Your IVA is a private agreement between you and your creditors.

Insolvency Practitioner and creditors will know about your IVA.  Once your IVA has been agreed by your creditors, it is recorded on the IVA register which is a database with the details of IVA nationwide.

This register is a public record, and everyone is at liberty to access the register for information, but in all probability, your friends and family will not go and search through it.