Hashing (CSV) block

The hash_csv_columns block hashes CSV data cell by cell using a specified hashing algorithm as a transformation block in a Connect+ dataflow. It applies one-way hashing to designated column headers in the source file, enabling data anonymisation or masking before the data is passed to downstream blocks.

When to use this block

Use this block when you need to anonymise or mask personally identifiable information (PII) — such as email addresses or mobile numbers — before the data is delivered to its destination.

Prerequisites

Before configuring this block, make sure you have:

Identified the column headers that contain data to be hashed
Selected the hashing algorithm appropriate for your security requirements

Configuration fields

Field name	Required	Description
Block name	No	A name for the block instance. The name must be alphanumeric. There is no character limit.
Enabled	Yes	Determines whether hashing is applied. Select `true` or `false` from the dropdown. Default value: `false`.
Hashing Algorithm	Yes	The algorithm used to hash the CSV column data. Select `SHA-256`, `SHA-512`, `MD5`, `SHA-1`, or `RIPEMD-160` from the dropdown. Default value: `SHA-256`.
HeadersToBeHashed	Yes	The column headers to be hashed, entered as a comma-separated list. For example, `email,mobile`.
Delimiter	Yes	The delimiter used to separate fields in the CSV file. Default value: `,`.

Updated about 1 month ago