It may help you with digital security (9,5)

'digital security' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'it may help you' is the wordplay.
I cannot really see how this works, but
'it' could be 'sa' (old-fashioned abbreviation for sex appeal) and 'sa' is present in the answer.
'you' could be 'u' (commonly used in online communication) and 'u' is found within the answer.
This explanation may well be incorrect...

'with' is the link.

Can you help me to learn more?