с английским надо в предложения обвести суффиксы:
1. Anonymous P2P is desirable and in some cases necessary to ensure freedom of speech and the free flow of information. 2. A sufficiently detailed protocol includes details about data struc- tures and representations, at which point it can be used to implement multiple, interoperable versions of a program. 3. A cryptographic protocol has an entity authentication mecha- nism, based on the X.509 system. 4. A wide variety of cryptographic protocols go beyond the tradi- tional goals of data confidentiality, integrity, and authentication to also secure a variety of other desired characteristics of computer-mediated collaboration.

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