School device carts

[dontlook]

So I have been doing a lot of research on Sesamee style locks (Master 175, Master 975, CCL Sesamee). They can all be decoded with out too much trouble, the CCL Sesamee being the hardest to decode. My carts all came with Master 175s. I have to give the codes/combo to the teachers and other staff to be able to open the carts.
I was thinking of replacing them all with CCL Sesamees but those are still bypassable and decodable. The carts get locked up in a room at night, so we really are not talking about a need for a huge amount of brute force resistance. I don't think a key system would work, there are probably 100 staff members.

I was considering the Master Speed Dial as they programmable, folks can't leave them on the correct combination, and are virtually impossible to decode.

Any other suggestions for a programmable padlock?

[Evan]

So I have been doing a lot of research on Sesamee style locks (Master 175, Master 975, CCL Sesamee). They can all be decoded with out too much trouble, the CCL Sesamee being the hardest to decode. My carts all came with Master 175s. I have to give the codes/combo to the teachers and other staff to be able to open the carts.
I was thinking of replacing them all with CCL Sesamees but those are still bypassable and decodable. The carts get locked up in a room at night, so we really are not talking about a need for a huge amount of brute force resistance. I don't think a key system would work, there are probably 100 staff members.

I was considering the Master Speed Dial as they programmable, folks can't leave them on the correct combination, and are virtually impossible to decode.

Any other suggestions for a programmable padlock?

@dontlook:

Cheap keyed master padlocks, all keyed alike. Each lock will come with 2 keys. You didn't say how many carts you have in circulation. But these locks seem only to keep people from casually walking away with the equipment when it is deployed/in use during the day as you described that they are all returned to a secured area for night time storage.

Using combination locks with that many people is insane, unless they are all set to the same combination anyway, but what happens when one of the locks accidentally (or purposefully) gets reset to a different combination than the one it should be ?

Consider the locks on these carts as nothing more than a tamper seal just like the padlocks used by utility companies to secure such things as gas meters and electrical transformers/switches.

~~ Evan

[dontlook]

Thanks, its probably 9-12 carts. The combination varies based on the device type(one for the laptops, one for the iPads). The combo is the same and its probably 100+ staff members that need to be able to use the carts. Someone is not always there to hand out keys and I can't imagine teachers would reliably track/return keys.

In the three years I have been there none of the locks have been accidentally reprogrammed. We have had locks fail to operate consistently(that was before company X switched from the knockoff to actual manufacturer model of lock).
We have had two locks that someone thought were changed or not operating properly, but they turned out to be laptop cart lock on an iPad cart and different locations lock that made it here. The current locks are easily bypassed with the right tools and easy to decode. It takes me a minute or less to bypass and 5 min to decode. The code change requires a key which is an advantage over the SpeedDial.

We found a picture of the combination on one of the iPads once, just recoded all the locks the next week.