Using openssl


 
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Old 03-14-2011
I'd say ftp is always insecure like rcp, telnet but scp, sftp and ftps all use secure socket layer that comes in open ssl. It is the plain text unencrypted on the tcp layer that is insecure. The ssl slips in encryption and sometimes pre-compression, which is secure.
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VERSION(1SSL)                                                         OpenSSL                                                        VERSION(1SSL)

NAME
openssl-version, version - print OpenSSL version information SYNOPSIS
openssl version [-help] [-a] [-v] [-b] [-o] [-f] [-p] [-d] [-e] DESCRIPTION
This command is used to print out version information about OpenSSL. OPTIONS
-help Print out a usage message. -a All information, this is the same as setting all the other flags. -v The current OpenSSL version. -b The date the current version of OpenSSL was built. -o Option information: various options set when the library was built. -f Compilation flags. -p Platform setting. -d OPENSSLDIR setting. -e ENGINESDIR setting. NOTES
The output of openssl version -a would typically be used when sending in a bug report. COPYRIGHT
Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 1.1.1a 2018-12-18 VERSION(1SSL)