Encryption for Jira allows you to encrypt both single line and multi-line custom text fields. To create a new encrypted custom field, complete the following steps:
Once created, the value of the text field will be encrypted within the Jira Database.
By default, encrypted custom fields have the Encrypted Text Field Searcher template. Users can search for texts in the same way as they do with Jira's native custom text fields.
To be able to index the fields, Lucene stores the decrypted values. Therefore, a user with access to the file system could access the Lucene indexes and see the values of the fields.
If required, you can unlink the field from the searcher by editing the field and selecting None from the Search Template drop-down.
Lucene will not store any decrypted value, and users will be able to search by this custom field in a filter.