Intrusion Resilient Encryption - PowerPoint PPT Presentation

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Intrusion Resilient Encryption

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... 1 t 2 ... Private key Dt-1 Dt Dt 1 Dt 2 ... Private key exposed. Past ... time period. refreshes. Skamania Lodge June 2003. Non-Simultaneous Exposure of Secrets ... – PowerPoint PPT presentation

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Title: Intrusion Resilient Encryption


1
Intrusion Resilient Encryption
  • Matt Franklin
  • U. C. Davis

2
Key-Evolving Encryption
current private key
public key
message
ciphertext
Alice
Bob
time
message
3
Forward Security
Time t-1 t t1
t2
Private key Dt-1 Dt Dt1
Dt2 ...
Private key exposed
Past Secure
Present/Future Insecure
4
Key-Evolving with Help
updated key for next time period or
Bob
extra info
BobsBase
refreshed key for current time period
5
Intrusion Resilient Encryption

time period
update
update
update
refreshes
6
Non-Simultaneous Exposure of Secrets
Past Secure
Future Secure

Present insecure
7
Simultaneous Exposure of Secrets
Past Secure
Future Insecure

Present insecure
8
References
  • Intrusion-Resilient Encryption
  • Dodis-Franklin-Katz-Miyaji-Yung (RSA 2003)
  • Forward Secure Encryption
  • Canetti-Halevi-Katz (Eurocrypt 2003)
  • Identity-Based Encryption
  • Boneh-Franklin 2001, Gentry-Silverberg 2001
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