Simple logo for IT secure identity specialist id2.dk

This is what id2 was looking for in their logo design

id2 is a small IT-security company with expertise in secure digital identity such as two-factor authentication which the name "id2" hints at, secure eID and digital signature. We are by now using lowercase letters, century old schoolbook font and a dark orange, as can be seen at our homepage www.id2.dk. But we would like creative suggestions for a logo. Read more