STOCKHOLM--(BUSINESS WIRE)--Clavister (STO:CLAV) has secured debt financing of EUR 4 million from Harbert European Growth Capital Fund ("HEGCF") Clavister (Nasdaq: CLAV), a leader in high-performance network security, has secured debt financing of EUR 4 million from Harbert European Growth Capital Fund ("HEGCF"), an investor in fast growing European technology, life science and clean energy businesses. The funding is split into two equal parts, where the second part is payable given certain con