# EFSEXT

> [HTML Version](efsext_sp.htm)

**EFSEXT=ext1 \{,ext2, ext3,...ext10\}**

EFXEXT specifies which file extensions are to be encrypted. An encrypted file will be created if the following conditions are met: 

•	The file is being created with either OPEN for output or ALLOCATE

•	The extension is in the EFSEXT list

•	A-Shell's Encrypted File System (EFS) is licensed and enabled

•	EFS has not been disabled via XCALL ASFLAG,1024 

Note that [EFS](efssbr.md) is an entire system for file encryption and security. It is not included in the standard release of A-Shell, must be licensed as an option, and should be carefully considered before being implemented. If you are interested in implementing this filing system, see the documentation on the subroutine [EFS](efssbr.md) and contact MicroSabio to discuss.