External IV Tokenization Properties

The tokenization with the External IV is done only if the IV is specified during the protect operation through the end user API. When performing unprotect and re-protect operations, the same IV value used for protection must be identified.

If External IV is not provided in either a protect or unprotect function call, then the input is tokenized as-is without any IV.

The External IV value has the following properties:

• Supports ASCII and Unicode characters.
• Minimum 1 byte for the input.
• Maximum 256 bytes for the input.
• Empty and NULL strings are not supported as External IV values. These strings will be ignored during tokenization. The process will continue as if External IV was not used.

Here is an example of the tokenized input value with the External IV for a Numeric token:

Table: Example-External IV for a Numeric token