公开(公告)号：DE2436932A1

公开(公告)日：1975-02-13

申请号：DE2436932

申请日：1974-07-31

Applicant: IBM

Inventor： BELADY LASZLO ANTAL ,  PALERMO FRANK PANTALEONE

IPC: G06F12/08 ,  G06F11/34 ,  G06F12/10 ,  G06F12/12 ,  G06F9/18 ,  G06F13/06

公开(公告)号：DE2615861A1

公开(公告)日：1977-03-10

申请号：DE2615861

申请日：1976-04-10

Applicant: IBM

Inventor： ATTANASIO CLEMENT RICHARD ,  BELADY LASZLO ANTAL

IPC: G06F11/00 ,  G06F21/00 ,  G06F21/22 ,  G07C9/00 ,  G06F11/04

Abstract: An operating system authenticator for determining if an operating system being loaded in a computer is valid. A user's identification code or secret key which is unique to the operating system, and a verifier value which is a predetermined function of a valid operating system and the identification code are respectively stored. A hash function, which is a function of the operating system being loaded and the identification code, is generated by the authenticator. After the operating system is loaded, the hash function is used as an authenticating value and compared with the verifier value for determining the authenticity of the loaded operating system.

公开(公告)号：DE2652869A1

公开(公告)日：1977-06-16

申请号：DE2652869

申请日：1976-11-20

Applicant: IBM

Inventor： BELADY LASZLO ANTAL ,  EVANGELISTI CARLO JOHN

IPC: G06F12/14 ,  G06F11/30 ,  G06F11/34 ,  G06F12/00 ,  G06F21/00 ,  G07C1/00 ,  G06F11/10

Abstract: 1534189 Monitoring storage accesses INTERNATIONAL BUSINESS MACHINES CORP 16 Nov 1976 [4 Dec 1975] 47656/76 Heading G4A A memory 12 or 32 is divided into envelopes 12a-12f or 34 each of which has an associated storage element 18 or 30 in which a time stamp from a clock 20 is recorded each time that envelope is accessed. Time stamp recording is automatic so that by reading the time stamps for particular memory elements a user can determine if any unauthorized access has been made since the last authorized access. Memory 12 may be a random access memory of which time stamp registers 18 form a part. Memory 32 may be a magnetic disc unit having two envelopes 34 and associated time stamp words 30 per track. The arrangement is described in detail in the context of a virtual memory system in which the time stamp registers 18 form an associative memory which is searched by block registers and stores time stamps together with indications as to whether the relevant accesses were for read or write. Any time stamp register 18 can be read by a special instruction FSM which loads the contents of the required register 18 into a specified register in the CPU 10. Each data channel 38 has a corresponding time stamp register 36 which is loaded with a time stamp word 30 whenever a disc envelope is moved via the channel to a memory 12 envelope (the appropriate register 18 and word 30 also time stamped from clock 20). The register 36 contents can be loaded into a specified CPU register by a special instruction FSC. Data envelope transfer between disc 32 and memory 12 takes place serially by word via a shift register buffer.

公开(公告)号：DE2433377A1

公开(公告)日：1975-02-13

申请号：DE2433377

申请日：1974-07-11

Applicant: IBM

Inventor： BELADY LASZLO ANTAL ,  ROTH ROBERT INGERSOLL

IPC: G06F12/12 ,  G06F12/08 ,  G06F9/00 ,  G06F13/06