How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux

How To Encrypt And Decrypt Files Using Private Public Keys With OpenSSL On Ubuntu Linux.

This video tutorial will show you how to use the openssl command line to encrypt and decrypt a file using a public key. We will first generate a private key then extract the public key from this private key.
last we will encrypt a file using the public key and later use the corresponding private key to decrypt it.

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[osterpenpen]

1) I prefer to use ssh-keygen to create RSA keys, as I find the syntax to be simpler to use.
2) "You cannot encrypt files larger than the key length?" What? Sure you can. 2048 bits is 256 bytes. I guarantee that a 2048-bit key can encrypt files larger than 1/4 MB.
3) What are the advantages of using openssl for this, as opposed to another tool such as GPG?

[josiahv]

at 6:55 its openssl "rsautl" in the yellow text, not "rsault", good stuff though.

[Sleeperknot]

Great video. I have one question - For an https website, first the client will create a symmetric key using the public key of the server and will send it over to the server, and server will decrypt it using the private key and then using this decrypted symmetric key, the whole session will be encypted. Can you please throw some light onto how ssldump can decrypt say https response bodies in this context? (Assming that there's already an MITM proxy running in transparent mode, and we are talking about the client to proxy communication only - we will have the private key)

[hassaniyouness]

Are you a Moroccan guy ? hahaha thanks for the explanation

[researcherobserver]

Hi. Kindly help me to decrypt ransomware file which has extension of vari

[Carmineo]

Muchas gracias!
Me ayudaste mucho con mi tarea.

[abdulloh]

Is it possible to decrypt the encryption of the proprietary phone files?

[avneeshgupta]

Bro I have encrypted video .Gem and I have its encryption key too then can You please tell me the way to undo it into mp4 again🙏🏻