I have several cck fields that shouldn't be modified once after the node is created. For example like fields for gender, name, birth date and so on. Is it possible to hide or make them unable to edit those fields by users after the node creation? I thought maybe I could do that by Rules but unfortunately it seems that there is no action for hiding cck field forms though it has the condition for "if field has a value".
I think the link below will be helpful to you..
Check this link and let me know if in case of any query.
I've not used the module, but Field Permissions appears to create the level of permissions you are looking for, eg, it grants users permission to CREATE a CCK field value separate from the permission to EDIT it.