iPad Pro USB-C to Lightning adapter

We are happy to announce that our TSS-PK7 reader (iOS plug-in reader with lightning connector) and Sub Rosa secure browser can be utilized with the USB-C iPad Pro by using the following adapter here:
This adapter is compatible with Apple's MFi program and is the only adapter that we know of that will work with our TSS-PK7.  Please keep in mind that a standard USB-C reader and adapters will not work with the new iPad Pro.
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iOS 12

iOS 12 was released on September 17, 2018.

The only problem that we've seen with iOS 12 is that sometimes the card reader is not found.

When using all of the following:
… iOS 12
… R2S or Sub Rosa
… iPad (not iPhone or iPod)

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R2S requires Android 6

The latest version of R2S on Android only supports Android version 6.0 and higher. 

If you are running Android OS version 5 or earlier, you will not be able to install the current release of R2S.

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Sub Rosa Pro requires Android 6

The latest version of Sub Rosa Pro on Android only supports Android 6.0 and higher. 

If you are running Android OS version 5 or earlier, you will not be able to install the current release of Sub Rosa Pro.

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"This accessory may not be supported" error when using 30-pin reader with adapter

When using a TSS-PK8 (30-pin reader) with a 30-ping to Lightning adapter, you might receive an error that "This accessory may not be supported".  This is assumed to be a problem with newer devices (e.g. iPhone 7, iPad Pro) and how much power the device requires to work.

In some cases, simply clicking "Dismiss" will allow you to use the reader with Sub Rosa.

If the reader will not be recognized, please contact the Support Department at 


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macOS High Sierra Compatiblity

Update - December 28, 2017

PKard for Mac v1.7

PKard for Mac v1.7 works as expected with macOS High Sierra.

After upgrading to High Sierra, you may need to reinstall PKard for Mac.

We have compiled a short list of Common problems using PKard for Mac on High Sierra.

If you have any questions, please contact our Support Department.

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USB-C to Micro USB Adapter

If you have a phone that has a USB-C port, and you already have a Micro USB card reader, then we recommend that you use an adapter that has already been tested by Thursby Software. Here are some that have been tested in our office:

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Will this app work with Sub Rosa?

In order for you to use your smart card outside of the Sub Rosa, the app developers would need to have built their app using our SDK.  This means that the app in question will know to look to Sub Rosa for smart card credentials.  We recommend that you contact the app developers and inquire about Sub Rosa integration.

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First gen PKard Reader doesn't work with iPad using a lightning adapter.

The problem when connecting the TSS-PK6 reader to an iPad with iOS 8 or newer with a Lightning Adapter is that some communication data that is sent to the hardware when connected has changed.  This change is causing the hardware to reset.  This is why you likely see the error, "This accessory is not supported by this iPad" when you connect the reader with the adapter, even without our app installed.
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