Countersign in a sentence as a noun

When you do that, the old key will sign your newly generated key, and the new key will countersign.

Depending on how much jitter there is in the time it takes to countersign the challenge, RTT might be one way.

Our notaries glance at your ID before they countersign a document.

Landlord usually has to countersign lease agreement so attach copies of said things to lease.

Countersign in a sentence as a verb

So they would sign their releases and after a careful review the original author would countersign stating that he checked and approves these changes.

Remember folks, if code signing, countersign with a timestamping service[1] so when your code signing cert expires, your older signed code will still work.

I learned well before leaving undergrad that you can edit legal documents before signing them, and if they countersign, then they agreed to your document.

That reminds me of the rock-paper-scissors robot from a while ago that always "wins" by watching the human hand to see what sign they are throwing, then throwing the countersign faster.

Countersign definitions

noun

a secret word or phrase known only to a restricted group; "he forgot the password"

See also: password watchword word parole

noun

a second confirming signature endorsing a document already signed

See also: countersignature

verb

add one's signature to after another's to attest authenticity; "You must countersign on this line of the contract"