MPPE (Microsoft Point-to-Point Encryption)
MPPE (Microsoft Point-to-Point Encryption) is a method of encrypting data transferred across Point-to-Point Protocol (PPP)-based dial-up connections or Point-to-Point Tunneling Protocol (PPTP) virtual private network (VPN) connections. MPPE uses the RSA algorithm for encryption and supports 40-bit and 128-bit session keys, which are changed frequently to ensure security. MPPE does not compress or expand data.