By Louis Juricic and Sarina Isaacs
The iPhone drives Apple's business, but as refresh times get longer and prices climb higher, the opportunity for growth diminishes.
Motley Fool host Deidre Woollard recently caught up with Tom Kemp, a cybersecurity expert and author of . To catch full episodes of all The Motley Fool's free podcasts, check out our podcast center. Tom Kemp: That tells you that there is a hunger for privacy.