Fandom

The IT Law Wiki

Shared symmetric key

32,167pages on
this wiki
Add New Page
Talk0 Share

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Definition Edit

In a shared symmetric key approach, the user signs a document and verifies the signature using a single key (consisting of a long string of zeros and ones) that is not publicly known, or is secret.

Overview Edit

Since the same key does these two functions (signature and verification), it must be transferred from the signer to the recipient of the message. This situation can undermine confidence in the authentication of the user's identity because the symmetric key is shared between sender and recipient and therefore is no longer unique to one person. Since the symmetric key is shared between the sender and possibly many recipients, it is not private to the sender and hence has lesser value as an authentication mechanism.

This approach offers no additional cryptographic strength over digital signatures. Further, digital signatures avoid the need for the shared secret.

Source Edit

Also on Fandom

Random Wiki