1config FS_ENCRYPTION 2 tristate "FS Encryption (Per-file encryption)" 3 depends on BLOCK 4 select CRYPTO 5 select CRYPTO_AES 6 select CRYPTO_CBC 7 select CRYPTO_ECB 8 select CRYPTO_XTS 9 select CRYPTO_CTS 10 select CRYPTO_CTR 11 select CRYPTO_SHA256 12 select KEYS 13 select ENCRYPTED_KEYS 14 help 15 Enable encryption of files and directories. This 16 feature is similar to ecryptfs, but it is more memory 17 efficient since it avoids caching the encrypted and 18 decrypted pages in the page cache. 19