# PubKey / Passphrase

**URL:** <https://community.blockcerts.org/t/pubkey-passphrase/2862>\
**Category:** Support\
**Created:** [May 19, 2021, 2:38pm UTC](https://community.blockcerts.org/t/pubkey-passphrase/2862 "2021-05-19T14:38:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![LSmith](https://avatars.discourse-cdn.com/v4/letter/l/c77e96/32.png) [@LSmith](https://community.blockcerts.org/u/LSmith)\
**Post date:** [May 19, 2021, 2:38pm UTC](https://community.blockcerts.org/t/pubkey-passphrase/2862/1 "2021-05-19T14:38:48Z")

</div>

I have recently got the hang of creating certificate templates with cert-tools, issuing them onto the bitcoin testnet chain with cert-issuer, and verifying them on the Blockcerts homepage.  
I am now trying to add one of these certificates to the android app, and I am wondering how the passphrases used in the app relate to the public keys used to identify certificate recipients.