1
2	Agenda
3
4
5
6
7
8
9
10
11
12
13	Microphotograph of CD
14	Binary Code O=01101111 G=01100111 C=01000011 I=01001001 O=01101111
15	OGCIO in Binary Code 01101111 01000111 01000011 0100100101101111 OGCIO
16	NSA Guidelines for Optical Discs: NSA/CSS 04-02
17	Digital Data Destruction Technologies
18	5 Levels of Digital Destruction Level 1: Dimple (or break discs) Level 2: Strip-cut Level 3: Cross-cut Level 4: Disintegrator Level 5: Grind (Information Bearing Layers)
19	Recipe for Reconstruction: How to Reassemble Digital Data
20	Dimple
21	Dimple
22	Dimple
23	Strip Cut
24	Strip Cut
25	Cross Cut
26	Cross Cut
27	Disintegrator
28	Disintegrator
29	Grind
30	Contact Information
31	Near Term Future for Digital Data Destruction Products and Services
32	Best Safe Practices
33	Best Safe Practice Chart Level 1: Break disc in half; scratch disc with knife; put dimples on disc (data is nearly 100% retrievable but cannot retrieve with CD-ROM of DVD drive. Completely unsafe. Level 2: Strip cut - adapted from paper shredder technology. Data is intact except on the edges of the strip cut. Unsafe. Level 3: Cross cut - adapted from paper shredder technology. Data is intact except on the edges of the pieces. Must be 5mm or smaller to have any deterrent affect. Unsafe. Level 4: Difficult to retrieve. Disintegrators chop the entire media to small pieces. Individual pieces will retain some data. Costly, but not impossible to retrieve useful information with certain technical processes. Safe, unless the technical process to reconstruct data is known and significant resources are available to the adversary. Level 5: Safe – process & method removes 100% of data on media. Impossible to retrieve any data. 100% secure destruction method.