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