ecryptfs

Securing data has become an essential necessity in the digital age, not least for safeguarding personal and professional information from unauthorized access. On Linux systems, one powerful tool available for encrypting files is eCryptfs (Enterprise Cryptographic Filesystem). It’s a POSIX-compliant enterprise-class stacked cryptographic filesystem that's incredibly robust and seamlessly integrates with the Linux environment. eCryptfs is a layered or "stacked" filesystem, meaning it functions on top of the existing filesystem without requiring a separate disk partition. It encrypts individual files using a variety of algorithms and stores metadata in the header of each file, making it a convenient and flexible encryption solution.