What is it, how does it work? (Sidebar??)

[Chucklz]

There is a system, I think perhaps by Evva or DOM, where there are elements in cylinder that the key does not interact with. But, if you move while picking, they jam up the cylinder.

P.S. My favorite German lock term is Schloss (padlock/castle).

[p1ckf1sh]

I was never good with the German terms (learned all the theory from English sites ), but in my mind "Nachschließsicherheit" is security against using a similar key - which means it needs low tolerances and many key variations. Key variations could of course be generated by profile checking balls.

No, "nachschließen" is a general term. The cops and insurance companies use it for any kind of attack that is not destructive to the lock and consists of manipulating the lock itself in order to make the plug rotate, so that could be bumping or actually picking the lock pin by pin or e-picking it etc.. It confused me as well when I first read it.

And then I think "Abtastsicherheit" is security against decoding the lock, means, measuring what key cuts are required etc.

You might be right with that. I considered Abtastsicherheit to be some kind of measure against the using of probes or feeler picks to find binding pins and manipulate them (such as heavy warding etc.). I have seen websites that refer to picks and picksets as "Tastbesteck".

While "Aufsperrsicherheit" would be the security against picking...

Au contraire again, I would consider this to be security against bypassing techniques.

(Not 100% sure about that, though, I might be confused... )

Same here.

In fact I find the German terms for this trade are really funny... Like "Falle" for a latch (also translates to 'trap') or "Zuhaltung" for 'locking element' - quite similar to "Zuhaelter" = 'pimp'...

Yes, that is a weird thing in the german language. Traditionally, german has relatively few words, meaning that many words have up to 3 or 4 meanings (take "Lager" = Lager für Dinge/Waren, Lager im mechanischen Sinne (Kugellager etc.), Lager als Aufenthalt (Zeltlager, Gefangenenlager etc.)). That is how we originally started to make up words by just stringing them together (Öldruckzylinderprüfventil )...

[Chucklz]

Does nachschließen have the sense of non destructive entry? Something that opens the lock but doesn't damage it? So picking, bypass, bumping and other methods all apply here?

[mh]

There is a system, I think perhaps by Evva or DOM, where there are elements in cylinder that the key does not interact with. But, if you move while picking, they jam up the cylinder.

I've seen this
http://wiki.whatthehack.org/images/0/00 ... ntatie.pdf
(page 8: M&C Antiklop)

But the one you mentioned sound even more advanced
Any more details?

P.S. My favorite German lock term is Schloss (padlock/castle).

"Schloss" even translates to any kind of lock in general... So it's the most holistic term of German lockpicking

[p1ckf1sh]

Does nachschließen have the sense of non destructive entry? Something that opens the lock but doesn't damage it? So picking, bypass, bumping and other methods all apply here?

Yes. I am not sure about bypassing though. The verbatim is often "Nachschließen des Schlosses" (nachschließen of the lock), so if you open a unlocked door by jamming a card between door and frame to release the latch this is essentially bypassing in the english meaning, but I am not sure if it is nachschließen, because you actually don't touch the lock.

[mh]

Does nachschließen have the sense of non destructive entry? Something that opens the lock but doesn't damage it? So picking, bypass, bumping and other methods all apply here?

I guess asking 2 experts will bring 3 opinions here.

Who has the authority on this? - I doubt the "Duden" (which is considered pretty authorative) contains these words. Don't have one at hand, though.

SSDeV http://www.lockpicking.org - 'the' German lockpicking association calls itself "Sportsfreunde der Sperrtechnik" -
"Sperrtechnik" comes from "Aufsperren" -
not "Sportsfreunde der Nachschliesstechnik"

VdS uses "Nachschliessen" also in the context of key / profile variation: http://www.vds.de/pdf/vds5476.pdf

It would be interesting to see what DIN says, but I'm not sure if they touch the topic in DIN 18252 and I also don't know where to get it.

So - in my opinion still "Aufsperren" is the general term for non-destructive entry.

But what the heck...

[p1ckf1sh]

Found something nice:

http://www.schliessanlagen-ab-werk.de/Lexikon.htm

Glossary of lock-related german terms...

Abtastsicherheit
Die Abtastsicherheit ist der Grad der Erschwerung, die Schließkodierung der Zuhaltungen eines Schließzylinders mit geeigneten Hilfsmitteln gewalt- und spurenlos aus dem Schließzylinder zu ermitteln, um nach den festgestellten Werten einen Nachschlüssel anzufertigen.

(Accordingly, "abtasten" is decoding without leaving traces or using brute force or lock disassembly)

Aufsperrsicherheit
Die Aufsperrsicherheit ist der Grad der Erschwerung, die Sperrorgane eines Schließzylinders gewaltlos mit Hilfsmitteln ohne Kenntnis des zugehörigen Schlüssels zerstörungsfrei zu überwinden.

(Accordingly, "aufsperren" is non-destructive bypassing of the locking elements without any knowledge of the key, so based on their definitions picking the lock would be aufsperren)

Nachschließsicherheit
Die Nachschließsicherheit ist der Grad der Erschwerung, den Schließzylinder mit einem anderen als dem zugehörigen Schlüssel zu betätigen.

(Accordingly, "nachschließen" is actually unlocking the lock (rotating the plug) with a key that is not the one cut for this lock)

I am not sure if they are 100% correct, though... I seem to remember seeing a forensic microscope picture of a lock that was e-picked (photo showed the marks left on the pins), published by some insurance company, and they used the term "nachschließen". Someone is inaccurate in their vocabulary here...