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A simple definition of volatility is any "storage media that require an external power supply to maintain stored information."[1] More generally, volatility "measures how quickly data disappears from a system."[2] Contemporary information storage technologies encompass a wide range of volatility characteristics (i.e., time preserved, garbage collection procedures, recoverability). Storage technologies can be ranked according to their volatility by aggregating these characteristics; this ranking is sometimes referred to as the order of volatility.
Order of volatility
editRFC 3227 suggests the following order of volatility (from most volatile to least):[3]
- registers, cache
- routing table, arp cache, process table, kernel statistics, memory
- temporary file systems
- disk
- remote logging and monitoring data that is relevant to the system in question
- physical configuration, network topology
- archival media
See also
edit- Volatile memory, Non-volatile memory
- Computer forensics § Volatile data
- Computer data storage § Volatility
- Computer memory § Volatility categories
- Memory hierarchy - ranking storage based on response time
- Computer data storage § Hierarchy of storage - ranking storage based on distance to CPU
- Digital forensics
References
edit- ^ R. Shirey (August 2007). Internet Security Glossary, Version 2. Network Working Group. doi:10.17487/RFC4949. RFC 4949. Informational. Obsoletes RFC 2828.
- ^ Jens-Petter Sandvik; Katrin Franke; Habtamu Abie; André Årnes (April 2022). "Quantifying data volatility for IoT forensics with examples from Contiki OS". Forensic Science International: Digital Investigation. 40 (Supplement). doi:10.1016/j.fsidi.2022.301343.
- ^ Brezinski, D.; Killalea, T. (February 2002). Guidelines for Evidence Collection and Archiving. Network Working Group. doi:10.17487/RFC3227. BCP 55. RFC 3227. Best Current Practice.
Further reading
edit- "Chapter 15 - Collecting and Preserving Digital Evidence". Scene of the Cybercrime (2 ed.). Elsevier. 2008. doi:10.1016/B978-1-59749-276-8.X0001-5. ISBN 978-1-59749-276-8.