countersigns

Authenticating response words

Countersigns is the plural of countersign and the third-person singular verb form.

A countersign is a secret word or phrase given in response to a password, completing a two-part verification: The guard gave the password; the officer replied with the countersign.

To countersign is to add a second signature to a document, confirming its authenticity or authorizing it: The check required the manager to countersign.

passwords

password

Authentication string

challenge · response · parole · codeword · secret word · shibboleth · keyword · access code · identification · credential

authentication

verification

Proving something accurate

corroboration · endorsement · certification · attestation · ratification · approval · accreditation · authorization · notarization · witnessing

Opposites
authentication action

countersignsrejects

Refuses or discards

refuses · denies · invalidates · disallows · vetoes

challenge-response sequence

countersignschallenges

Difficulties requiring effort

queries · interrogates · passwords · demands · watchwords

document endorsement

countersignsvoids

Emptinesses or nullifies

nullifies · invalidates · strikes · cancels · rescinds

Family

countersign, countersigned, countersigning

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Used worldwide · Timeless · Rated G