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How does one write to (and read from) bios without using typical bios menus?

By tomscotto
Dec 18, 2007
  1. we are trying to do a rather off-the-wall thing. the big picture: we have classified data that we want to encrypt on all writable partitions on our hard drive(s). we need to store the encryption/decryption "keys" - two redundant 32 byte entries - for this data external to these drives. one place we thought of was in bios. these keys will be used for every read/write from/to the hard drives, so we would like them be be accessible in the lower part of ram like all other bios data is after bootup (if possible). the keys may need to be changed sometimes at boot-up by a third party application and NOT by entering the standard bios menus, which may be the trickiest part. is any of this at all possible?
    thanks!
    t.
     
  2. Nodsu

    Nodsu TS Rookie Posts: 5,837   +6

    Sure it is, but why do it the hard way? (You would have to rewrite the operating system kernel/drivers to do this unless you are using DOS or something)

    There are industry standard solutions like TPM chips on motherboards, smart cards, security tokens, pinpads, hardware hard drive encryption devices..
     
  3. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    seagate now makes encryption hard drives
    and ya if you do a bios write it's possible to lock drive
    do search for bios flash writer or something like that
    I have some type on one of my drives some where to re-write bios
    came with developer board from Intel
    buy some spare chips yer going to need them
     
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