Getting corrupt awdd system diagnostic messages

I have noticed these entries in my Mac-mini system diagnostic logs such as

awdd_2015-05-14-110050_Mac-mini.awd

What concerns me most is that the content looks corrupted:

z’ į·˝‘)(ìÄ$0Ífi öņ ¿ į·˝‘) (08@HP X`hpxÄ ä ä ä ä ä ä ä ä »¯≈å ä ä ä ä ä ê ò † ® ∞ ∏ ¿ » – ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * ⁄ * * z áÀÎË‘)(ÄĆ 0Òfi ÇÄÄ

ÖÀÎË‘) z áÀÎË‘)(ÄĆ 0Òfi ÇÄÄ

ÖÀÎË‘) zP ∫’ÌË‘)(êĆ 0Úfi ÇÅÄ

; identityservicesd $D0611E78-BBB4-4591-A5F8-487910AE4366z Í…≈å’)(ÄĆ 0Òfi ÇÄÄ

Ë…≈å’) z Í…≈å’)(ÄĆ 0Òfi ÇÄÄ

Ë…≈å’) z À¯≈å’)(ÅÄ$0Ñfl äĆ ¯≈å’) zP ®∂»å’)(êĆ 0Úfi ÇÅÄ

; identityservicesd $D0611E78-BBB4-4591-A5F8-487910AE4366

I have wireless turned off but Bluetooth is on.

Anyone else getting messages like these?

Thanks