Biba Integrity Model

• Supplements Bell-La Padula with:

• Simple Integrity Property: Subject s can modify object o obly if I(s)>=I(o)

• Integrity *-property: If subject s has read access to object o with integrity level I(o), s can have write access to object p only if I(o)>=I(p)

• Prevents degradation of integrity through untrustworthy sources or information.

Notes: