Crypto key generate rsa 2048

A bit key size does provide a reasonable increase in strength over a bit key size but the encryption strength doesn't drop off after bits. There's a significant increase in CPU usage as a result of a bit key size. Hence, it is recommended to use bit keys. RSA Encryption For encryption and decryption, enter the plain text and supply the key.

As the encryption can be done using both the keys, you need to tell the tool about the key type that you have supplied with the help of a radio button. By default, public key is selected. Then, you can use the cipher type to be used for the encryption. If your router already has RSA keys when you issue this command, you will be warned and prompted to replace the existing keys with new keys. Note Before issuing this command, ensure that your router has a hostname and IP domain name configured with the hostname and ip domain-name commands.

You will be unable to complete the crypto key generate rsa command without a hostname and IP domain name. This situation is not true when you only generate a named key pair. For example, if a router's fully qualified domain name FQDN is "router1.

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To generate the keys, select the RSA key size among , , and bit and then click on the button to generate the keys for you. A bit key size does provide a reasonable increase in strength over a bit key size but the encryption strength doesn't drop off after bits. There's a significant increase in CPU usage as a result of a bit key size.

Hence, it is recommended to use bit keys. RSA Encryption For encryption and decryption, enter the plain text and supply the key. As the encryption can be done using both the keys, you need to tell the tool about the key type that you have supplied with the help of a radio button. By default, public key is selected. The largest private RSA key modulus is bits. Therefore, the largest RSA private key a router may generate or import is bits. The recommended modulus for a CA is bits; the recommended modulus for a client is bits.

Additional limitations may apply when RSA keys are generated by cryptographic hardware. Specifying a Storage Location for RSA Keys When you issue the crypto key generate rsa command with the storage devicename : keyword and argument, the RSA keys will be stored on the specified device. This location will supersede any crypto key storage command settings.

If your router has a USB token configured and available, the USB token can be used as cryptographic device in addition to a storage device. Using a USB token as a cryptographic device allows RSA operations such as key generation, signing, and authentication of credentials to be performed on the token. The private key never leaves the USB token and is not exportable. The public key is exportable. RSA keys may be generated on a configured and available USB token, by the use of the on devicename : keyword and argument.