利用規約 - Ghost Message

1. サービスの説明

Ghost Message is a zero-knowledge secure messaging platform that enables users to share encrypted messages through self-destructing links. All encryption happens exclusively in the user's browser. We have no ability to access, view, or recover the original content of any message shared through our service.

2. ゼロ知識アーキテクチャ

Client-Side Encryption: All messages are encrypted in your browser before being transmitted to our servers
No Access to Content: We have no technical ability to access, read, or decrypt messages
No Access to Encryption Keys: Encryption keys are never transmitted to or stored on our servers
No Content Moderation Capability: Due to our zero-knowledge design, we cannot monitor, screen, or moderate message content

3. ユーザー適格性

Users must comply with all applicable local laws regarding minimum age requirements
No account creation is required to use Ghost Message
Authentication is required only for accessing administrative features

4. 限定されたデータ収集

We collect and store only the following information:

Encrypted message content (temporarily, until viewed or expired)
Message expiration time
View count limitations
IP addresses (temporarily, only for rate limiting purposes)

No personal information is required to use the service. We do not know who sends or receives messages, nor can we access the content of messages.

5. 許容される利用

Users agree not to use Ghost Message for any purpose that:

Violates applicable laws or regulations
Infringes on the rights of others
Distributes malicious software
Attempts to circumvent the security or functionality of the service
Exceeds rate limits (currently 30 secrets per 15 minutes per IP address)

6. コンテンツに対するユーザーの責任

Users are solely responsible for the content they share through Ghost Message
Due to our zero-knowledge architecture, we cannot monitor or control the content shared
Users must comply with all applicable laws regarding the content they share
Users assume all liability for messages they create and share

7. プライバシーとデータ保護

No Knowledge of Personal Data: We have no knowledge of whether personal data is contained in encrypted messages
No Processing of Message Content: We technically cannot process, access, or analyze encrypted message content
Minimal Processing: The only processing we perform is storing encrypted data until deletion and collecting anonymous usage statistics
No Data Sharing: We do not share any data with third parties except as required by law
Automatic Deletion: Messages are automatically deleted once viewed (up to the maximum view count) or expired

8. データ主体の権利

For the limited data we do collect:

We comply with data access, correction, and deletion rights where technically possible
Due to our encryption model, we cannot search for, access, or modify the content of encrypted messages
Once a message is deleted (after viewing or expiration), we retain no record of it

9. サービスの制限

Messages are automatically deleted after being viewed the maximum number of times or when they expire
If the encryption key is lost, the message cannot be recovered by anyone, including us
The "burn" feature allows creators to manually destroy a secret before it's viewed or expires, but this feature is session-specific and password-protected; if you refresh or leave the page after creating a secret, you'll lose the ability to burn it
We provide no guarantee of service availability or uptime
We provide no warranty regarding the security of messages beyond our described security model

10. 法的遵守に関する技術的制限

Due to our technical architecture, we cannot:

Monitor message content for illegal activity
Filter or screen content
Report on message content to authorities
Provide message content in response to legal requests

We may be required to provide the limited non-content information we do have in response to valid legal requests

11. レート制限と乱用防止

We employ rate limiting to prevent abuse (currently 30 secrets per 15 minutes per IP address)
We limit failed decryption attempts to prevent brute force attacks (20 attempts per 15 minutes per IP address)
We reserve the right to modify these limits at any time

12. サービスの変更

We reserve the right to modify, suspend, or discontinue the service at any time
We may change these Terms of Use at any time
Continued use of Ghost Message constitutes acceptance of the current Terms

13. 安全な利用のためのユーザーへの推奨事項

We recommend that users:

Share the URL and passkey through different channels for maximum security
Ensure recipients access messages before expiration
Do not use the service for critical or long-term information storage
Consider the sensitivity of content before sharing

14. 知的財産

Ghost Message and its associated code, design, and trademarks are the property of the service owner
Users retain all rights to their content

15. 責任の制限

To the fullest extent permitted by law, we shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages.

We specifically disclaim all liability for:

Content of messages sent using our service
Illegal or unauthorized use of our service
Deletion of messages after viewing or expiration
Inability to access or decrypt messages when encryption keys are lost

16. 免責事項

Users agree to indemnify and hold harmless Ghost Message, its operators, and affiliates from any claims arising from:

User's use of the service
User's violation of these Terms
Content shared through the service

17. 準拠法と裁判管轄

These Terms shall be governed by the applicable laws
If any provision of these Terms is found to be unenforceable, the remaining provisions will remain in full effect

18. 自動モニタリングの禁止

Due to our technical architecture, we cannot and do not monitor, filter, or screen the content of messages
Users are solely responsible for complying with all applicable laws regarding the content they share

19. 統計情報

We collect anonymous statistical information about service usage (number of messages created and viewed)
This information contains no user identifiers or message content

20. ゼロ知識の制限に関する通知

Users explicitly acknowledge and agree that:

Due to the zero-knowledge design of Ghost Message, we cannot know or control what content is being shared
We cannot assist in message recovery if encryption keys are lost
We cannot verify the identity of message senders or recipients
We provide the technical infrastructure only and take no responsibility for how it is used

21. 連絡先情報

For questions about these Terms or the service, please contact us via email.