Simple method to Encrypt/Decrypt Zip files on Windows

Unfortunately, encrypting a file on Windows with a simple password is not super simple. While Windows does now support other compression formats (RAR, 7-Zip) it does not support encryption for them.

Currently, Windows natively supports the ZipCrypto algorithm. No AES. Note that the ZipCrypto algorithm is not considered secure, and shouldn’t be used for highly confidential data.

The following method, you will need 7-Zip to create the archive, but you won’t need it for decryption as Windows has built in support for ZipCrypto decryption.

To create the archive, you will need 7-Zip installed. Right click on your file/folder -> 7-Zip -> Add to Archive.

You should be presented with a similar window.

Change Archive format to zip
Enter the password
Ensure that the Encryption method is ZipCrypto
Hit OK to create the Archive.

You can now transfer the password protected archive to a new machine. You’ll be prompted for the password when you extract the archive.

Export GPG Private Key

Note that if you need to copy both your Private and Public key, you’ll need to export both separately.

https://stackoverflow.com/questions/5587513/how-to-export-private-secret-asc-key-to-decrypt-gpg-files

List Keys

You can list all the GPG keys with the following command.

gpg --list-keys

Export Key

Change “keyID” to your key idea from the above command. The key ID is the long string of hexadecimal characters.

gpg --export-secret-keys "keyID" > private_key.asc

This will export the keys to private_key.asc. Rename as appropriate.

To export the Public Key

gpg --export "keyID" > public_key.asc

Import Key

To use the key, you’ll need to import and trust the key.

gpg --allow-secret-key-import --import private_key.asc
gpg --edit-key "keyID"

Then type

trust

Select level 5.

Import the Public Key

gpg --import public_key.asc

How To Fix “no matching host key type found. Their offer: ssh-rsa,ssh-dss”

2023 Update: Recent versions of REHL have completely disabled DES which can cause issues even when using the +ssh-rsa or +ssh-rsa. You can use the following command to enable SHA1, however, upgrading the server would be recommended.

update-crypto-policies --set DEFAULT:SHA1

Reason for it not working is some of the older weaker SSH encryption algorithms have been disabled. You can allow ssh to use it by specifying the following option.

 -oHostKeyAlgorithms=+ssh-dss 

The whole command would look like

ssh  -o HostKeyAlgorithms=+ssh-dss root@192.168.111.4 

http://www.openssh.com/legacy.html

https://askubuntu.com/questions/836048/ssh-returns-no-matching-host-key-type-found-their-offer-ssh-dss#836064

Crack LUKS volume with Hashcat

Install hashcat

apt install hashcat

Find LUKS Volume

bob@localhost:~/$ dmesg
...
[ 1057.776074] sd 0:0:0:0: [sda] Write Protect is off
[ 1057.776074] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
[ 1057.776593] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 1057.780234]  sda: sda1
[ 1057.783346] sd 0:0:0:0: [sda] Attached SCSI removable disk
bob@localhost:~/$

From the above we see that the drive we just pluGged into the system is “sda” so our path and partition is “/dev/sda1”

Run hashcat

The following command will run hashcat against “/dev/sda1”, change if the encrypted partition is different. Mode is to brute force every 8 numeric character combination. Refer to the following link to learn more about mask attacks.
https://hashcat.net/wiki/doku.php?id=mask_attack

Note: You should be able to dump the header and work off of that as well.

sudo hashcat -a 3 -m 14600 /dev/sda1 ?d?d?d?d?d?d?d?d