HP Sentry manual ENCRYPTION.KEY Input, THE.KEY Fudge Tastes Good

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Appendix 1 - 2

SENTRY User’s Guide

This is the result of the encryption. If the data string is already encrypted and the encryption key is the same as was used to encrypt the data, the result will be the decrypted data.

ENCRYPTION.KEY (Input)

This is a character string between 10 and 100 characters long that is to be used as the seed for the encryption routine. Do not use a variable key. Use only a constant, hard coded in your program.

DATA ENCRYPTION

One of the ultimate means of securing sensitive data is to encrypt it. Encryption is simply transforming the data according to some code so that it is not intelligible. For example, an encryption technique might be to assign each letter of the alphabet a number according to its position (A = 1, B = 2, C = 3, etc.). Then to encrypt the word "INFORMATION" we transform it to "9 14 6 15 18 13 1 20 9 15 14". Someone who knows the code can decrypt the series of numbers and retrieve the original data.

There are an almost infinite number of encryption techniques. SENTRY uses a method which can be classified as "private key encryption". The encryption subroutine is SENTRY.ENCRYPT. The subroutine

has three arguments -- DATA.STRING, RETURN.STRING and ENCRYPTION.KEY. The ENCRYPTION.KEY may be any string between 10 and 100 characters long. The key is used to uniquely "muddle up" the bits in DATA.STRING. The result is placed into RETURN.STRING. As an example, suppose the key is "OLDSMOBILE" and the input data in DATA.STRING is "SENTRY works great!" The encrypted string in RETURN.STRING might look like "zt>a[H =~3A7-gyI^003W". To decipher the encrypted data, someone would have to know both the encryption algorithm and the key used.

Decryption works like encryption. If we call SENTRY.ENCRYPT with an encrypted string in the argument DATA.STRING and with the same key in ENCRYPTION.KEY that was used to encrypt the data originally, the string returned in RETURN.STRING will be the original, intelligible data.

SENTRY.ENCRYPT will not change any database delimiters (i.e. record mark, text mark, field marks, value marks, subvalue marks) and will not encrypt other characters into delimiters. Hence, it is perfectly safe to write encrypted data into data files.

Examples of BASIC code to store encrypted data and display decrypted data are shown below:

STORE.ENCRYPTED

SENTRY.ENCRYPT = "*SENTRY.ENCRYPT"

INPUT THE.DATA

THE.KEY - "Fudge Tastes Good!"

CALL @SENTRY.ENCRYPT(THE.DATA,

CRYPT.DATA,THE.KEY)

Fitzgerald & Long

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Contents Sentry Page Table Of Contents Page Using this Guide Introduction Sentry User’s Guide Using the Screens Data Entry Conventions Installing Sentry Mv sentry sentry.oldInstall UniVerse … /uv/binUniData … /udt/bin PI/open … /isys/binMain Menu SentryGetting Started Sentry Sentry is currently being run by user nYou must be a super-user to use Sentry Sentry Main MenuIntroduction Introducing the Main Menu Introduction Page Introducing the Database Creation and Validation Menu Database Creation and Valudation Menu Fitzgerald & Long Upload User and Group Profiles from Unix DB.LOADSENTRY.DB.LOAD Batch Create Database from File System Phantom SENTRY.FILE.LOAD BatchValidate the User Profile Database ValidationSentry User’s Guide Fitzgerald & Long Sentry User’s Guide Fitzgerald & Long Page Introducing the Database Maintenance Menu Database Maintenance Fitzgerald & Long System Profile Maintenance Maximum Command Length Maximum Startup Path LengthPasswd File Order Group File Order SYSTEM.MAINTFitzgerald & Long Sentry User’s Guide Fitzgerald & Long Custom User Default Maintenance SUN CUSTOM.USEREnter field number, File or ESC to exit User Maintenance USER.MAINTUID GIDFitzgerald & Long Sentry User’s Guide SUN Enter field number, File or ESC to exit Are you sure you want to delete the entire recordYES/NO? File Ownership ConflictJaf Enter ESC to quit Fitzgerald & Long Group Maintenance GROUP.MAINTDo you want to update the Unix group file Y/N? File Group Conflict Sentry User’s GuideSection 2 Sentry User’s Guide Sysbckup File SystemFILE.MANAGER CURSOR.MAIN View Group Execute XEQ View User RepaintEnter name for cross reference FILE.MAINT Do you want to update ALL files within this Directory also? Read permission w write permission x execute permissionACL.MAINT ALLFitzgerald & Long Sentry User’s Guide More File Manager Views Enter the user name or UID to view @ for X-refFILE.MANAGER Enter the group name or GID to view @ for X-ref Command Maintenance COMMAND.MAINTSENTRY.COMMAND.CONTROL PROC.TEST ProcUse at database prompt only Execute from inside a program only Both use at database prompt and from within a programUnlimited use No useSentry User’s Guide User Item Protection Maintenance USER.ITEM.MAINTSentry User’s GuideSection 2 Sentry User’s Guide Sentry User’s Guide Sentry User’s Guide Introducing the Reports Menu Reports Menu SentryFitzgerald & Long System Profile Report Fitzgerald & Long Sentry User’s Guide Fitzgerald & Long Sentry User’s Guide User Profiles SENTRY.USERS.REPORTSentry User’s Guide Groups Report SENTRY.GROUPS.REPORTSentry User’s Guide Account Protection Report NoneSENTRY.COMMANDS Command Protection Report SENTRY.COMMANDS.REPORTThere are no prompts for this report Access Violations Report SENTRY.VIOLATION.REPORTSentry User’s Guide Introducing the Utilities Menu Utilities Menu DatabaseFitzgerald & Long VOC Protection Setup Account Containing ProtectionPuging the Violations LOG Sentry User’s Guide Password Creation This is the Password Generation data entry screenSentry User’s Guide Fitzgerald & Long Rebuild Cross Reference Files REBUILD.INVERTSUpdate Protected Commands Page Sentry Internal Subroutines Sample Call @SENTRY.ENCRYPTDATA.STRING, RETURN.STRINGDATA.STRING Input RETURN.STRING OutputENCRYPTION.KEY Input THE.KEY Fudge Tastes GoodSubroutine SENTRY.USER.ITEM.CONTROL THE.KEY = Fudge Tastes GoodACCESS.RIGHTS Output ERROR.TEXT OutputUSER.ITEM Input ITEM.FOUND OutputAppendix 1 Subroutine SENTRY.VIOLATION.STAMP Comment InputAppendix 1 Page Sentry KEY Bindings Appendix 2 Sentry User’s Guide Appendix 2

Sentry specifications

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