END-TO-END ENCRYPTION
LAMBERT M. SURHONE, MARIAM T. TENNOE, SUSAN F. HENSSONOW
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End-to-end encryption (E2EE) encrypts clear (red) data at source with knowledge of the intended recipient, allowing the encrypted (black) data to travel safely through vulnerable channels (eg. public networks) to its recipient where it can be decrypted (assuming the destination shares the necessary key-variables and algorithms).
A classic deployment of E2EE is demonstrated by its use within the Terrestrial Trunked Radio TETRA standard, as defined by the Security Fraud Prevention Group (SFPG) of the Tetra MoU .
In this context E2EE allows security-aware users (eg. police) to retain control over access to their communications.
Unlike TETRA air-interface encryption (an example of Link encryption) users do not have to share key-variables with network operators (eg. 'Airwave', 'A
S.T.R.I.D', 'C2000').
In this way the user traffic (in this case voice or data) travels through the public network encrypted from the transmitting user terminal until it reaches the receiving user terminal where it is decrypted.
