Which encryption technique is used for data transfer in SFTP?

Question

When I send a file using Rebex SFTP which encryption algorithm is applied on the file while transfer.

Answer 1

SFTP runs over SSH 2.0. SSH is an encrypted network protocol that utilizes various asymmetric and symmetric encryption algorithms.

For more information about SSH, check out these sources:
http://www.snailbook.com/protocols.html
http://docstore.mik.ua/orelly/networking_2ndEd/ssh/
http://en.wikipedia.org/wiki/Secure_Shell

Rebex SFTP makes it possible to specify which cryptographic algorithms can be used by the underlying SSH protocol.