digital envelope routines

Digital envelope routines are cryptographic algorithms used to securely transmit information over a network. They involve the use of symmetric and asymmetric encryption techniques to ensure that data remains private and cannot be intercepted or tampered with during transmission. In a digital envelope, the message is encrypted using a symmetric encryption key, and the key is then encrypted using an asymmetric encryption key. The receiver can then decrypt the symmetric key using their private key and use it to decrypt the message. This process ensures that only the intended recipient can access the message. Digital envelope routines are commonly used in secure email communication and digital signature applications.