countersign
Sentry's secret reply
A countersign is a secret word or signal used to verify identity, especially a password given in response to a challenge—as when a sentry demands identification.
The verb means to add a second signature to a document already signed by another, confirming its authenticity or authorization: The check required the treasurer to countersign.
Both senses involve verification through a secondary confirmation.
Jointly guarantee repayment
- witnessOne who attests
- endorseGive official approval
- initialName's opening letter
- subscribeCommit to regular receipt
ratify · authorize · notarize · validate · seal · confirm · dual control · approval
Authentication string
- challengeTest of ability
- responseAnswer to stimulus
- sentryGuard on duty
- watchwordRallying cry or principle
parole · checkpoint · guard · patrol · cipher · identification · handshake · garrison
Authentication string
- verificationProving something accurate
- credentialsEvidence of qualification or identity
- loginAuthentication act or screen
- two-factorAuthentication using paired credentials
PIN · identity · access · token · validation · certificate · authorization · confirm
Concealed from authorities
- covertIntentionally concealed
- undercoverSecretly engaged in espionage
- spyCovert information gatherer
- intelligenceMental ability, cognitive capacity
agent · handler · safehouse · tradecraft · dead drop · operative · infiltrate · rendezvous
cosign
Jointly guarantee repayment
subscribe · ratify · authorize · notarize · validate · seal · confirm · dual control · approval
password
Authentication string
watchword · parole · checkpoint · guard · patrol · cipher · identification · handshake · garrison · verification
password
Authentication string
- verificationProving something accurate
- credentialsEvidence of qualification or identity
- loginAuthentication act or screen
two-factor · PIN · identity · access · token · validation · certificate · authorization · confirm · biometrics
clandestine
Concealed from authorities
- covertIntentionally concealed
- undercoverSecretly engaged in espionage
- spyCovert information gatherer
intelligence · agent · handler · safehouse · tradecraft · dead drop · operative · infiltrate · rendezvous · contact
- approvalsapproved, approve, authorizing, certification, endorsing
- code wordspassword, passphrase, pin code, code name, cipher
- signaturesautograph, John Hancock, initials, mark, flourish
- approvalapprove, approval rating, agree, accept, thumbs-up
- countercountertop, counterbalance, counteract, counterattack, counterpart
- Signingautograph, signature, contract signing, ASL, endorsement
countersignature, countersigned, countersigns, countersigning