File transfer methods

 FTP refers to the File Transfer Protocol, one of the
protocols within the TCP/IP protocol suite used on the
Internet. The File Transfer Protocol makes it possible to
transfer files from one computer (or host) on the
Internet to another.
 A user of an FTP program must log in to both hosts in
order to transfer a file from one to the other.

 To promote sharing of files (computer
programs and/or data)
 To encourage indirect or implicit use of remote
computers (via programs)
 To shield a user from variations in file storage
systems among hosts
 To transfer data reliably and efficiently

 Manual File Transfer
 File Transfer via e-mail
 File Transfer via HTTP
 File Transfer via Anonymous/WU-FTP
 File Transfer via SFTP / SCP

 Through Floppy Disk.
 Through CD/DVD
 Through Tape
 Through Zip Drive
 Through USB Drives
 Through Hard disk.

 Incompatibility of Media
 Limited capacity of Media
 If the media is lost, misplaced or damaged the
data is gone. If lost or misplaced, the data could
be readily accessible to the finder.
 Physical Access of source and destination
systems are required.

 Even though it is an old method of file transfer it is
very secure through the trustees.
 Since the data is not transferred through the wire there
is no possibility of cyber attack like (Packet sniffing,
Man in the middle, hijacking, eavesdropping on the
network, etc.)
 This can be very useful for top secret data transfer.

 Mostly insecure unless the data is specifically encrypted.
 Requires third party mail server where copy of information is
stored.
 Very high probability of delivery to unintended recipients or
getting lost on the network.
 No control over destination directory. Require user intervention to
store the document to a specific folder
 Highly vulnerable to man in the middle attack or session hijacking
attack.
 Extremely common and preferred method of spreading viruses.
 Severe limitation on the size and number of files being
transferred.

 Very easy and economical way to transfer files. Even
non technical users can easily transfer files.
 Files can be sent in an encrypted manner if needed.
 As compared to manual method of file transfer this
method is extremely fast.
 If the data is not confidential then this is the best way
to transfer between personal users.

 Anonymous FTP is a means by which archive sites
allow general access to their archives of information.
 These sites create a special account called "anonymous“
or “ftp”.
 User "anonymous" has limited access rights to the
archive host, as well as some operating restrictions.
 Generally, the only operations allowed are logging in
using FTP, accessing and listing the contents of a
limited set of directories, storing and retrieving files.

 The user name and password are universally known.
 When connecting to the FTP server the sent data can be
’kidnapped’ to a foreign computer with the result that
they will never arrive at the specified target computer.
 From the foreign computer data can be transferred to
the actual computer as well as existing data can be
viewed and edited. This can be a great danger for
companies transferring inhouse information!

 This method satisfies the diverse needs of a
large population of users with a simple, and
easily implemented protocol design.
 Anonymous FTP can be a valuable service if
correctly configured and administered.

 Login Authorization : The basic FTP protocol
does not have a concept of authentication.
 Data Channel Encapsulation : Data transferred
is directly visible.

 More affectionately known as WU-FTPD ,
Developed by Washington University.
 WU-FTPD is the most popular ftp daemon on
the Internet, used on many anonymous ftp sites
all around the world.

 The username and password are still sent in
clear text and it is easy to steal the password.
 Data is also transmitted in clear text and highly
vulnerable to man in the middle attack.

 Allows user authentication through distinct
user name and password.
 You can define the role of the user on a
particular folder of a particular server / host.

 SFTP stands for ‘Secure File Transfer Protocol’.
The Secure File Transfer Protocol provides
secure file transfer functionality over any
reliable data stream. It uses SSH.

 SFTP protocol runs on secure channel.
 Encrypts all traffic (including passwords) to
effectively.
 Provides variety of authentication methods.
 It can be automated by public and private key
authentication.

 SFTP protocol is designed to provide primarily
file transfer, but it also provides general file
system access on the remote server - in a secure
manner.
 Can be intentionally misused

File transfer methods

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File transfer methods