
Hem and Haw oleh Tin Le
Looks for hashed email addresses (HEMs) and other personal information sent to third parties.
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Metadata Ekstensi
Tangkapan Layar




Tentang ekstensi ini
https://tincangit.github.io/hemandhaw-study/
About Hem and Haw:
This browser extension monitors when hashes of your personally identifiable information (like emails or phone numbers) are sent to third parties.
How it works:
1. You enter email addresses, phone numbers, and/or other details, and press submit.
2. Hem and Haw creates hashes of these inputs.
3. When a matching hash is detected being sent to a third party, Hem and Haw takes note and logs to our server:
- Type of data (e.g., email),
- Hash type (e.g., MD5),
- Third party's hostname,
- Originating website's hostname,
- Where in the transmission (HTTP request) the hash was found,
- HTTP Referer,
- User Agent,
- Whether you use an adblock and your self-reported privacy-consciousness score
At any point, you can stop Hem and Haw from searching for hashes, add/modify/delete the PII to search for, and see the logs of transmissions. You can use Hem and Haw to see where your hashed PII is being sent from and to!
What Hem and Haw does NOT collect:
- Your actual personal data (e.g., email addresses or phone numbers),
- HTTP request details and data,
- Any other personal information. Your IP address is also not collected by our server.
IMPORTANT NOTE:
Hem and Haw will clear all results when you clear all history.
Data collection is approved as part of a University of Calgary research study: REB25-0355_MOD1.
About Hem and Haw:
This browser extension monitors when hashes of your personally identifiable information (like emails or phone numbers) are sent to third parties.
How it works:
1. You enter email addresses, phone numbers, and/or other details, and press submit.
2. Hem and Haw creates hashes of these inputs.
3. When a matching hash is detected being sent to a third party, Hem and Haw takes note and logs to our server:
- Type of data (e.g., email),
- Hash type (e.g., MD5),
- Third party's hostname,
- Originating website's hostname,
- Where in the transmission (HTTP request) the hash was found,
- HTTP Referer,
- User Agent,
- Whether you use an adblock and your self-reported privacy-consciousness score
At any point, you can stop Hem and Haw from searching for hashes, add/modify/delete the PII to search for, and see the logs of transmissions. You can use Hem and Haw to see where your hashed PII is being sent from and to!
What Hem and Haw does NOT collect:
- Your actual personal data (e.g., email addresses or phone numbers),
- HTTP request details and data,
- Any other personal information. Your IP address is also not collected by our server.
IMPORTANT NOTE:
Hem and Haw will clear all results when you clear all history.
Data collection is approved as part of a University of Calgary research study: REB25-0355_MOD1.
Rated 0 by 0 reviewers
Permissions and dataPelajari lebih lanjut
Required permissions:
- Unduh berkas dan baca serta ubah riwayat unduhan peramban
- Mengakses riwayat penjelajahan
- Mengakses tab peramban
- Mengakses aktivitas peramban selama navigasi
Optional permissions:
- Mengakses data Anda pada semua situs
Informasi lebih lanjut
- Tautan Pengaya
- Versi
- 3.6.0
- Ukuran
- 1,44 MB
- Terakhir dimutakhirkan
- 3 jam yang lalu (19 Sep 2025)
- Kategori Terkait
- Lisensi
- Lisensi MIT
- Kebijakan Privasi
- Baca kebijakan privasi dari pengaya ini
- Riwayat Versi
- Tag
- Tambahkan ke koleksi
Catatan rilis untuk 3.6.0
- Added clear extension data button
- Updated interface, now has a separate welcome page and survey page
- Now reports referer of hashed transmissions
- New survey item: Have you ever been notified your data has been in a data breach?
- Bug fixes
For prolific users:
- Hem and Haw now reports to us the number (up to 10) of unique domains you visit between daily Prolific heartbeat pings. This is to help determine sufficient usage for weekly bonus payments. If you visit 10 or more unique domains, it will only report 10+, not the exact number.
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