Skjønt krypteringen virker, stoppet ikke tofaktorautentiseringen den uvedkommende.

Skjønt means although, though, or even though.

It is correct Norwegian, but it sounds a bit more formal or literary than the very common everyday alternative selv om. So:

• Skjønt krypteringen virker ...
• Selv om krypteringen virker ...

Both are understandable, but selv om is what many learners will hear more often in daily speech.

This is because of the Norwegian V2 rule: in a main clause, the finite verb normally comes in the second position.

Here, the whole subordinate clause Skjønt krypteringen virker comes first. After that, the main clause begins, and the finite verb stoppet must come before the subject tofaktorautentiseringen:

• Skjønt krypteringen virker, stoppet ikke tofaktorautentiseringen den uvedkommende.

If the main clause stood alone, you would normally say:

• Tofaktorautentiseringen stoppet ikke den uvedkommende.

So the changed order is caused by the fronted clause at the beginning.

In a main clause, ikke usually comes after the finite verb:

• stoppet ikke

That is standard Norwegian word order.

Compare:

• Main clause: Tofaktorautentiseringen stoppet ikke den uvedkommende.
• Subordinate clause: ... fordi tofaktorautentiseringen ikke stoppet den uvedkommende.

So in main clauses, ikke usually follows the finite verb, while in subordinate clauses it usually comes before it.

The endings -en show the definite singular form of these nouns:

• kryptering = encryption

• krypteringen = the encryption

• tofaktorautentisering = two-factor authentication
• tofaktorautentiseringen = the two-factor authentication

The sentence is talking about specific, identifiable things, not encryption or two-factor authentication in general.

This is very normal in Norwegian. The definite ending is attached directly to the noun instead of using a separate word like English the.

Yes. Norwegian normally writes compound nouns as one word.

So:

• to
  • faktor
    • autentisering
      • -en
• tofaktorautentiseringen

This is completely normal in Norwegian, even when the compound becomes long. English often separates these parts more than Norwegian does.

Here, den uvedkommende means something like:

• the unauthorized person
• the intruder
• the outsider

The adjective uvedkommende can mean unrelated, not relevant, or unauthorized / not entitled to be there, depending on context.

In a security context like this one, it means the person who should not have access.

Because uvedkommende is being used like a noun phrase meaning the unauthorized person.

This is an example of an adjective being used substantively. Norwegian often does this with:

• den + adjective

So:

• den uvedkommende = the unauthorized person
• de ansvarlige = the responsible ones
• den syke = the sick person

Without den, uvedkommende would more naturally function as an adjective, not as a definite noun phrase.

This can happen when Norwegian combines:

• a general present fact/state
• with a specific past event

So krypteringen virker suggests that the encryption works in general, while stoppet ikke refers to a particular occasion when the two-factor authentication failed to stop someone.

If the speaker wanted everything fully anchored in the past, virket could also be possible in some contexts:

• Skjønt krypteringen virket, stoppet ikke tofaktorautentiseringen den uvedkommende.

But the original version can make sense if the speaker is saying: the encryption is functional, yet that still did not stop the intruder on that occasion.

Originally, uvedkommende is an adjective, but here it is being used substantively, meaning it functions like a noun.

So grammatically, it behaves like:

• the unauthorized one
• the person not entitled to be there

This is similar to English expressions like the rich, the poor, or the accused, where an adjective takes on a noun-like role.

Because the sentence begins with a subordinate clause:

• Skjønt krypteringen virker

and then moves to the main clause:

• stoppet ikke tofaktorautentiseringen den uvedkommende

In Norwegian, it is normal to put a comma after an initial subordinate clause. So the comma helps mark the boundary between the two parts of the sentence.

The sentence is understandable and grammatically fine, but some parts sound a bit formal or technical.

More everyday alternatives might include:

• Selv om krypteringen virker, stoppet ikke tofaktorautentiseringen den uvedkommende.
• Selv om krypteringen fungerer, stoppet ikke tofaktorautentiseringen inntrengeren.

A few notes:

• selv om is more common in speech than skjønt
• fungerer can sometimes sound more natural than virker for technology
• inntrengeren may sound more concrete than den uvedkommende

Still, the original sentence is perfectly useful for learning because it shows real Norwegian grammar clearly.