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 KEYS 12 help 13 Enable encryption of files and directories. This 14 feature is similar to ecryptfs, but it is more memory 15 efficient since it avoids caching the encrypted and 16 decrypted pages in the page cache. 17