The document outlines the differences between encoding, encryption, and hashing, highlighting their purposes and characteristics. Encoding transforms data for compatibility, encryption secures data using keys, and hashing creates fixed-length, tamper-proof representations of data. It also discusses the importance of using 'salt' in password hashing to enhance security.

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Encoding
vs
Encryptio
n
vs
Hashing

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• Transforms data format to
be consumed by other
systems.
• Also used to reduce size of
the file.
• Not suitable for data
security.
• The algorithm used to
encode is also used to
decode.
• Examples - ASCII, Base64
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Encoding

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• To store/transfer confidential
data.
• The data is transformed into
an unreadable format to
avoid data manipulation.
• Only the authorized parties
having the decryption key
can access the file.
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Encryption

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There's :
• Symmetric encryption - the
sender (for encryption) and
receiver (for decryption) possess
the same key
• Asymmetric encryption - involves
two different keys, public key and
private key
• Example - Your email id is your
public key (known to all), your
password is your private key
(confidential)
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Encryption

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• Takes data of any format/size
and produces a fixed length
hash.
• Data once hashed is non-
reversible.
• Two identical messages produce
the same hash value.
• Any slight change in data leads
to an entirely new hash value.
Thus, data becomes
tamperproof.
• Example - SHA256, MD5,
passwords stored in databases
Hashing

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• Same passwords produce same
hash on encryption.
• If one password is revealed
using brute-force technique
(guessing/trial-error method),
all the accounts with the same
password will get
compromised.
• Hence, random bits, known as
salt, is added to the password
to manipulate the hash value
before storing it in the
database.
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'Salt'

7. Thank you
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Watch
THE
IMITATIO
N
GAME
World's first computer, invented by Alan Turing to decipher the
German Enigma code during Nazi war.
starring
Benedict Cumberbatch