Step 1 : Enter the input text to be encrypted in the 'Plaintext' area and generate hash value for message by clicking on the SHA-1 button

Step 2 : Copy content of Hash Output(hex) field and paste it in Input to RSA(hex) field.

Step 3 : Select keysize of public key from RSA Public key section by clicking on any key button.

Step 4 : Click on Apply RSA button to generate a digital signature.