”Vi dör ut. Ack, så tragiskt. Ack, så roligt.”

Participant Intention - to - Commit Ack

The implicit yes{vote commit protocol (IYV), proposed for future gigabit{networked distributed databases, reduces the time required to commit a distributed transaction at the expense of independent recovery of failed participant sites. In this paper, we propose a novel coordination scheme for IYV that reduces the window of vulnerability to blocking and minimizes the time required for the sites ...

The ACK Modula-2 Compiler

TCP Ack Storm DoS Attacks

We present Ack-storm DoS attacks, a new family of DoS attacks exploiting a subtle design flaw in the core TCP specifications. The attacks can be launched by a very weak MitM attacker, which can only eavesdrop occasionally and spoof packets (a Weakling in the Middle (WitM)). The attacks can reach theoretically unlimited amplification; we measured amplification of over 400,000 against popular web...

Registerwait Faultservice Ready Idle ? Req ! Alarm ! Done ? Ack ? Alarm ! Ack ? Done ! Req

Brand and Zaaropulo BZ83] introduced the model of communicating nite-state machines to represent a distributed system connected with FIFO channels. Several diierent communication protocols can be speciied with this simple model. In this paper we address the problem of automatically validating protocols by verifying properties such as well-formedness and absence of deadlock. Our method is based ...

Redundancy Elimination in DTN via ACK Mechanism

The traditional routing protocols for delay tolerant networks (DTN) usually take the strategy of spreading multiple copies of one message to the networks. When one copy reaches destination, the transmission of other copies not only waste the bandwidth but also deprive other messages of the opportunities for transmission. This paper brings up a mechanism to eliminate the redundant copies. By add...