  The aim of the paper is to provide a solution which increases the security of
a mobile environment for both individuals and for workers in an enterprise. The
proposed solution adapts Shamir's approach for sharing a secret for encryption
key management. One part of the key is stored on a Bluetooth (or NFC) wristband
or on an enterprise server, while a mobile device is used to store all the
rest. The approach can be applied for both securing documents and voice data.
The solution is supported by a mathematical formality which is missing in the
currently known advice within cryptographic folklore.
