公开(公告)号：US20230315327A1

公开(公告)日：2023-10-05

申请号：US17710717

申请日：2022-03-31

申请人： VMware, Inc.

发明人： Alex Markuze ,  Avishay Yanai ,  Igor Golikov ,  John Manferdelli ,  Ittai Abraham

IPC分类号： G06F3/06

CPC分类号： G06F3/0653 ,  G06F3/0673 ,  G06F3/0604

摘要： In one set of embodiments, a computer system can initiate a memory stress test on a memory subsystem of the computer system, where the memory subsystem including a dynamic random access memory (DRAM). Then, while the memory stress test is running, the computer system can execute a plurality of access operations for accessing the DRAM, measure the time taken to complete each access operation, combine the measured times to compute a value, and output the value as an entropy sample.

公开(公告)号：US20230315916A1

公开(公告)日：2023-10-05

申请号：US17710462

申请日：2022-03-31

申请人： VMware, Inc.

发明人： Alex Markuze ,  Avishay Yanai ,  Igor Golikov ,  John Manferdelli ,  Ittai Abraham

IPC分类号： G06F21/75 ,  G06F7/58

CPC分类号： G06F21/75 ,  G06F7/582

摘要： In one set of embodiments, a computer system can allocate a memory buffer in a dynamic random access memory (DRAM), determine a plurality of DRAM rows covered by the memory buffer, and execute a Rowhammer attack against a target row in the plurality of DRAM rows, thereby yielding randomly flipped bits in one or more neighboring DRAM rows. The computer system can then compute a value based on the randomly flipped bits and output the value as an entropy sample.

公开(公告)号：US20230315392A1

公开(公告)日：2023-10-05

申请号：US17710752

申请日：2022-03-31

申请人： VMware, Inc.

发明人： Alex Markuze ,  Avishay Yanai ,  Igor Golikov ,  John Manferdelli ,  Ittai Abraham

IPC分类号： G06F7/58 ,  G06F9/48

CPC分类号： G06F7/582 ,  G06F9/4806

摘要： In one set of embodiments, a computer system can initialize a counter that is shared by a plurality of software processes, where each software process is programmed to increment the counter a predefined number of times. The computer system can further run the plurality of software processes concurrently. Upon completion of the plurality of software processes, the computer system can apply one or more functions to the shared counter and output the result as an entropy sample.