File validation using SFTP

Question

I am using an application that uploads a bunch of files to an Akamai NetStorarge server over either FTP or SFTP. Since some of these files are several MB in size, I would like to validate that what the server has is indeed what I sent.

Using FTP, this was handled quite easily through FTP extensions (supported by Akamai). Using these extensions, I would begin the upload operation by telling the server the MD5 of the file I

Answer 1

There are no checksums for file transfers in the SFTP protocol. The MACs are for verifying that a given packet is transmitted correctly rather than an entire file. So it is possible (although very unlikely) that a file could be transferred incorrectly.