You may generate an RSA private key with the help of this tool. Additionally, it will display the public key of a generated or pasted private key.
In order to provide a public key, each user in your system must generate one if they don’t already have one. This process is similar across all operating systems. First, you should check to make sure you don’t already have a key. By default, a user’s SSH keys are stored in that user’s /.ssh directory. However, you can follow the same process to use a private key when using any terminal software on Linux. Note: For information about using Secure Shell (SSH) private keys on Microsoft® Windows® operating systems, see Logging in with an SSH Private Key on Windows and Generate RSA keys with SSH by using PuTTYgen. Add your SSH private key to the ssh-agent. If you created your key with a different name, or if you are adding an existing key that has a different name, replace idrsa in the command with the name of your private key file. $ ssh-add /.ssh/idrsa; Add the SSH key to your GitHub account. Generating an RSA Private Key. Generating a private key can be done in a variety of different ways depending on the type of key, algorithm, bits, and other options your specific use case may require. In this example, we are generating a private key using RSA and a key size of 2048 bits. $ openssl genpkey -algorithm RSA -pkeyopt rsakeygenbits. To Generate an SSH key in Windows 10, Open a new command prompt. Type ssh-keygen and hit the Enter key. The app will ask for the save location, offering C:usersyour user name.sshidrsa by default. Next, you will be prompted to enter a passphrase. You can just hit the Enter key to skip it. Finally, you will see the fingerprint for your key.
Description
RSA is an asymmetric encryption algorithm. With a given key pair, data that is encrypted with one key can only be decrypted by the other. This is useful for encrypting data between a large number of parties; only one key pair per person need exist. RSA is widely used across the internet with HTTPS.
To generate a key pair, select the bit length of your key pair and click Generate key pair. Depending on length, your browser may take a long time to generate the key pair. A 1024-bit key will usually be ready instantly, while a 4096-bit key may take up to several minutes. For a faster and more secure method, see Do It Yourself below.
CryptoTools.net does not yet have a tool for facilitating the encryption and decryption of data using RSA, but you may Do It Yourself with the instructions below.
Do It Yourself
For these steps, you will need a command line shell with OpenSSL. Ideally, you should have a private key of your own and a public key from someone else. For demonstration, we will only use a single key pair.
Generate Private Key
Run this command to generate a 4096-bit private key and output it to the private.pem file. If you like, you may change the key length and/or output file.
Derive Public Key
Given a private key, you may derive its public key and output it to public.pem using this command. (You may also paste your OpenSSL-generated private key into the form above to get its public key.)
Encrypt Data
We can now use this key pair to encrypt and decrypt a file, data.txt.
Generate Rsa Key Pair
Decrypt Data
Generate Rsa Public Key
Given the encrypted file from the previous step, you may decrypt it like so.