Basics

Why is it free?

Non-profit organization PAPS operates a hotline and counseling support service for victims of sexual exploitation and digital sexual violence. PAPS developed the system because it was necessary to share evidence preservation information with lawyers, clients, and law enforcement agencies, and to ensure the security of the system, including preventing the misuse of private URLs.

Currently, PAPS also use the system for our outreach, advocacy, publicity, and awareness activities, which is why it’s freely available to the general public.

What is sexual exploitation and digital sexual violence?

Sexual exploitation involves exploiting the vulnerability, power dynamics, and trust of others for sexual purposes, often for financial, social, or political gain. This includes activities such as sex trafficking, child pornography, adult video performances, and any form of sexual coercion.

Digital sexual violence refers to instances where individuals are victimized using digital technologies such as smartphones and the internet. Examples include being filmed or photographed without consent, having these materials distributed on social media or adult websites without permission, and suffering consequences in real life due to illegal dissemination.

For more information, please visit PAPS website.

Mechanism of shortened URLs

Shortened URLs typically work through redirection. When a shortened URL is clicked, the browser sends a request to the server hosting the shortened URL (in this case, https://ur0.jp). The server then identifies the original long URL and instructs the browser to redirect to it.

The process is as follows:

1. The user clicks the shortened URL, and the browser sends a request to that URL.
2. The server hosting the shortened URL receives the request and identifies the original long URL.
3. The server sends an HTTP response (usually HTTP status code 301 or 302) instructing the browser to redirect to the original long URL.
4. The browser follows this redirect and sends a new request to the original long URL.
5. The content of the original long URL is displayed in the browser.

This process allows users to be temporarily redirected to the server providing the shortened URL service before being redirected to the original long URL’s page.

Why shorten URLs with HTTPS?

The primary reason for shortening URLs using HTTPS is to ensure security for users when using the links. Selecting a URL shortening tool equipped with HTTPS security (SSL/TLS) enhances the reliability of link usage. This ensures that the link inputted is securely transmitted to the ur0.jp server, with communication between the browser and server encrypted via SSL/TLS. Even if attackers gain some level of access to the communication, they would only see encrypted data that is indecipherable.

Benefits of using ur0.jp:

• Shortens the length of links, reducing the number of characters.
• No cumbersome registration required. Simply input the URL and press the “Shorten” button to use it easily and quickly.
• ur0.jp provides a completely free service.
• ur0.jp uses HTTPS, so the resulting links also include HTTPS, providing secure links.
• Allows the use of short links on social media platforms such as SNS.
• When creating advertising campaigns on platforms like Google Ads or Facebook Ads, using a URL shortening tool allows for reduction in character count, enabling more effective utilization of space to adequately explain the content being promoted. Using shortened URLs also enhances the aesthetic appeal of displaying URLs.