HAMBURG (Reuters) - German fintech company N26, which made its name mocking traditional banks, has found itself on the receiving end of criticism after a security researcher proved its smartphone apps exposed users to potential account hijacking.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=-Mz8dOzWvwk:0Za3LmrtYOY:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=-Mz8dOzWvwk:0Za3LmrtYOY:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=-Mz8dOzWvwk:0Za3LmrtYOY:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=-Mz8dOzWvwk:0Za3LmrtYOY:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=-Mz8dOzWvwk:0Za3LmrtYOY:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/-Mz8dOzWvwk" height="1" width="1" alt="" />