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Introduction to Perfect Forward Secrecy

Background

The idea of ‘Perfect Forward Secrecy’, or sometimes simply ‘Forward Secrecy’, is that something that in encrypted and so considered ‘secret’ now, should remain encrypted and so not easier discovered in the future. If there is a means whereby the ‘secret’ can be revealed in the future, then there is no ‘forward secrecy’, meaning that while the information may be protected now, it may not be at some future point in time.