What is SFTP? What is the difference between

What is SFTP? This article will introduce SFTP to you and let you understand the differences between SFTP and FTP. I hope it will be helpful to you.

What is SFTP?

SFTP is a secure file transfer protocol, a secure method of transferring files over a network; it ensures that data is transferred securely using a private and secure data stream.

SFTP requires that client users must be authenticated by the server and data transfer must occur over a secure channel (SSH), i.e. no clear text passwords or file data are transferred. It allows various operations to be performed on remote files, somewhat like the Remote File System protocol. SFTP allows recovery from operations such as suspended transfers, directory listing, and remote file deletion.

Differences between SFTP and FTP

SFTP and FTP are very similar and both support batch transfers (Transfer multiple files at once), folder/directory navigation, file movement, folder/directory creation, file deletion, etc. But there are still differences. Let's take a look at the differences between SFTP and FTP.

1. Secure Channel

FTP does not provide any secure channel to transfer files between hosts; while the SFTP protocol provides a secure channel for transferring files between hosts on the network .

2. Protocol used

FTP uses TCP/IP protocol. However, SFTP is part of the SSH protocol, which is a remote login information.

3. Link method

FTP uses the control connection on TCP port 21 to establish a connection. However, SFTP is a secure connection established between the client and server through the SSH protocol (TCP port 22) to transfer files.

4. Security

FTP passwords and data are sent in plain text format and are not encrypted in most cases, so security is not high. However, SFTP will encrypt the data before sending it. It is transmitted in binary form and cannot be read "as is", so it is highly secure.

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