The two companies have agreed to an alliance which will match VeriSign's SecureSeal and Secure Socket Layer (SSL) programmes with buySafe's merchant certifications.
The companies said that combining buySAFE's inspection and bonding services with the transaction protections of SSL and SecureSeal provides a single service to secure the merchant and customer ends of an e-commerce transaction.
"VeriSign's leadership in authenticating and securing web sites now combines with buySAFE's expertise in ensuring confident, fully guaranteed online shopping through bonding," said buySAFE president and chief executive Jeff Grass.
"At a time when consumer confidence is low and online shoppers feel uncertain, the confidence that online merchants can build with VeriSign and buySAFE is invaluable."
The buySAFE partnership is one of several joint campaigns VeriSign has launched with security firms in recent months.
The company inked a deal in June with web security firm Qualys to help stop zero-day attacks on web applications, and teamed up with Airvana in May to develop new security tools for femtocell systems.
Microsoft receives a 30 per cent cut of all purchases on the Xbox digital store
Credit card thieves used Apple ID accounts to buy and sell virtual currency for Clash of Clans and Clash Royale and Marvel Contest of Champions
$5.1bn fine further evidence that the EU is anti-US, claims Trump
New cable will connect Virginia to France