Merge pull request #12339 from nextcloud/update-encryption-docs

chore: Update notes on public sharing key

Author: nfebe

admin_manual/configuration_files/encryption_details.rst

@@ -21,12 +21,12 @@ These conventions apply throughout this document:
 Key type: master key
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-This is the default encryption mode in Nextcloud. With master key encryption enabled there is one central key that is used to secure the files handled by Nextcloud. The master key is protected by a password that can be generated by the server administrator. The advantage of the master key encryption is that the encryption is transparent to the users but has the disadvantage that the server administrator is able to decrypt user files without knowing any user password.
+This is the default encryption mode in Nextcloud. With master key encryption enabled there is one central key that is used to secure the files handled by Nextcloud. The master key is protected by the instance `secret` that is generated at installation time. The advantage of the master key encryption is that the encryption is transparent to the users but has the disadvantage that the server administrator is able to decrypt user files without knowing any user password.
 
 Key type: public sharing key
 ----------------------------
 
-The public sharing key is used to secure files that have been publicly shared. The public sharing key is protected by a password that can be generated by the server administrator. The advantage of the public sharing key is that it is independent of the selected encryption mode so that Nextcloud is able to provide publicly shared files to outside parties.
+The public sharing key is used to secure files that have been publicly shared. The advantage of the public sharing key is that it is independent of the selected encryption mode so that Nextcloud is able to provide publicly shared files to outside parties.
 
 Key type: recovery key
 ----------------------