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I’m upgrading my site’s security and need a self-hosted image captcha that shows highly obfuscated alphanumeric characters—no external services such as reCAPTCHA, just pure server-side generation. The captcha must be complex: random character rotation, varied fonts and colours, curved lines, background noise, even slight warping so automated solvers struggle while humans still read it. Please build a small, clean module that I can drop into an existing PHP environment; if you prefer another language that runs easily on shared hosting, let me know. The code should let me set character length, timeout, and refresh behaviour from a simple config file. Deliverables • Source code with clear comments • One-page integration guide and demo form • Brief note on the libraries/extensions required and how to enable them I’ll test by integrating the demo on my staging server: the captcha image must render in under 200 ms, reject incorrect entries, and pass a quick OCR attempt with a failure rate above 95 %. If that sounds straightforward, I’m ready to get started right away.
Proje No: 40085307
33 teklifler
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33 freelancer bu proje için ortalama $25 USD/ saat teklif veriyor

Hi, Your need for a highly secure, self-hosted image captcha module with robust obfuscation and server-side generation shows you value both security and control without third-party dependencies. With my strong background in PHP development and security-focused web modules, I’m confident I can deliver a clean, lightweight captcha system tailored to your specs — including random rotations, varied fonts and colors, curved lines, background noise, and warping effects to foil automated solvers while remaining user-friendly. I’ll provide well-commented source code, an integration guide with a demo form, and clear instructions on required PHP extensions for easy deployment in your shared hosting environment. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Looking forward to implementing this next-level security feature swiftly and reliably for your site. Which PHP extensions and server capabilities does your current hosting support for image processing and performance optimization? Thanks, Asad
$25 USD 39 gün içinde
8,2
8,2

Hi there, I’ve read your requirement for a self-hosted, pure PHP/C++ image captcha module with heavy obfuscation and no external services. I’ll deliver a compact drop-in module you can drop into any PHP environment, with a config file to set character length, timeout, and refresh behavior. Deliverables: - Clean, commented source code - One-page integration guide and a live demo form - Brief notes on required libraries/extensions and how to enable them Approach: - Server-side rendering with PHP GD/Imagick; optional C++ speedup via a tiny PHP extension for shared hosting - Generate random alphanumeric strings; apply per-character rotation, varied fonts/colors, curved lines, background noise, and slight warp - Secure session-based validation, fast rendering (<200 ms) and anti-OCR measures - Config via INI file; easy to adjust length, timeout, refresh; standalone module for existing PHP apps Why I’m suited: - Strong PHP and image processing background; security-focused; practical, production-ready code - Experience delivering drop-in components with clear integration guides Next steps: - I can start with a PHP-only solution; if performance becomes critical, I’ll provide a C++-backed option - Target prototype in 2-3 days, with testing and docs Best regards,
$100 USD 1 gün içinde
6,6
6,6

Hello abdula061, We are Codenia Technologies LLP, with over 10 years of experience in Image Processing. We have carefully reviewed your requirement for a self-hosted image captcha with highly obfuscated alphanumeric characters and complex features. To achieve this, we propose to create a custom PHP module with random character rotation, varied fonts and colors, curved lines, background noise, and slight warping to deter automated solvers. The module will have a configurable file for character length, timeout, and refresh behavior. We would like to discuss the project further with you in chat to ensure we meet all your requirements and deliver a solution that enhances your site's security effectively. Thanks, Rupesh Kumar
$20 USD 40 gün içinde
5,1
5,1

I can build a fully self-hosted, server-side image CAPTCHA with highly obfuscated alphanumeric characters—using rotations, warping, noise, curves, and varied fonts/colors—without relying on any external services.
$15 USD 40 gün içinde
4,9
4,9

⚠️ If you're not happy, you don't pay ⚠️ Hello Abdula, I see you need a self-hosted image captcha that displays highly obfuscated alphanumeric characters for upgraded site security. I understand the importance of having a complex captcha to deter automated solvers while remaining readable for humans. I've built similar solutions for various industries, ensuring a fully functional and secure captcha system. I'll deliver a module that integrates seamlessly into your existing PHP environment, meeting your specific requirements for character length, timeout, and refresh behavior. Successfully delivered numerous similar projects with exceptional outcomes. Available to start immediately — first milestone ready in 48 hours. I'd love to discuss your vision. When works best for a quick 10-minute call? Worst case, you'll get free insights to guide your project. Looking forward to collaborating, Piyush PHP Developer | 5+ Years
$15 USD 30 gün içinde
4,7
4,7

Hi Abdula! I reviewed your project and specialize in creating secure server-side solutions. I’ll build a self-hosted image captcha that meets your requirements, featuring highly obfuscated characters and customizable settings via a config file. Let’s meet to discuss the details and get started! Best Regards, Amjad Iqbal
$18 USD 40 gün içinde
4,8
4,8

Hi, I understand your need for a self-hosted image captcha to enhance your site's security. With my recent experience developing complex image processing modules in PHP, I can create an efficient captcha that meets your specifications, featuring obfuscated alphanumeric characters, varied styles, and a robust design to thwart automated solvers while remaining user-friendly. I’ll ensure the module is clean, easy to integrate, and configurable as per your requirements. Let's establish a project timeline to start this right away;
$25 USD 32 gün içinde
4,6
4,6

Hi , I am professional web computer programmer with skills including JavaScript, Software Development, C++ Programming, PHP, Web Development, Image Processing and Security. Please contact me to discuss more about this project. Best Regards
$50 USD 34 gün içinde
4,1
4,1

Hello, Greetings , Good afternoon! Already have something live to show you I am an expert mobile programmer with skills including C++ Programming, Web Development, Image Processing, Software Development, Security, PHP and JavaScript. Please send a message to discuss more about this project. Many thanks
$50 USD 32 gün içinde
4,6
4,6

Hello, I hope you are doing well. I’m a developer with deep experience in PHP, image processing, and security, delivering self-hosted anti-bot tools. I’ll create a compact module that plugs into your PHP environment, generating complex, obfuscated image captchas entirely server-side with a simple config to adjust length, timeout, and refresh behavior. I’ve built similar CAPTCHA solutions using GD/Imagick, featuring random rotation, varied fonts and colors, curved lines, noise, and subtle warping—designed to defeat OCR while staying readable to humans. The package will include well-commented source, a one-page integration guide with a demo form, and notes on required libraries/extensions for easy setup. I can implement this with strong performance, aiming for sub-200 ms render, reliable validation, and a high OCR failure rate on tests. Delivered as a drop-in PHP module with clear config options. Please feel free to contact me so we can discuss more details. I am looking forward to the chance of working together. Best regards, Billy Bryan
$20 USD 36 gün içinde
4,0
4,0

Dear Abdula, I'm thrilled to take on the challenge of creating a complex image captcha for your upgraded site security. With my expertise in web development, I'm confident in delivering a high-quality, self-hosted captcha solution that meets your unique requirements. As a seasoned developer with extensive experience in PHP, I'm well-equipped to handle this project. My skills in image manipulation, random number generation, and font rendering will ensure that your captcha is complex and secure. I've successfully implemented similar projects in the past, including a custom captcha solution for a large e-commerce website. With multiple 5-star reviews on similar projects, I can assure you of a smooth, professional, and stress-free experience. I understand the importance of meeting the specific requirements outlined in your project description, including the use of a simple config file for setting character length, timeout, and refresh behaviour. I'm excited to get started on your project and deliver the following: * Source code with clear comments * One-page integration guide and demo form * Brief note on the libraries/extensions required and how to enable them I'll ensure that the captcha image renders in under 200 ms, rejects incorrect entries, and passes a quick OCR attempt with a failure rate above 95%. I'm ready to begin and would be happy to offer a free consultation to discuss the project further. The worst that can happen is you walk away with a free consultation. Let's get started and create a secure captcha solution for your site. Chris |
$25 USD 14 gün içinde
4,0
4,0

Hello, I can deliver a secure, self-hosted image CAPTCHA module designed to defeat automated solvers while staying readable for humans. No external services—pure server-side generation, fast, configurable, and drop-in ready. Rate: USD 25/hour Availability: 40 hrs/week ? Budget-First (Lean & Effective) Timeline: 3–4 business days Effort: ~12 hours Total Cost: USD 300 Milestones CAPTCHA engine (obfuscation, noise, rotation) – 40% Configurable controls (length, timeout, refresh) – 30% Demo form, validation, handover – 30% Ideal for quick security uplift with strict cost control. ? Premium (Hardened & Tuned) Timeline: 5–6 business days Effort: ~20 hours Total Cost: USD 500 Milestones Advanced distortion, multi-font/color logic – 35% Performance tuning (<200 ms render) + OCR resistance – 35% Integration guide, demo, QA – 30% Deliverables: commented source code (PHP or shared-hosting friendly alternative), demo form, one-page integration guide, and library/extension notes. Assurance: fast rendering, strict validation, >95% OCR failure target, clean config, full source ownership. If this fits, I can start immediately and lock the timeline. Thanks, Murtaza
$25 USD 40 gün içinde
3,7
3,7

Hello, As a skilled and experienced JavaScript developer with a relentless dedication to web performance and the ability to produce highly aesthetic websites with complex interactions, I am confident that I'm the right fit for your project. I understand the importance of robust security measures for websites and as such, I have honed my skills in building responsive, self-hosted solutions that ensure total control and independence. My expertise in web design, including HTML, CSS, and Javascript puts me in an excellent position to develop the captcha module you need. Additionally, with my proficiency in libraries like React and frameworks like Tailwind CSS and Bootstrap, I can create an intuitive user interface for easy configuration as you need. Finally, my deep understanding of web accessibility (A11Y) ensures that any interactive elements on your website correspondingly complemented by necessary text alternatives or modes support people with disabilities can effectively navigate your site while remaining secure. With me on your side, you can be confident that your updated security will be difficult for automated solvers but still manageable for humans visiting your site. Thanks!
$15 USD 17 gün içinde
2,8
2,8

Hello, As an experienced web developer specializing in creating efficient and secure systems, I am confident that I am the perfect fit for your project. Over the years, I have honed my skills to build scalable and interactive web applications - a proficiency I'm certain would significantly enhance your site's security. My core competencies, which include both front-end and back-end development using a wide range of modern technologies like JavaScript, TypeScript, React, Node.js and Python, align perfectly with the nature of your project. This depth of knowledge allows me to streamline and optimize both the performance and security of any given system. Additionally, my experience in API integration and third-party services is highly relevant for your project as I can ensure a smooth integration of the captcha module into your existing PHP environment. My commitment to clean code practices combined with my ability to improve user experiences will mean delivering excellent quality work. Partnering with me means welcoming automation bots, workflow automation capabilities into your system as well for other functions that may be useful for you. Thanks!
$50 USD 17 gün içinde
2,9
2,9

Hi, We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on PHP, JavaScript, C++ Programming, Software Development, Image Processing, Web Development, Security Lets connect in chat so that We discuss further. Regards
$20 USD 40 gün içinde
1,7
1,7

Hello. I understand your requirements, including building a fully self-hosted image CAPTCHA with heavily obfuscated alphanumeric characters, configurable complexity, fast server-side rendering, and no reliance on third-party services like reCAPTCHA. I am a full-stack developer and am proficient in PHP, web security, image processing, software development, and server-side web development. I also have experience generating dynamic CAPTCHA images using font randomization, rotation, noise layers, distortion/warping techniques, session-based validation, and performance-conscious rendering suitable for shared hosting environments. Based on my previous experience, I can suggest a lightweight PHP-based CAPTCHA module using native extensions that allows configurable character length, expiration, and refresh behavior while balancing human readability against OCR resistance. I am ready to start the project right away. Best Regards. John
$15 USD 40 gün içinde
2,2
2,2

Hi, I’ve just reviewed Create Complex Image Captcha and your requirements around web security enhancement. I’ve spent 13+ years as a Senior Software Architect building backend solutions with a focus on security and performance optimization. For your project, I would design a modular PHP solution that incorporates complex image captchas with random character rotation, varied fonts, and background noise. I will ensure it runs efficiently on shared hosting, delivering a captcha image in under 200 ms while exceeding your specified success criteria against OCR attempts. I’ll also provide a clean, documented codebase along with an integration guide, ensuring seamless implementation. If this aligns with what you’re looking for, I can start with a short technical discussion or a small milestone to validate the approach.
$50 USD 31 gün içinde
0,0
0,0

My skills and experience make me a strong match for your project. I understand you need a clean, professional, and user-friendly self-hosted image captcha module that generates highly obfuscated alphanumeric characters with random rotations, varied fonts, colors, curved lines, background noise, and slight warping to ensure a seamless defense against automated solvers. I specialize in PHP development and image processing techniques, including GD and Imagick libraries, enabling me to deliver an integrated, automated captcha system with configurable character length, timeout, and refresh behavior. While I am new to freelancer, I have tons of experience and have done other projects off site. I’d love the opportunity to discuss your project in more detail! Regards, Phillip De-Coning
$19 USD 14 gün içinde
0,0
0,0

Hello, I can build a fully self-hosted, server-side image CAPTCHA module designed specifically for high obfuscation and easy drop-in use with existing PHP applications. The CAPTCHA will generate randomized alphanumeric characters with rotation, multiple fonts, varied colours, curved interference lines, background noise, and subtle warping to defeat automated solvers while remaining human-readable. The module will be lightweight and optimized to render well under 200 ms, with a clean configuration file to control character length, expiration timeout, refresh behaviour, and difficulty level. Validation will be handled securely server-side with proper session/token handling to reject incorrect or expired entries. I will deliver well-commented source code, a demo form, and a concise integration guide, along with clear notes on required PHP extensions (such as GD or ImageMagick) and how to enable them on shared hosting. The design will be OCR-resistant (targeting >95% failure rate) while remaining simple to maintain and extend. I’m ready to start immediately and can adapt the solution if you prefer an alternative language that runs smoothly on shared hosting.
$15 USD 15 gün içinde
0,0
0,0

Hi there! Are you also looking for support for multiple languages or accessibility features like audio captcha, or just focused on the visual obfuscated characters? Regardless, this is definitely something that I feel confident delivering on, given my past experience. I would love to discuss your project further! Looking forward hearing from you. Kind Regards, Corné
$15 USD 14 gün içinde
0,0
0,0

Balikpapan, Indonesia
Ara 22, 2025 tarihinden bu yana üye
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