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secure copy protocol (SCP)

Secure Copy Protocol(SCP), like File Transfer Protocol( FTP) or SSH File Transfer Protocol( SFTP), is a file transfer protocol based on Secure Shell (SSH). The SCP protocol itself, which is located at the application layer above Secure Shell, implements encrypted file transfer and thus a secure connection via Secure Shell.

With Secure Copy, the file transfer takes place between the SCP server, which also runs the SCP client program, and the SCP client. The security of the data and its authenticity are ensured by the SSH protocol, Secure Shell (SSH).

Secure Copy Protocol (SCP) on Secure Shell (SSH) in the protocol stack

Secure Copy Protocol (SCP) on Secure Shell (SSH) in the protocol stack

Compared to SSH File Transfer Protocol (SFTP), file transfer is faster with SCP protocol than with SFTP protocol, although both of them use Secure Shell (SSH) encryption for the secured connection. This is because a much more efficient transfer algorithm is implemented in Secure Copy, one that does not wait for packet confirmation. While this leads to much higher transfer rates, it has the disadvantage that the file transfer cannot be interrupted immediately, but only after the transfer is complete.

The SCP protocol has been largely superseded by the much more flexible SSH File Transfer Protocol (SFTP).

Informations:
Englisch: secure copy protocol - SCP
Updated at: 10.07.2016
#Words: 198
Links: signalling control point (SS7) (SCP), file transfer protocol (FTP), secure shell (SSH), simple file transfer protocol (SFTP), file transfer protocol (FTP)
Translations: DE
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