# Encryption

Encrypting the data or files before a transfer is often necessary to prevent the data from being read if intercepted in transit

## Windows

```powershell-session
PS C:\htb> Import-Module .\Invoke-AESEncryption.ps1
```

```powershell-session
PS C:\htb> Invoke-AESEncryption -Mode Encrypt -Key "p4ssw0rd" -Path .\scan-results.txt

File encrypted to C:\htb\scan-results.txt.aes
PS C:\htb> ls

    Directory: C:\htb

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----        11/18/2020  12:17 AM           9734 Invoke-AESEncryption.ps1
-a----        11/18/2020  12:19 PM           1724 scan-results.txt
-a----        11/18/2020  12:20 PM           3448 scan-results.txt.aes
```

## Linux

1. Encrypt

```shell-session
$ openssl enc -aes256 -iter 100000 -pbkdf2 -in /etc/passwd -out passwd.enc
```

2. Decrypt

```shell-session
$ openssl enc -d -aes256 -iter 100000 -pbkdf2 -in passwd.enc -out passwd 
```

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<figure><img src="/files/a876wNYE568SJIfTZVxL" alt=""><figcaption></figcaption></figure>


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