The most widely adopted protocol that leverages Triple DES encryption to ensure data confidentiality is ESP, short for “Encapsulating/Encapsulated Security Payload.”
Along with the Authentication Header (AH), ESP is the other possible process identified by the security protocol ID determined as part of Security Association (SA) that’s a mandatory requirement for the establishment of an IPSec connection – and thus VPN service.
ESP uses IP protocol number 50 and ultimately ensures not just data confidentiality – of which 3DES is a big part of – but also an anti-replay service allowing for partial sequence integrity. It’s dependable, beautifully redundant in its approach to security, and highly versatile, which does wonders for its practicality.
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