公开(公告)号：GB2594905A

公开(公告)日：2021-11-10

申请号：GB202113007

申请日：2020-03-06

Applicant: IBM

Inventor： JONATHAN DAVID BRADBURY ,  CHRISTIAN BORNTRAEGER ,  HEIKO CARSTENS ,  MARTIN SCHWIDEFSKY ,  REINHARD THEODOR BUENDGEN

IPC: G06F12/00 ,  G06F9/455 ,  G06F12/14 ,  G06F21/78 ,  H04L9/08 ,  H04L9/32

Abstract: According to one or more embodiments of the present invention, a computer implemented method includes computing a hash value of a page of memory of a computer system and comparing the hash value with a previously computed hash value of the page. A per-encryption value per page can be used in encrypting the page based on determining that the hash value matches the previously computed hash value. A modified value of the per-encryption value per page can be used in encrypting the page based on determining that the hash value mismatches the previously computed hash value.

公开(公告)号：GB2594905B

公开(公告)日：2022-04-20

申请号：GB202113007

申请日：2020-03-06

Applicant: IBM

Inventor： JONATHAN DAVID BRADBURY ,  CHRISTIAN BORNTRAEGER ,  HEIKO CARSTENS ,  MARTIN SCHWIDEFSKY ,  REINHARD THEODOR BUENDGEN

IPC: G06F12/00 ,  G06F9/455 ,  G06F12/14 ,  G06F21/78 ,  H04L9/08 ,  H04L9/32

Abstract: According to one or more embodiments of the present invention, a computer implemented method includes computing a hash value of a page of memory of a computer system and comparing the hash value with a previously computed hash value of the page. A per-encryption value per page can be used in encrypting the page based on determining that the hash value matches the previously computed hash value. A modified value of the per-encryption value per page can be used in encrypting the page based on determining that the hash value mismatches the previously computed hash value.

公开(公告)号：GB2596012B

公开(公告)日：2023-01-11

申请号：GB202113069

申请日：2020-03-06

Applicant: IBM

Inventor： JONATHAN BRADBURY ,  MARTIN SCHWIDEFSKY ,  CHRISTIAN BORNTRAEGER ,  LISA CRANTON HELLER ,  HEIKO CARSTENS ,  FADI BUSABA

IPC: G06F21/60 ,  G06F12/14

Abstract: An example computer-implemented method includes presenting, by a hardware control of a computing system, an exception to an untrusted entity when the untrusted entity accesses a secure page stored in a memory of the computing system, the exception preventing the untrusted entity from accessing the secure page. The method further includes, in response to the exception, issuing, by the untrusted entity, an export call routine. The method further includes executing, by a secure interface control of the computing system, the export call routine.

公开(公告)号：GB2596012A

公开(公告)日：2021-12-15

申请号：GB202113069

申请日：2020-03-06

Applicant: IBM

Inventor： JONATHAN BRADBURY ,  MARTIN SCHWIDEFSKY ,  CHRISTIAN BORNTRAEGER ,  LISA CRANTON HELLER ,  HEIKO CARSTENS ,  FADI BUSABA

IPC: G06F21/57

Abstract: An example computer-implemented method includes presenting, by a hardware control of a computing system, an exception to an untrusted entity when the untrusted entity access a secure page stored in a memory of the computing system, the exception preventing the untrusted entity from accessing the secure page. The method further includes, in response to the exception, issuing, by the untrusted entity, an export call routine. The method further includes executing, by a secure interface control of the computing system, the export call routine.