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| Content Provider | ACM Digital Library |
|---|---|
| Author | Van renesse, Robbert Zhou, Lidong Schneider, Fred B. |
| Copyright Year | 2002 |
| Abstract | COCA is a fault-tolerant and secure online certification authority that has been built and deployed both in a local area network and in the Internet. Extremely weak assumptions characterize environments in which COCA's protocols execute correctly: no assumption is made about execution speed and message delivery delays; channels are expected to exhibit only intermittent reliability; and with $3\textit{t}$ + 1 COCA servers up to $\textit{t}$ may be faulty or compromised. COCA is the first system to integrate a Byzantine quorum system (used to achieve availability) with proactive recovery (used to defend against mobile adversaries which attack, compromise, and control one replica for a limited period of time before moving on to another). In addition to tackling problems associated with combining fault-tolerance and security, new proactive recovery protocols had to be developed. Experimental results give a quantitative evaluation for the cost and effectiveness of the protocols. |
| Starting Page | 329 |
| Ending Page | 368 |
| Page Count | 40 |
| File Format | |
| ISSN | 07342071 |
| e-ISSN | 15577333 |
| DOI | 10.1145/571637.571638 |
| Volume Number | 20 |
| Issue Number | 4 |
| Journal | ACM Transactions on Computer Systems (TOCS) |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2002-11-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Byzantine quorum systems Certification authority Denial of service Proactive secret-sharing Public key infrastructure Threshold cryptography |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Science |
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