Comments on: Symmetric Encryption https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/ Networking presented simply, practically, and applicably Tue, 02 Feb 2021 02:27:13 +0000 hourly 1 By: Ed Harmoush https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/#comment-227384 Tue, 02 Feb 2021 02:27:13 +0000 http://www.practicalnetworking.net/?p=80#comment-227384 In reply to gidify.

Correct, the listed algorithms are not hashing algorithms.

The different is hashing algorithms can not be “decrypted”, they are one way operations. “Encryption” without the ability to decrypt the content does not help solve the problem of Confidentiality.

Hope this helps.

]]> By: gidify https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/#comment-227220 Mon, 01 Feb 2021 15:04:22 +0000 http://www.practicalnetworking.net/?p=80#comment-227220 In reply to gidify.

Mispelling on the 3rd line. Should read …”only use HASH functions…”

]]> By: gidify https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/#comment-227219 Mon, 01 Feb 2021 15:02:26 +0000 http://www.practicalnetworking.net/?p=80#comment-227219 Since the output of the above name symmetric encryption algorithms are variable in length, and since hash algorithms outputs are always of the same length, I would conclude that these listed symmetric algorithms are not hash algorithms, correct? If so, then why wouldn’t programmers only use has functions as this would allow even asymmetric functions to output a standard length string, and thereby eliminate the drawback of increased output length?

]]> By: Ed Harmoush https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/#comment-75399 Wed, 13 Jun 2018 22:00:31 +0000 http://www.practicalnetworking.net/?p=80#comment-75399 In reply to Hamza Saeed.

Then it isn’t “Cryptographic Encryption” which requires the usage of a key. It is merely an obfuscation of the original message.

The problem with doing encryption with a Key is that it is difficult to come up with a secure method of transforming Plain text into Cipher text. If you DO come up with a way, you have to come up with a new way for every person you speak with (otherwise, each person will be able to decrypt the messages you send to the other).

A modern encryption algorithm involves math that has been vetted by professional mathematicians and cryptographers in combination with some sort of secret key. People like us (non-cryptographers) can simply use a commonly approved algorithm, and then generate a new key for each session we wish to secure.

]]> By: Hamza Saeed https://www.practicalnetworking.net/series/cryptography/symmetric-encryption/#comment-75375 Wed, 13 Jun 2018 19:33:32 +0000 http://www.practicalnetworking.net/?p=80#comment-75375 what if we only decrypt the data & we don’t have any secret key ….Is that possible ?Please reply

]]>