the importance of understanding C language issues, particularly related to the misuse of integers.
  3. Engaging in challenges like these can be a great way to enhance coding skills and understanding of vulnerabilities.

tweetsearch - twitter search engine using thrudb and django

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 22 Apr 08
🕹 Technology Programming
  1. Creating a Twitter search engine using Thrudb and Django was a successful venture that allowed for efficient query searches
  2. Thrudb, Django, and Python were praised for their capabilities in providing a strong technology platform for building innovative applications
  3. The tweetsearch project port from perl/cgi to python/django was possible thanks to late nights and a collaborative effort

baamboo

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 29 Mar 08
🕹 Technology Programming
  1. Baamboo, a popular music search engine, surprisingly uses SQL full text search instead of Lucene, a common choice for search engines.
  2. Lucene offers fast indexing and storage performance, making it a preferred option for companies looking for scalable solutions beyond traditional relational databases.
  3. Implementing Lucene and its sub-projects like Nutch and Solr can provide powerful search capabilities, but requires expertise and effort in customization and operation.

Port scanning in ActionScript 3.0 without DNS rebinding

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 08 Aug 07
🕹 Technology Programming
  1. In ActionScript 3.0, port scanning can be done without DNS rebinding by utilizing the SecurityErrorEvent.
  2. The SecurityErrorEvent in AS3 is thrown immediately when Flash Player tries to connect to a closed TCP port, allowing for potential identification of open ports within 2 seconds.
  3. Each probed port in ActionScript 3.0 uses a new Flash player instance to handle connections, sending only one policy-file request per player per host per port.

Zombilizing The Web Browsers Via Flash Player 9

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 03 Aug 07
🕹 Technology Programming
  1. Organizing events like VNSECON07 can be challenging, with speakers facing difficulties in engaging the audience due to lack of interpreters for deep technical topics.
  2. Preparing ahead by taking notes and bringing the necessary equipment like a laptop can enhance the learning experience during presentations.
  3. Including clear signage and directions can improve the overall event experience, making it easier for attendees to navigate different sessions and rooms.

Một phương pháp chống DDoS bằng xFlash

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 17 Jul 07
🕹 Technology Programming
  1. The way browsers handle HTML forms with enctype="multipart/form-data" and enctype="application/x-www-form-urlencoded" is different. This difference is key to detecting POST requests from Flash, which cannot send requests in the "multipart/form-data" format.
  2. By automatically setting all HTML forms to enctype="multipart/form-data" through a reverse proxy with an Apache output filter module, one can detect and protect against DDoS attacks from Flash.
  3. While this method can limit the impact of existing xFlash attacks, it may not be a permanent solution. Avoiding Flash altogether or focusing on overall DDoS defense strategies like infrastructure investment and system optimization is crucial.

Phân tích obfuscated Javascript

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 17 Jul 07
🕹 Technology Programming
  1. When analyzing obfuscated Javascript, splitting long code into shorter commands is essential for understanding the functionality.
  2. Variable names with subtle differences can reveal connections between code segments and help in unraveling the hidden code's purpose.
  3. Different color-coded groups of code may indicate distinct functionalities: blue for regular Javascript, green for encoded Javascript, and red for potentially meaningless or obfuscating code.

Hacker họ là ai vậy?

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 17 Jul 07
🕹 Technology Programming
  1. Hacker culture has specific characteristics like programming skills, tool knowledge, and a passion for music.
  2. Hackers are not limited to one specific type and can wear black, grey, blue, or white hats.
  3. Hacking involves a wide range of activities from financial crimes to stock trading, and hackers differ greatly in their skills and interests.

PHP "lên dĩa"

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 03 Mar 07
🕹 Technology Programming
  1. The Month of PHP Bugs in 2007 revealed several serious vulnerabilities in PHP, leading to concerns about security.
  2. The vulnerabilities included issues like XSS, local root vulnerabilities, Denial of Service vulnerabilities, and stack overflow vulnerabilities.
  3. These vulnerabilities highlight the importance of robust testing and security measures in PHP development.

Shellcode thần chưởng: luyện assembly

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 03 Mar 07
🕹 Technology Programming
  1. Shellcode depends on the operating system because it needs the OS's resources to function, just like any other software.
  2. Assembly language, while initially complex, is actually simple because it lacks abstract concepts and directly corresponds to machine code.
  3. Writing in Assembly can lead to significantly smaller executable sizes compared to higher-level languages like C, which is advantageous for creating compact shellcode.

PostgreSQL Asymmetric Join technique as a Further Evolution of Partitionwise Join

Conserving CPU's cycles ... • 0 implied HN points • 05 May 24
🕹 Technology Programming
  1. The Asymmetric Join (AJ) technique in PostgreSQL allows for more efficient parallel append operations by individually connecting each partition with a non-partitioned relation and merging results.
  2. One advantage of the Asymmetric Join technique is the independent choice of join strategy for each partition, leading to improved table scan filtering and reduced hash table sizes.
  3. Considerations for implementing the Asymmetric Join include growing search space for plans, restrictions on the inner and outer relations, and the necessity of checking partitioning schemes for different plain and partitioned relation combinations.

Devising Specific Notations

Paul’s Substack • 0 implied HN points • 08 Jul 24
🕹 Technology Programming
  1. Specific notations can be devised to solve programming problems effectively, and they don't always have to be text-based.
  2. Total decoupling and isolation, referred to as '0D', can help combat flatness in design by enabling layering.
  3. Tools like OhmJS and Ohm-editor can streamline the creation of new, specific notations in a short amount of time.

Towards Scheme to Python Transpilation

Paul’s Substack • 0 implied HN points • 05 Jul 24
🕹 Technology Programming
  1. Transpiling from a lower level language to a higher level language is harder than the reverse.
  2. Python poses challenges due to its higher level nature and restricted control structures compared to Scheme.
  3. Writing a transpiler is simpler than the reverse-engineering task involved in transpiling.

Good Enough

Paul’s Substack • 0 implied HN points • 04 Jul 24
🕹 Technology Programming
  1. Transpiling code between different languages can be challenging, especially when going from a low-level language like Scheme to a higher-level language like Python.
  2. Creating a higher-than-high-level language (HHLL) can help capture manual reverse-engineering processes and facilitate transpilation to different programming languages.
  3. Approaching complex coding tasks by manually writing scripts, creating grammars, and testing transpilers can help in achieving programming goals efficiently.

Computers Are Not Printing Presses

Paul’s Substack • 0 implied HN points • 04 Jul 24
🕹 Technology Programming
  1. Reading is a form of linear thinking in 2D with text arranged on paper.
  2. Computers offer a 4-dimensional medium for creation, with dimensions x, y, z, t.
  3. People don't necessarily need to know programming, just utilize the new 4D medium for various purposes like gaming, robotics, and ubiquitous computing power.

Subroutines Are Not Functions

Paul’s Substack • 0 implied HN points • 02 Jul 24
🕹 Technology Programming
  1. Subroutines are not functions designed to support functional paradigms, but rather to save code space at the cost of extra CPU cycles. They are non-reentrant and not thread safe.
  2. Physics teaches the technique of 'divide and conquer' using simplifying assumptions to focus on areas of interest, pushing aside unnecessary details.
  3. Different problems, involving time like video sequencing, robotics, gaming, etc., may benefit from using programming languages with paradigms other than the function-based one, like Prolog for relational paradigm.

Asynchrony - Little Networks

Paul’s Substack • 0 implied HN points • 28 Jun 24
🕹 Technology Programming
  1. Function-based, synchronous thinking can't handle true asynchronous operation, needing a new 'clutch' for desynchronization.
  2. Networking protocols between truly asynchronous nodes show promise with state machines and Statecharts.
  3. Program development should incorporate multiple paradigms while focusing on creating little networks that use queues for non-synchronous communication.

Structured Message Passing

Paul’s Substack • 0 implied HN points • 28 Jun 24
🕹 Technology Programming
  1. Structured message passing involves handling multiple inputs in a specific order.
  2. FIFO queues maintain the order of message arrival, unlike LIFO strategies used in recursion.
  3. FIFO queues and dispatchers enable true asynchrony, which is different from function-based synchronous thinking.

Routing 101 Part 1

Paul’s Substack • 0 implied HN points • 27 Jun 24
🕹 Technology Programming
  1. Routing involves sending messages between components like parent and child containers.
  2. Basic routing includes sending messages down from parent to child, across between children, and up from child to parent.
  3. Consider factors like multiple output messages, multiple inputs and outputs, and different routing scenarios when designing a routing system.