Skip to main content

Security Directory

Explore comprehensive security analyses from websites around the world. Filter by industry, location, risk level, and more.

Live Guard activity

Security teams are checking their sites with Guard right now

Run your domain before the queue fills up

149319
Websites
130
Industries
113
Countries
52
Avg Score
Page 63 of 143|Showing 3101-3150 of 7129
1api.net favicon

1API GmbH

1api.net

68
TechnologyGermanymediumMEDIUM

1API GmbH is a well-established European domain registrar and developer of domain name platforms, operating since 2006 and managing over 3 million domains. The company targets domain registrants, resellers, and businesses requiring domain registration and management services. Their business model includes direct domain registration and reseller partnerships, positioning them as a leading player in the European domain registration market. The website reflects this professional positioning with clear branding and relevant content. Technically, the website uses modern web technologies such as Bootstrap, jQuery, FontAwesome, and Google Tag Manager. It is mobile-optimized and provides a good user experience with clear navigation. However, some technical improvements are possible, including enabling DNSSEC, adding security headers, and implementing cookie consent mechanisms to enhance privacy compliance. From a security perspective, the site enforces HTTPS and uses domain status locks to prevent unauthorized transfers. The presence of an abuse warning notice indicates awareness of phishing risks. However, the absence of security headers and DNSSEC reduces the overall security posture. No critical vulnerabilities or exposed sensitive data were detected. Overall, the website is trustworthy and professional with a solid business foundation. Strategic improvements in security headers, DNSSEC, and privacy compliance would further strengthen their security and compliance posture.

65
68
12
65
75
80
100
domainregistraricanndomainmanagementresellertechnology
BootstrapjQueryFontAwesomeGoogle Tag Manager

Partner Domains:

onlydomains.com
partner
hexonet.net
partner

+1 more partners

2025-09-06T21:35:16.956Z
confidentialcomputing.io favicon

The Linux Foundation

confidentialcomputing.io

64
TechnologyUnited StateslargeMEDIUM

The Confidential Computing Consortium website is a professionally designed platform hosted by The Linux Foundation, focusing on advancing confidential computing technologies. The consortium serves as an industry collaboration hub, promoting hardware-based trusted execution environments and related security technologies. The website targets technology companies, developers, and security professionals interested in confidential computing. The business model is that of a consortium facilitating standards development and community building. Technically, the website is built on WordPress with integrations of HubSpot for marketing and analytics, Google Tag Manager, and New Relic for performance monitoring. The site uses modern web technologies and is mobile optimized, though accessibility features are basic. Performance is moderate, with room for improvement in SEO and accessibility. From a security perspective, the site uses HTTPS and has domain transfer protections in place. However, DNSSEC is not enabled, and no explicit security headers were detected in the provided data. There is no visible security policy, incident response information, or vulnerability disclosure program, which are areas for improvement. The domain WHOIS data is consistent and transparent, registered to The Linux Foundation, matching the website's claims. Overall, the website presents a trustworthy and credible front for the consortium but would benefit from enhanced privacy compliance, explicit security policies, and improved security headers to strengthen its security posture and user trust.

25
68
17
60
85
75
100
confidentialcomputinglinuxfoundationtechnologyconsortiumsecurityindustrycollaboration
WordPressHubSpot (analytics, messaging, ads pixel)Google Tag ManagerNew Relic Browser monitoring+2
2025-09-06T16:59:52.436Z
xcbtc.com favicon

xcBTC

xcbtc.com

48
FinanceN/asmallHIGH

xcBTC is a specialized financial technology project focused on tokenizing Bitcoin across multiple blockchains such as Etherlink, Ethereum, and Tezos. It offers a decentralized, transparent, and compliant solution that enables Bitcoin to be used with smart contracts and blockchain applications. The governance model involves distributed Keyholders managing multi-signature wallets and Gatekeepers handling KYC/AML compliance and user interactions. The project positions itself as a cost-effective and secure bridge between Bitcoin and other blockchain ecosystems, targeting cryptocurrency users, developers, and regulated financial entities. Technically, the website is built on WordPress using the Impreza theme, leveraging modern web technologies including Google Analytics and Tag Manager for tracking. The site is well-structured, mobile-optimized, and includes transparency features such as public BTC custody addresses and links to security audits. However, some security best practices like HTTP security headers and a formal security policy are not explicitly present. From a security perspective, the site enforces HTTPS and avoids exposing sensitive data. The governance model's use of multi-signature wallets and regulated operators adds trustworthiness. No critical vulnerabilities or WAF blocking were detected. Privacy compliance is supported by a clear privacy policy and cookie consent mechanism, though incident response contacts and vulnerability disclosure mechanisms are absent. Overall, xcBTC demonstrates a mature and professional online presence with strong business credibility and technical implementation. Strategic improvements in security headers, incident response transparency, and accessibility could further enhance trust and compliance.

15
68
2
70
72
75
-
bitcoinblockchaintokenizationfinancecryptocurrency+4 more
WordPressGoogle AnalyticsGoogle Tag ManagerjQuery+3

Partner Domains:

lexr.com
partner
mtpelerin.com
partner

+3 more partners

2025-09-06T16:54:20.885Z
osc.gov favicon

U.S. Office of Special Counsel

osc.gov

70
GovernmentUnited StatesmediumMEDIUM

The U.S. Office of Special Counsel (OSC) is a federal government agency dedicated to protecting whistleblowers and enforcing federal personnel laws such as the Hatch Act and USERRA. The agency provides services including complaint filing, investigations, outreach, training, and alternative dispute resolution. The website serves as an official portal for information, resources, and filing complaints related to prohibited personnel practices and wrongdoing disclosures. It targets federal employees, whistleblowers, and government stakeholders. Technically, the website is built on Microsoft SharePoint, leveraging modern web technologies including jQuery and FontAwesome, with embedded YouTube videos and integration with government analytics platforms. The site is well-structured, mobile-optimized, and accessible, reflecting a mature digital infrastructure consistent with government standards. From a security perspective, the site enforces HTTPS, uses a .gov domain with transfer protection, and avoids exposing sensitive data. However, it lacks DNSSEC and does not publish explicit security or incident response policies. Privacy compliance is basic, with no cookie consent mechanism detected. Analytics usage is moderate and transparent, consistent with government norms. Overall, the OSC website is a trustworthy and professional government resource with good content quality and technical implementation. Strategic improvements include enabling DNSSEC, publishing security and incident response policies, and implementing cookie consent to enhance privacy compliance and user trust.

65
58
17
85
72
80
100
governmentwhistleblowercompliancefederalpersonnelpractices+4 more
Microsoft SharePointjQuery 3.7.1FontAwesomeYouTube embedded videos+2
2025-09-06T16:53:04.957Z
oddiyana.ventures favicon

Oddiyana Ventures

oddiyana.ventures

60
TechnologyN/asmallMEDIUM

Oddiyana Ventures is a specialized blockchain venture capital firm focusing on early-stage investments and advisory services for innovative blockchain startups. The company positions itself as a bridge between emerging blockchain projects and venture capital, emphasizing growth acceleration and expert advisory. The website content reflects a professional and consistent brand image with a clear focus on blockchain technology investments and partnerships with notable projects and platforms. Technically, the website is built on WordPress using Elementor, with modern libraries such as Swiper.js and FontAwesome. The site is mobile optimized and performs moderately well, though there is room for improvement in accessibility and SEO. Security posture is good with HTTPS enabled and no obvious vulnerabilities, but lacks some security headers and formal privacy and cookie policies. Overall, the security posture is solid but could benefit from enhanced compliance documentation and incident response information. The domain WHOIS data is privacy protected, which is common in this sector, and the website content aligns well with the claimed business, indicating moderate trustworthiness. Strategic recommendations include adding privacy and cookie policies, improving security headers, and providing clear contact information to enhance trust and compliance.

60
50
2
70
47
75
100
blockchainventurecapitalinvestmentcryptostartups+1 more
WordPressElementorSwiper.jsjQuery+2

Partner Domains:

medium.com
partner
worldlibertyfinancial.com
partner

+3 more partners

2025-09-06T14:40:55.436Z
nhnacademy.com favicon

NHN Academy

nhnacademy.com

62
EducationN/asmallMEDIUM

NHN Academy is an educational institution focused on providing specialized software training, particularly in Backend development and AIoT technologies. The website presents a professional and consistent brand image, targeting software professionals and learners primarily in Korea. The business model centers on mentorship and skill development in software technologies, positioning itself as a regional training academy. Technically, the website is built using modern static site generation technologies including Hugo and Wowchemy, hosted on GitHub Pages. It employs Google Tag Manager for analytics and uses modern web fonts and CSS frameworks. The site is mobile optimized and performs well, though accessibility features are basic. From a security perspective, the site uses HTTPS but lacks important security headers and formal privacy or cookie policies. No contact information or incident response details are provided, which limits transparency and user trust. No vulnerabilities or exposed sensitive data were detected, but improvements in security headers and compliance documentation are recommended. Overall, the website is safe, professional, and functional with moderate risk due to missing privacy and security policy disclosures. Strategic enhancements in compliance and security posture would improve trust and user confidence.

30
35
2
70
100
80
100
educationsoftwaretrainingbackendaiotmentorship+3 more
HTML5CSS3JavaScriptGoogle Fonts (JetBrains Mono)+4
2025-09-06T13:31:19.984Z
kyber.network favicon

Kyber Network

kyber.network

73
TechnologyN/alargeMEDIUM

Kyber Network is a leading decentralized finance (DeFi) liquidity hub that aggregates crypto liquidity across multiple blockchains to provide users and decentralized applications with the best token swap rates. The platform supports over 20,000 tokens and integrates with more than 100 DApps, positioning itself as a critical infrastructure component in the DeFi ecosystem. KyberDAO enables governance by KNC token holders, allowing community-driven protocol evolution and rewards distribution. The website is professionally designed, mobile-optimized, and rich in content, reflecting a mature and well-established project in the blockchain space. Technically, the site leverages modern JavaScript frameworks such as Vue.js and integrates multiple analytics and tracking tools including Google Analytics, Mixpanel, and Facebook Pixel. It supports multi-chain DeFi platforms and uses audited smart contracts, demonstrating a strong technical foundation. Performance and SEO optimizations are evident, and the site provides extensive resources for traders, liquidity providers, developers, and governance participants. From a security perspective, the website enforces HTTPS, employs standard security headers, and references third-party audits and insurance partnerships, indicating a robust security posture. However, explicit privacy, cookie, and incident response policies are not clearly presented, which could be improved to enhance compliance and user trust. No critical vulnerabilities or exposed sensitive data were detected. Overall, Kyber Network presents a trustworthy and professional DeFi platform with strong market positioning and technical maturity. Strategic improvements in privacy transparency and security communication would further strengthen its compliance and user confidence.

90
35
35
85
75
80
100
defiliquiditycryptoblockchaintokenswap+3 more
Vue.jsjQueryFontAwesomeSwiper.js+4

Partner Domains:

kyberswap.com
partner
kyber.org
partner

+2 more partners

2025-09-06T12:22:36.187Z
ovcttac.gov favicon

Office for Victims of Crime Training and Technical Assistance Center

ovcttac.gov

73
GovernmentUnited StateslargeMEDIUM

The Office for Victims of Crime Training and Technical Assistance Center (OVC TTAC) operates as a U.S. government entity under the Department of Justice, providing comprehensive training, resources, and technical assistance to victim assistance organizations nationwide. The website serves as an authoritative platform offering free educational materials, webinars, and specialized programs such as the National Victim Assistance Academy. Its target audience includes victim service professionals and allied organizations seeking to enhance their capabilities in supporting crime victims. Technically, the website employs a modern technology stack including jQuery, Bootstrap, Google Analytics, and a CMS identified as Mura. The site is mobile-optimized, accessible, and demonstrates good SEO practices. Performance is moderate with well-structured navigation and professional design. Security posture is strong with HTTPS enforced and no visible vulnerabilities, though security headers could be improved. From a security and compliance perspective, the site lacks a visible cookie consent mechanism and explicit incident response contacts, which are areas for enhancement. The WHOIS data is unavailable due to privacy or registry restrictions, but the .gov domain and official DOJ branding strongly support legitimacy. No adult or questionable content is present, making the site safe for general audiences. Overall, the website is a trustworthy, professional government resource with strong business credibility and technical implementation. Strategic improvements in privacy compliance and security headers would further enhance its posture.

80
53
17
70
100
80
100
victimassistancetraininggovernmentjusticeresources+2 more
jQueryBootstrap 5.3.7Google AnalyticsGoogle Tag Manager+4
2025-09-06T12:18:39.023Z
seedprod.com favicon

SeedProd

seedprod.com

69
TechnologyN/amediumMEDIUM

SeedProd is a well-established WordPress plugin company specializing in drag & drop website and landing page builders, boasting over 1 million users. Their product suite includes theme building, landing pages, WooCommerce templates, and maintenance mode pages, targeting business owners, marketers, and developers seeking fast, no-code website solutions. The company has a strong market position supported by professional branding, extensive testimonials, and partnerships with recognized entities like WPBeginner and Awesome Motive. Technically, the website is built on WordPress with modern JavaScript libraries, SEO optimizations, and integrations with marketing and analytics tools such as Google Analytics, Microsoft Clarity, and OptinMonster. The site is mobile-optimized, fast, and accessible, reflecting a mature digital infrastructure. Security posture is solid with HTTPS enforced and spam protection via ReCaptcha, though some HTTP security headers could be improved. Privacy compliance is good with a comprehensive privacy policy and terms of service, but lacks a visible cookie consent mechanism. WHOIS data is unavailable or privacy protected, which slightly reduces domain trustworthiness, but overall business credibility remains high due to external trust signals and professional presentation. Strategic recommendations include enhancing HTTP security headers, implementing explicit cookie consent, and verifying domain registration details to improve trust and compliance.

50
53
25
85
75
85
100
wordpresslandingpagebuilderthemebuildersaasmarketing+3 more
WordPressPHPJavaScriptjQuery+8

Partner Domains:

awesomemotive.com
partner
wpbeginner.com
partner

+2 more partners

2025-09-06T12:17:03.219Z
elementary.io favicon

elementary, Inc.

elementary.io

65
TechnologyUnited KingdommediumMEDIUM

elementary, Inc. operates elementary.io, a professional and well-established website promoting elementary OS, an open source, privacy-respecting alternative operating system to Windows and macOS. The company targets general computer users, developers, and privacy-conscious individuals with a pay-what-you-can business model for OS downloads and an app store for indie developers. The website is well-branded, consistent, and provides comprehensive information about the OS and its features, emphasizing ethical computing and user privacy. Technically, the website uses modern web technologies including JavaScript, jQuery, FontAwesome, and is hosted behind Cloudflare DNS. The site is fast, mobile-optimized, and accessible with good SEO practices. Analytics are implemented via plausible.io, a privacy-focused service, but no cookie consent mechanism is present. The site lacks explicit terms of service and published security or incident response policies. Security posture is strong with HTTPS enforced and domain registration consistent and transparent. However, DNSSEC is not enabled and security headers are not explicitly detected. No vulnerabilities or exposed sensitive data were found. The site respects privacy principles and does not collect sensitive personal data beyond minimal analytics. Overall, elementary.io presents a trustworthy, professional, and secure online presence for elementary OS. Strategic improvements include adding cookie consent, publishing terms of service and security policies, and enabling DNSSEC to enhance domain security.

55
53
2
75
75
75
100
opensourcelinuxoperatingsystemprivacyethicalsoftware+2 more
JavaScriptjQueryFontAwesomeCloudflare DNS
2025-09-06T12:16:28.120Z
V

VanEck Australia Pty Ltd.

vaneck.com.au

64
FinanceAustralialargeMEDIUM

VanEck Australia Pty Ltd. operates a professional and comprehensive website focused on providing exchange-traded funds (ETFs) and investment solutions tailored for Australian investors, including financial advisers, retail, institutional, and SMSF investors. The company leverages 70 years of global investment expertise to offer smart beta, active, and market cap strategies. The website reflects a mature digital presence with strong branding consistency and clear navigation, supporting a wide range of investor types and providing extensive educational and fund-related resources. Technically, the website employs modern web technologies including React, Google Tag Manager, Marketo, and Microsoft Application Insights, indicating a robust infrastructure for analytics and marketing. The site is mobile-optimized, accessible, and SEO-friendly, with structured data enhancing search engine understanding. The use of EPiServer CMS suggests a professional content management environment. From a security perspective, the site enforces HTTPS and integrates monitoring tools but lacks explicit security policy disclosures and incident response contacts. No critical vulnerabilities or exposed sensitive data were detected. Privacy compliance is supported by the presence of privacy and cookie policies with consent mechanisms, though GDPR-specific details are inferred rather than explicit. WHOIS data is unavailable due to privacy restrictions, which is common for financial services entities. Overall, VanEck Australia presents a trustworthy and professional online presence with strong business credibility and technical maturity. Strategic recommendations include enhancing security header implementation, publishing a formal security policy and incident response contacts, and considering a vulnerability disclosure program to further strengthen trust and compliance.

20
58
17
85
75
70
100
financeetfinvestmentaustraliafinancialadviser+2 more
JavaScriptjQueryGoogle Tag ManagerGoogle Analytics+4
2025-09-06T10:00:54.195Z
fbi.gov favicon

Federal Bureau of Investigation

fbi.gov

68
GovernmentUnited StatesenterpriseMEDIUM

The Federal Bureau of Investigation (FBI) operates as the primary federal investigative and law enforcement agency in the United States, focusing on protecting the American people and upholding the Constitution. The website serves a broad audience including the general public, law enforcement, victims, students, and businesses by providing investigative information, crime statistics, and public safety resources. The FBI maintains a strong market position as a government entity under the Department of Justice, with a clear mission and authoritative content. Technically, the website is built on a modern and robust infrastructure using Plone CMS and CastleCMS, enhanced with Bootstrap and FontAwesome for responsive design. It employs Google Analytics and DigitalGov analytics for user tracking, though it lacks a visible cookie consent mechanism. The site is well-optimized for mobile devices and accessibility, with fast performance and clear navigation. From a security perspective, the site enforces HTTPS and follows several best practices, including secure forms and no exposed sensitive data. However, explicit security headers like Content-Security-Policy and X-Frame-Options are not visibly implemented, and there is no public incident response or vulnerability disclosure page. The WHOIS data is privacy protected or unavailable, which is justified given the high-profile nature of the domain. Overall, the site demonstrates a strong security posture with minor areas for improvement. The overall risk assessment is low, with recommendations to enhance privacy compliance by adding cookie consent, improve security headers, and publish incident response information. These steps will further strengthen trust and compliance with modern standards.

70
53
2
70
75
85
100
governmentlawenforcementsecurityfbipublicsafety+2 more
Bootstrap 5FontAwesomeGoogle Tag ManagerCastleCMS 3.1.0b7+3

Partner Domains:

delivery.fbi.gov
partner
fbijobs.gov
partner

+3 more partners

2025-09-06T09:58:50.950Z
inkglobalfoundation.org favicon

INK Global Foundation

inkglobalfoundation.org

35
Non-profitN/amediumHIGH

INK Global Foundation is a well-established non-profit organization focused on fostering innovation, leadership, and storytelling through its flagship programs such as INK Fellows, INK Women, and Writers INK. The foundation targets a global audience of changemakers, entrepreneurs, women leaders, and creative writers, providing mentorship, learning opportunities, and platforms for impact. The website reflects a professional and consistent brand image with active social media engagement and partner collaborations. Technically, the website is built on WordPress with modern front-end libraries like jQuery, FontAwesome, and slick carousel plugins. It demonstrates good mobile responsiveness and SEO optimization, although performance is moderate. The site uses HTTPS with an excellent SSL configuration but lacks some security headers and published security policies. From a security perspective, the site shows a mature posture with secure forms and no visible vulnerabilities or exposed sensitive data. However, it lacks published privacy and cookie policies, incident response, and vulnerability disclosure information, which are important for compliance and trust. The WHOIS data is unavailable, likely due to privacy protection, but the website content and external references support legitimacy. Overall, the site is trustworthy and professionally managed but would benefit from enhanced privacy compliance and security transparency to improve user trust and regulatory adherence.

30
35
2
60
-
75
-
non-profitinnovationleadershipstorytellingwomenempowerment+1 more
jQueryFontAwesomeSlick CarouselOwl Carousel+2

Partner Domains:

ink-fellows.org
partner
inkwomen.org
partner

+3 more partners

2025-09-06T04:18:23.839Z
dressforsuccess.org favicon

Dress for Success Worldwide

dressforsuccess.org

71
Non-profitUnited StateslargeMEDIUM

Dress for Success Worldwide is a well-established international non-profit organization founded in 1997, dedicated to empowering unemployed women by providing professional attire, support networks, and development tools to achieve economic independence. The organization operates through a large network of 130 offices across 15 countries, positioning itself as a leader in women's economic empowerment globally. Their website reflects a professional and consistent brand image with clear mission statements and accessible navigation, targeting women seeking economic mobility. Technically, the website is built on WordPress, utilizing modern technologies such as jQuery, Google Maps API, and Blackbaud donation forms. Hosting and DNS services are managed via Cloudflare, ensuring good performance and security. The site is mobile-optimized and includes accessibility features, although these could be enhanced further. SEO practices are adequately implemented with proper meta tags and structured data. From a security perspective, the site enforces HTTPS and employs security best practices like clientTransferProhibited domain status and Cloudflare DNS. However, DNSSEC is not enabled, and there is no publicly available security policy or incident response contact information. Cookie consent mechanisms are absent, which may impact GDPR compliance. No vulnerabilities or suspicious activities were detected in the content or technical setup. Overall, the website demonstrates a strong business credibility and trustworthiness with a good security posture, though improvements in privacy compliance and explicit security policies are recommended. The domain's long history and consistent WHOIS data further reinforce the legitimacy of the organization.

85
65
17
80
65
75
100
non-profitwomenempowermentcharityprofessionalattireeconomicindependence
WordPressjQueryGoogle Maps APIEvents Manager plugin+2

Partner Domains:

blackbaudcdn.net
partner
2025-09-05T22:33:31.456Z
cometbft.com favicon

CometBFT

cometbft.com

54
TechnologyN/asmallMEDIUM

CometBFT is a technology-focused project delivering a consensus engine tailored for the Cosmos blockchain ecosystem. The website serves as an informational and documentation portal, targeting blockchain developers and ecosystem participants. It is stewarded by Informal Systems, lending credibility and organizational backing. The site is built using modern web technologies such as Next.js and React, providing a good user experience with responsive design and clear navigation. However, it lacks explicit privacy, cookie, and terms of service policies, as well as direct contact information, which limits its compliance posture. From a technical perspective, the website employs a modern frontend stack and loads external resources efficiently, but there is no evidence of advanced security headers or DNSSEC implementation. The domain registration is consistent with the project's timeline and uses a reputable registrar without privacy protection, supporting legitimacy. Social media presence is active on GitHub, Telegram, Twitter, and Discord, facilitating community engagement. Security posture is moderate; HTTPS is implied by the URL, but the absence of security headers and formal security policies reduces the overall security maturity. No forms or data collection mechanisms are present on the homepage, minimizing exposure to input-based vulnerabilities. No vulnerability disclosure or incident response information is provided, which could be improved to enhance trust. Overall, the website is professional and safe, with a clear focus on technology and community engagement. Strategic improvements in privacy compliance, security policies, and contact transparency would strengthen the site's trustworthiness and compliance standing.

30
35
2
70
52
70
100
blockchainconsensuscosmostechnologyopensource
ReactNext.jsFontAwesomeGoogle Fonts

Partner Domains:

informal.systems
partner
2025-09-05T21:22:33.046Z
adstandards.com favicon

Advertising Standards Canada

adstandards.com

56
MediaCanadamediumMEDIUM

Advertising Standards Canada operates as a non-profit organization dedicated to administering and enforcing the Canadian Code of Advertising Standards. It serves as the authoritative body for advertising compliance in Canada, providing complaint handling, preclearance services, and educational resources to the advertising industry and consumers. The organization is well-established with a domain age of over 20 years and is supported by leading Canadian organizations. The website reflects a professional and consistent brand image with clear navigation and relevant content targeting advertising professionals and consumers interested in advertising standards. Technically, the website is built on WordPress with a modern tech stack including jQuery and SiteOrigin widgets, hosted on Cogent Communications infrastructure. Performance and mobile optimization are good, with accessibility and SEO features implemented adequately. Security posture is solid with HTTPS enforced and domain transfer protections in place, though improvements can be made by enabling DNSSEC and adding security headers. Privacy compliance is basic, with a privacy policy present but lacking a cookie consent mechanism despite Google Analytics usage. Overall, the website is trustworthy and credible, with room for enhancements in security and privacy transparency.

15
53
2
60
62
75
100
advertisingstandardscanadacompliancenon-profit+1 more
WordPressjQueryGoogle AnalyticsSiteOrigin Panels+2
2025-09-05T19:05:03.244Z