Q1 what does the Bell-lapadula model NOT allow?
1. Subgects to read from a higher level of security relative to their level of security
2. Subjects to read from a lower level of security relative to their level of security
3. Subjects to write to a higher level of security relative to theirlevel of security
4. Subjects to read at their same level of security
which answer? why? give me reason.
Q2 The * (star)property of the Biba model states:
1. Subjects cannot write to a lower level of integrity relative to their level of intergrity.
2. Subjects cannot write to a higher level of integrity relative to their level of intergrity.
3.Subjects cannot read to a lower level of integrity relative to their level of intergrity.
4.Subjects cannot readto a higher level of integrity relative to their level of intergrity.
which answer? why? give me reason.
谢谢
bell为什么同级（高）不能写？有定义？
biba为什么同级（低）不能读？
好像在bell?和bible 并没有这样定义！？？？
QUOTE]最初由 linkenpark 发布
[B]bell:no write down不能往下写
no read up 不能往上读
biba:no write up
no read down [/B][/QUOTE]
