1 Exhibit 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 2-96564, 33-10035, 33-41709, 33-79772 and 333-46365) of Datum Inc. of our report dated September 9, 1999 related to the financial statements of Digital Delivery, Inc. appearing on page F-2 of this Form 8-K. /s/ PRICEWATERHOUSECOOPERS LLP - ------------------------------ PricewaterhouseCoopers LLP Boston, Massachusetts October 8, 1999