Repurchaseagreement (also known as a repo or Sale and Repurchase agreement) allows a borrower to use a financialsecurityas collateral for a cash loanat a fixed rate of interest.
But if the money were to come from the EFSF, well in those circumstances Finland has said it would fear that the money would be too much at risk of loss - so it is demanding collateral or security for its share of any such loan.