Access control system with authorized and by means of a portable storage medium renewable hours regions

摘要

PCT No. PCT/FR95/00935 Sec. 371 Date Mar. 7, 1996 Sec. 102(e) Date Mar. 7, 1996 PCT Filed Jul. 11, 1995 PCT Pub. No. WO96/02899 PCT Pub. Date Feb. 1, 1996The invention relates to systems for checking access limited to authorized time slots renewable by means of a portable storage device. The system comprises, for this purpose, an element (LE) producing electronic keys formed by a data element pertaining to a time slot and by the signature of this data element. These keys are loaded into devices such as memory cards (C). Electronic locks (L) capable of verifying the signatures are implanted in the different (physical or logical) locations, the access to which has to be guarded. Application to the checking of access to buildings or computer systems.