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The back of the card shows the chip, which will hold personal data.
The Home Office said it was "satisfied that the personal data on the card, including the chip, cannot be changed or modified".
Cambridge University security expert Richard Clayton said while it was feasible that the cryptography on the card could be unbreakable, for the card to be completely secure, the entire system would need to be completely secure.
"You can produce cryptography which is extremely strong, but what if you bribed someone on the inside to change details and produce a card for you?" said Clayton. "You have to look at the entire system design to say whether details could be changed. You can't just look at one narrow part."
