Balancing the convenience of portability with the necessity of security is a frustratingand constant tug-of-war. Legal professionals demand more freedom in working from home and on the road, but providing too much digital slack requires dangerous sacrifices in data confidentiality.

Most law firms respond to the mobile challenge by setting up secure Citrix Systems farms or firewalled virtual private networks. These setups work well — so long as remote workers have access to a high-speed Internet connection. But for offline access to documents, many people carry one or more USB flash memory drives (aka thumb drives).