Hash key
The hash key processing rule copies the value of a specified source key, hashes that value, then stores the hashed copy in a specified destination key. This destination can be either a new or existing key.
Configuration parameters
| Parameter | Description | Default |
|---|---|---|
| Source key | Required. The key whose value to hash. The value of this key must be a string and not a number, Boolean, array, or object. | none |
| Destination key | Required. The key that stores the hashed value of Source key. If you specify the name of an existing key, the hash keys rule overwrites the value of that key. If you don't specify a key name, this rule creates a new key with the name _SOURCE_HASH_, where SOURCE is the name of your Source Key and HASH is the name of your Hash algorithm. | none |
| Encoding algorithm | Required. The scheme to store your hashed value. Accepted values: Base64, Binary, Hexadecimal. | Hexadecimal |
| Hash algorithm | Required. The algorithm to hash your value. Accepted values: MD5, SHA256. | SHA256 |
| Comment | A custom note or description of the rule's function. This text is displayed next to the rule's name in the Actions list in the processing rules interface. | none |
Example
Using the hash keys rule lets you store values in hashed format, which can help validate the authenticity and integrity of your data.
For example, given the following sample website log data:
{"timestamp":"2023-03-28T09:08:41.64283645Z","user_id":3,"page_id":30,"action":"purchase"}
{"timestamp":"2023-03-28T09:08:42.643343109Z","user_id":4,"page_id":10,"action":"purchase"}
{"timestamp":"2023-03-28T09:08:48.643600498Z","user_id":1,"page_id":50,"action":"click"}
{"timestamp":"2023-03-28T09:08:50.643773688Z","user_id":5,"page_id":40,"action":"purchase"}
{"timestamp":"2023-03-28T09:08:51.643932272Z","user_id":1,"page_id":30,"action":"purchase"}
{"timestamp":"2023-03-28T09:08:56.644080944Z","user_id":2,"page_id":40,"action":"click"}
{"timestamp":"2023-03-28T09:09:03.64425954Z","user_id":3,"page_id":30,"action":"click"}
{"timestamp":"2023-03-28T09:09:03.644317046Z","user_id":1,"page_id":20,"action":"view"}
{"timestamp":"2023-03-28T09:09:10.64447719Z","user_id":2,"page_id":50,"action":"purchase"}
{"timestamp":"2023-03-28T09:09:17.644810963Z","user_id":2,"page_id":10,"action":"view"}
{"timestamp":"2023-03-28T09:09:20.644994805Z","user_id":1,"page_id":50,"action":"view"}A processing rule with the Source key value action, the Output scheme
value Hexadecimal, and the Hash algorithm value SHA256 returns the following
result:
{"user_id":3,"page_id":30,"action":"purchase","action_sha256":"7048dc8aa7663e713097535171b4ed72ab015705a885de9636e66d4b1fa18804","timestamp":"2023-03-28T09:08:41.64283645Z"}
{"user_id":4,"page_id":10,"action":"purchase","action_sha256":"7048dc8aa7663e713097535171b4ed72ab015705a885de9636e66d4b1fa18804","timestamp":"2023-03-28T09:08:42.643343109Z"}
{"user_id":1,"page_id":50,"action":"click","action_sha256":"e5c7ffac26fed654fe62045898f55b551a0dc120badf3d116bcd364418f3ec16","timestamp":"2023-03-28T09:08:48.643600498Z"}
{"user_id":5,"page_id":40,"action":"purchase","action_sha256":"7048dc8aa7663e713097535171b4ed72ab015705a885de9636e66d4b1fa18804","timestamp":"2023-03-28T09:08:50.643773688Z"}
{"user_id":1,"page_id":30,"action":"purchase","action_sha256":"7048dc8aa7663e713097535171b4ed72ab015705a885de9636e66d4b1fa18804","timestamp":"2023-03-28T09:08:51.643932272Z"}
{"user_id":2,"page_id":40,"action":"click","action_sha256":"e5c7ffac26fed654fe62045898f55b551a0dc120badf3d116bcd364418f3ec16","timestamp":"2023-03-28T09:08:56.644080944Z"}
{"user_id":3,"page_id":30,"action":"click","action_sha256":"e5c7ffac26fed654fe62045898f55b551a0dc120badf3d116bcd364418f3ec16","timestamp":"2023-03-28T09:09:03.64425954Z"}
{"user_id":1,"page_id":20,"action":"view","action_sha256":"2bcb43cbc8f6b7ef66331532881143fcbae60a879db3a8fb853f645bb24c2b3c","timestamp":"2023-03-28T09:09:03.644317046Z"}
{"user_id":2,"page_id":50,"action":"purchase","action_sha256":"7048dc8aa7663e713097535171b4ed72ab015705a885de9636e66d4b1fa18804","timestamp":"2023-03-28T09:09:10.64447719Z"}
{"user_id":2,"page_id":10,"action":"view","action_sha256":"2bcb43cbc8f6b7ef66331532881143fcbae60a879db3a8fb853f645bb24c2b3c","timestamp":"2023-03-28T09:09:17.644810963Z"}
{"user_id":1,"page_id":50,"action":"view","action_sha256":"2bcb43cbc8f6b7ef66331532881143fcbae60a879db3a8fb853f645bb24c2b3c","timestamp":"2023-03-28T09:09:20.644994805Z"}This rule hashed the value of action from each log entry and stored the hashed
value in a new key named action_sha256.