| Old friend | Rafi Eitan |
| Old friend | Earl W. Brian |
| Start Date | 1981-00-00 |
| Notes | Hamilton resigned from the NSA and purchased a small company called Inslaw. Hamilton called the system Promis. By 1981, he had developed it to the point where he could copyright the software and turn Inslaw into a small, profit-making company. During his visits to Tehran, Brian had come to the attention of Rafi Eitan. |