If my data would be encrypted by WannaCry Would the hacker actually have access to my data?

[G+_Todd Nielsen]

If my data would be encrypted by WannaCry. Would the hacker actually have access to my data?

[G+_Joe Thompson]

No, the current version does not transmit it only encrypts so you can't access it either.

[G+_Fr. Robert Ballecer, SJ]

Yes... Because WC also install the "DoublePulsar" back door.