![Quark-with-a-code-sequencer](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/5/59/Quark-with-a-code-sequencer.jpg/revision/latest/scale-to-width-down/180?cb=20080328200701&path-prefix=en)
Quark using a code sequencer.
A code sequencer was a piece of technology used as a form of lock for cargo containers.
In 2373, Quark claimed that he needed to retrieve a descrambler because the code sequencer on a container of Varaxian LM-7 was not working properly, making him unable to open the container. (DS9: "Business as Usual")