The XTS algorithm block size in bytes. Must be multiple of 16. Default value is 65536, maximum number is 1048576. Use smaller buffer if you read very small parts of a stream from different places, or use larger buffer if you do sequential reads of large blocks. Setting this value might negatively impact the performance.

Number of iterations for key derivation (derived from the password using PBKDF2 defined by RFC 2898).

Length of AES keys (derived from the password using PBKDF2 defined by RFC 2898).