Last updated: November 3, 2026.
This page explains which personal data Otakuchar collects, why, how long it is kept and what rights you have, under Vietnam’s Personal Data Protection Law No. 91/2025/QH15 and Decree 356/2025/ND-CP. It covers otakuchar.com, the games Linh Thẻ (cardbattle.otakuchar.com), Survival (survival.otakuchar.com), Circle Of Death (cod.otakuchar.com) and the Otakuchar Android app. The Vietnamese version of this policy is the reference version.
1. Who is responsible for your data
Otakuchar is a fan site run by the operator of otakuchar.com. Send any question or request about your personal data to: nhatanhkaitt@gmail.com.
2. Data we collect
When you only read pages or play without signing in: we don’t ask you for anything. The server keeps the usual technical logs (IP address, browser, page opened, time) to run and protect the site. Your light/dark choice and your mini game scores and progress are stored in your own browser (localStorage) and never sent to the server.
When you create an Otakuchar game account (one account for Linh Thẻ, Survival and Circle Of Death):
- Username, display name and avatar.
- Email, used only to send a password reset link if you forget your password.
- Password, stored as a one-way hash; nobody, including us, can read the original password.
- Game data: decks, settings, rank points, wins and losses, match history and replays, Survival and Circle Of Death progress.
- When you agreed to this policy and which version you agreed to.
- Your IP address at sign-up and on failed sign-ins, only to stop mass sign-ups and password guessing.
When you comment on otakuchar.com: your name, email, website (if given), comment, IP address and browser details. Your email is never shown publicly.
We collect no sensitive personal data, never ask for a phone number, ID documents or payment details, and nothing on the site can be bought with real money.
3. Why we use it
- To create and keep your account and save your progress so you can play on another device.
- To send a password reset email when you ask for one. We never send marketing email.
- To fight spam and cheating and keep the system safe.
- To show your comments.
We never sell or rent personal data and never use your data for advertising. The site has no Google Analytics, Facebook Pixel or any ad tracker.
4. Consent
Before creating an account or posting a comment you tick a consent box (it is never ticked for you). You can withdraw your consent at any time by deleting your account or emailing the address in section 1; withdrawing does not affect data lawfully processed before that.
If you are under 16, ask a parent or guardian to read this policy and agree with you before creating an account.
5. How long we keep data
- Accounts that never played a match are deleted after 30 days. Accounts not signed in for 365 days are deleted with all their data.
- Match history: the latest 100 matches of each account.
- IP addresses from sign-up and failed sign-ins: deleted after 24 hours. Sign-in sessions expire after 60 days without use. Password reset links expire after 60 minutes.
- Comments: kept until you ask us to delete them.
6. Where data is stored and third parties
Data is stored on servers rented from Hostinger (a web hosting service) and only the Otakuchar operator can access it. Password reset emails go through Hostinger’s mail server. Linh Thẻ loads fonts from Google Fonts, so Google receives your IP address when the fonts load. Apart from that we only share data with competent authorities when the law requires it.
Data travels over encrypted HTTPS connections. If a data breach happens, we will notify the authorities and affected users as required.
7. Your rights
You have the right to be informed, to access, correct, get a copy of and delete your data, to restrict or object to processing, to withdraw consent and to complain. How:
- Change your display name, avatar, email or password: in the Profile section of the Linh Thẻ game.
- Delete your account: in the Profile section of Linh Thẻ (needs your password); all progress and match history in every game is deleted straight away.
- Anything else (see or get a copy of your data, delete a comment, complain): email the address in section 1.
We confirm each request within 2 working days and handle it within the time limits of Decree 356/2025/ND-CP: at most 10 days to see, correct or provide data; 15 days to withdraw consent, restrict or object to processing; 20 days to delete.
8. Cookies
Otakuchar only uses necessary cookies, with no advertising or tracking cookies.
- Comments: when commenting you can choose to save your name, email and website in a cookie so you don’t have to type them again. It lasts 1 year and is only set if you tick the save box.
- Game accounts (Linh Thẻ, Survival, Circle Of Death): a sign-in cookie holding only a random session code, which expires after 60 days without use and is deleted when you sign out.
- Admin area (only for the site’s managers): WordPress sets sign-in cookies (2 days, or 14 days with “Remember me”), cookies for screen options and light/dark mode (1 year), a cookie marking devices that signed in, against password guessing (180 days), and a cookie that briefly keeps a post you just edited (1 day). Regular readers never get these cookies.
- Stored in your browser: light/dark mode, mini game scores and progress, and game progress while signed out are kept in browser storage (localStorage) and never sent to the server. The games also count players online with a random code not linked to any account, deleted after 1 hour.
9. Changes to this policy
When the policy changes we update the date at the top of the page. For important changes we will tell you in the games and ask for your consent again.
