公开(公告)号：EP3198506A4

公开(公告)日：2018-05-30

申请号：EP15844964

申请日：2015-08-26

申请人： MCAFEE LLC

发明人： CROWE SIMON

IPC分类号： G06F21/54 ,  G06F21/52 ,  G06F21/56

CPC分类号： G06F21/54 ,  G06F2221/033

摘要： In an example, a stack protection engine is disclosed for preventing or ameliorating stack corruption attacks. The stack protection engine may operate transparently to user-space processes. After a call to a subroutine from a parent routine, the stack protection engine encodes the return address on the stack, such as with an exclusive or cipher and a key selected from a key array. After the subroutine returns control to the main routine, the stack protection engine decodes the address, and returns control. If a stack corruption attack occurs, the malicious return address is not properly encoded, so that when decoding occurs, the program may simply crash rather than returning control to the malicious code.

公开(公告)号：EP3127016A4

公开(公告)日：2017-11-15

申请号：EP15772946

申请日：2015-03-23

申请人： MCAFEE LLC

发明人： MUTTIK IGOR ,  CROWE SIMON ,  SILBER JOEL ,  PEARCE STEPHEN ,  HEARNDEN STEPHEN

IPC分类号： G06F17/30 ,  G01S19/01 ,  H04L9/08 ,  H04L9/32 ,  H04W4/02 ,  H04W12/06 ,  H04W64/00

CPC分类号： H04W4/021 ,  H04L9/0872 ,  H04L9/0891 ,  H04L9/3247 ,  H04L9/3265 ,  H04L2209/38 ,  H04L2209/80 ,  H04W12/06

摘要： A geo-location provider station signs geo-location data and a previous signature provided by a mobile device, returning a new signature to the mobile device. The mobile device uses the new signature when requesting a signature from another geo-location provider station. The mobile device stores the geo-location data and the signatures provided by geo-location provider stations. The stored geo-location data may be verified upon request by using the stored signature data.