Ahmed Seif el-Islam, a defence lawyer, criticised the sentences as being "unjust".
Eleven Israelis were killed and more than 100 people wounded in the bombings, which destroyed a wing of the Taba Hilton hotel in October 2004.
The blasts included the explosion of a vehicle at Ras Shitan, a Red Sea resort south of Taba.
In state security courts, the accused do not have the right of appeal. They may appeal only to Hosni Mubarak, the Egyptian president, for clemency.