Privacy Policy
Version:2026-06-27
Effective date:2026-06-27
DOJ (the Company) establishes and publishes this Privacy Policy to protect users' personal information in accordance with applicable laws, including the Personal Information Protection Act.
1. Purposes of processing and information collected
The Company processes personal information for the following purposes.
| Purpose of processing | Information processed |
|---|---|
| Registration and login | Email address, handle (nickname), password (stored encrypted) |
| Discord account linking | Discord account identifiers |
| Service use | IP address, browser information (User-Agent), access logs |
| Online judging | Submitted code, judging results, problem-solving history |
| Contest operation | Contest participation records, results, ratings, rankings |
| Problem proposals and contributions | Problem proposal and contribution records |
The Company processes only the minimum personal information necessary to provide the service.
2. Use of personal information
The Company uses collected personal information for the following purposes.
- User identification and account management
- Login and user authentication
- Providing the online judging service
- Contest operation
- Providing ratings and rankings
- Operating problem proposal features
- Analyzing service usage statistics
- Preventing abuse and securing the service
- Improving the service
- Responding to inquiries and providing notices
3. Retention and deletion of personal information
The Company retains personal information until its processing purpose is fulfilled.
When a user closes their account, personal information is deleted without delay.
However, information may be retained to the extent necessary in the following cases.
- Where retention is required by applicable law
- Where needed to resolve disputes or protect rights
- Where needed to investigate abuse or security incidents
When the retention period ends or the processing purpose is fulfilled, personal information is securely deleted using methods that make recovery difficult.
4. Public information
Due to the nature of the service, the following information may be visible to other users.
- Handle (nickname)
- Profile
- Number of solved problems
- Rating
- Ranking
- Contest results
- Public submissions
- Problem contribution information
5. Sharing personal information
The Company does not provide users' personal information to third parties.
Exceptions apply in the following cases.
- Where the user gives separate consent
- Where disclosure is required by law
6. Outsourced processing and external services
The Company uses the following services to provide its service smoothly.
| Service | Purpose of use |
|---|---|
| Google Cloud | Service infrastructure operation |
| Discord OAuth | Discord login |
| Discord Bot | Discord integration features |
| Vercel Web Analytics | Service usage statistics |
Each service may process personal information under its provider's privacy policy.
7. International transfers of personal information
The Company may store or process personal information in Google Cloud's Singapore region (asia-southeast1).
8. Use of cookies
The Company may use cookies to keep users signed in and provide the service.
Users can refuse or delete cookies in their browser settings. Refusing cookies may limit access to some services.
Vercel Web Analytics may also be used to analyze service usage statistics.
9. Users' rights
Users may exercise the following rights regarding their personal information at any time.
- Access personal information
- Correct personal information
- Delete personal information
- Request suspension of processing
- Request account deletion
Requests to exercise these rights can be sent to the contact below. Some requests may be restricted under applicable law.
Contact
- Email:dadas08@naver.com
- Discord:https://discord.gg/MMSqvsA6vg
10. Measures to protect personal information
The Company takes the following measures to protect personal information.
- Secure encrypted storage of passwords
- Minimizing access to personal information
- Controlling server and network access
- Security checks and vulnerability management
- Secure deletion of personal information
11. Changes to this Privacy Policy
The Company may change this Privacy Policy in response to changes in applicable laws or the service.
Significant changes will be announced through service notices or similar means before they take effect.
This Privacy Policy takes effect on June 27, 2026.