# Internally Blockcerts store all user data publicly on Etherium blockchain?

**URL:** https://community.blockcerts.org/t/internally-blockcerts-store-all-user-data-publicly-on-etherium-blockchain/2090
**Category:** Technical
**Created:** [September 18, 2019, 7:17am UTC](https://community.blockcerts.org/t/internally-blockcerts-store-all-user-data-publicly-on-etherium-blockchain/2090 "2019-09-18T07:17:28Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![ramprasad](https://avatars.discourse-cdn.com/v4/letter/r/0ea827/32.png) [@ramprasad](https://community.blockcerts.org/u/ramprasad)
#### Post date: [September 18, 2019, 7:17am UTC](https://community.blockcerts.org/t/internally-blockcerts-store-all-user-data-publicly-on-etherium-blockchain/2090/1 "2019-09-18T07:17:28Z")

</div>

Internally Blockcerts store all user data(or certificate data) publicly on Etherium blockchain(anyone can read certificate data on etherium blockchain) or store only hash of the data and verify this hash with input json at verification?

---

<div class="post-metadata">

### Author: ![aronning](https://avatars.discourse-cdn.com/v4/letter/a/47e85d/32.png) [@aronning](https://community.blockcerts.org/u/aronning)
#### Post date: [September 18, 2019, 1:20pm UTC](https://community.blockcerts.org/t/internally-blockcerts-store-all-user-data-publicly-on-etherium-blockchain/2090/2 "2019-09-18T13:20:51Z")

</div>

Only the hash. Check out [https://www.blockcerts.org/guide/](https://www.blockcerts.org/guide/)