| 摘要 |
FIELD: information technology.SUBSTANCE: method comprises steps of selecting an arbitrary duration T for successive crypto-periods; replacing the current encryption key TEKwith a new key TEKat the end of each crypto-period using a synchroniser; encrypting successive segments PK through TEK, wherein each Pbegins at the corresponding time t; the generator generating a packet S, the duration of reception of which is shorter than the duration of reproducing P, wherein Sincludes an encrypted Pand a cryptogram of each TEK, used to encrypt P, wherein the step of replacing TEKwith TEKfor encrypting Pis delayed until a time t+Tor is postponed to tin response to the exchange of a synchronisation signal between the generator and the synchroniser, wherein duration of Tis greater than or equal to the time required by the receiver to decrypt the crytogram TEK, included in S, and is strictly less than a selected T.EFFECT: preventing delays when reproducing an encrypted K.9 cl, 7 dwg |
