The term secure file transfer protocol can refer to both following protocols:
- SSH file transfer protocol, a file transfer protocol specifically developed by the IETF to run over secure shell (SSH) connections
- Secure FTP, the practice of running a normal FTP protocol session over SSH (FTP over SSH)
The ambiguity comes from the acronym for the SSH-based SSH File Transfer Protocol having the same acronym as one of the terms referring to tunneling regular FTP connections over SSH: Secure FTP.
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