I have a German passport, an ID card and a driver's licence. The signature in the latter is seven years old and looks completely different from the current signature - which so far was fine since where I live it isn't used for identification. What concerns me way more is the fact that I am going to travel from Europe to South East Asia. The electronic device that was used to capture my signature on had an abysmal sampling rate. The resulting signature in my passport looks vaguely similar to my actual signature. It looks like a child tried to forge my signature. Same issue with my ID. The signature on the passport and on the ID don't look the same.
Are there going to be issues at the airport or somewhere else when officers try to identify me even though the image in the passport strongly resembles me? (Bonus question: Is the speed with which I wrote the strokes recorded and used for identification? I adapted my writing speed to the tablet's sampling rate which probably does not correlate in any way with the real speed.)
If it matters: In my country, passports of citizens younger than 24 years are only valid for 6 years, otherwise 10 years. One could argue at the airport that I'm still young and my signature underlies changing. I'm not really comfortable with arguing with airport officers.