link encryption

(′liŋk en′krip·shən)

(communications) The application of on-line crypto-operation to the individual links of relay systems so that all messages passing over the link are encrypted in their entirety.

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Computer Desktop Encyclopedia: link encryption

The decryption and re-encryption of confidential data at various router or switching junctions throughout the transmission path. For example, a transmission from Boston to Phoenix is encrypted in Boston, decrypted in Atlanta, re-encrypted (perhaps with a different algorithm) in Atlanta and decrypted in Phoenix. Link encryption creates a greater risk of a security breach. Contrast with end-to-end encryption.

Military Dictionary: link encryption

(DOD) The application of online crypto-operation to a link of a communications system so that all information passing over the link is encrypted in its entirety.

Wikipedia: Link encryption

Link encryption is an approach to communications security that encrypts and decrypts all traffic at each end of a communications line (e.g. a teletype circuit). It contrasts with end-to-end encryption where messages are encrypted by the sender at the point of origin and only decrypted by the intended receiver. Link encryption offers a couple of advantages:

encryption is automatic so there is less opportunity for human error.
if the communications link operates continuously and carries an unvarying level of traffic, link encryption defeats traffic analysis.

On the other hand, end-to-end encryption ensures only authorized persons see the plaintext.

Link encryption can be used with end-to-end systems by superencrypting the messages.

Bulk encryption refers to encrypting a large number of circuits at once, after they have been multiplexed.

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Copyrights:

		Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved. Read more
		Computer Desktop Encyclopedia. THIS COPYRIGHTED DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher. © 1981-2008 Computer Language Company Inc. All rights reserved. Read more
		Military Dictionary. US Department of Defense Dictionary of Military and Associated Words, 2003. Read more
		Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Link encryption". Read more

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