Системы шифрования данных, передава

Системы шифрования данных, передаваемых по сетям.
Различают оконечное(абонентское) шифрование два основных способа шифрования: канальное шифрование и оконечное(абонентское) шифрование.
В случае канального шифрования защищается вся информация, передаваемая по каналу связи, включая служебную. Этот способ шифрования обладает следующим достоинством - встраивание процедур шифрования на канальный уровень позволяет использовать аппаратные средства, что способствует повышению производительности системы. Однако у данного подхода имеются и существенные недостатки:
Шифрование служебных данных осложняет механизм маршрутизации сетевых пакетов и требует расшифрования данных в устройствах промежуточной коммуникации (шлюзах, ретрансляторах и т. п.);
Шифрование служебной информации может привести к появлению статически закономерностей в шифрованных данных, что влияет на надежность защиты и накладывает ограничения на использование криптографических алгоритмов.
Оконечное(абонентское) шифрование позволяет обеспечить конфиденциальность данных, передаваемых между двумя абонентами. В этом случае защищается только содержание сообщений, вся служебная информация остается открытой. Недостатком является возможность анализировать информацию о структуре обмена сообщениями, например об отправителе и получателе, о времени и условиях передачи данных, а также об объеме передаваемых данных.

Results (English) 1:

Encryption of data transmitted over networks.Distinguish the target (subscription) encryption of two basic methods of encryption: channel encryption and target (subscription) encryption.In the case of channel encryption protected by all information transmitted over a communications channel, including performance. This encryption method has the following merit-embedding procedures link layer encryption allows you to use hardware that enhances system performance. However, this approach has significant disadvantages:Encryption overhead has complicated the routing of network packets and requires decryption of data in intermediate devices of communication (gateways, relays, etc.);Encryption of sensitive information may lead to the emergence of statically encrypted data patterns that affect the reliability of protection and imposes restrictions on the use of cryptographic algorithms.Target (subscription) encryption helps ensure privacy of data transmitted between two subscribers. In this case, protected only the content of the messages, all confidential information remains open. The downside is the ability to analyse information on the structure of the messaging, for example about the sender and recipient, the time and conditions of transfer of data, as well as on the amount of transmitted data.

Results (English) 2:

Encryption of data transmitted over networks.
There are terminal (subscriber) encryption are two main ways of encryption: encryption channel and terminal (subscriber) encryption.
In the case of link encryption protects all information transmitted over the communication channel, including service. This encryption method has the following advantages - embedding procedures to the link layer encryption allows you to use the hardware, thereby increasing system performance. However, this approach has significant drawbacks:
encryption overhead complicated mechanism of routing network packets and requires decryption of data in devices intermediate communication (gateways, repeaters, and so on. N.)
The encryption overhead can cause static patterns in the encrypted data that It affects the reliability of the protection and imposes restrictions on the use of cryptographic algorithms.
The terminal (subscriber) encryption ensures the confidentiality of data transmitted between two subscribers. In this case, only protects the content of messages, all service information remains open. The disadvantage is the ability to analyze information on the structure of messaging, such as the sender and recipient, the time and the conditions of the data, as well as on the volume of data transmitted.

Results (English) 3:

encryption of data transmitted in the network terminal (subscription).
there are two major ways of encryption: the encryption channel encryption and terminal (subscription) encryption.in the case of channel encryption protects all information transmitted on the channel, including performance.this method has the following advantage of embedding the encryption procedures, encryption on the data link layer can use hardware that improves the system performance.however, this approach has significant drawbacks:
encryption of data complicates the routing network packets and requires расшифрования data via communication devices (locks, ретрансляторах etc. w;
the encryption service information may lead to the emergence of static patterns in the encrypted data, which affects the reliability of protection and impose restrictions on the use of cryptographic algorithms.
terminal (subscription) encryption ensures the privacy of data transmitted between the two subscribers. in this case, is only the content of communicationsall sensitive information remains open. the main drawback is the possibility of analysing information on the structure of communications, for example of the sender and the recipient, the time and conditions of data transmissionand also on the amount of transmitted data.