Analysis Bureau ( Imperial Intelligence ) Analysis Bureau was a bureau of Imperial Intelligence responsible for handling large amounts of data from tens of millions of sources , searching for enemy activity by analyzing the patterns or trends in the data they handle and transmitting the information to Intelligence . Analysis also handled , examined and copied useful technologies , even developing a few of their own . Media . Media was a branch of Analysis responsible for the handling of public scandocs , newsdocs , holos , comlinks , beamcasts , and every form of media in the Galactic Empire . They searched for patterns of hidden meanings which might betray a clue as to an enemy ' s plan and operation . Utilizing Sector Plexus and the Imperial CompLink , Media gave a cursory examination of all media within the Empire simultaneously . While they regularly concentrated on a significantly smaller portion of the Empire , they did make professional judgments on whether or not a new media source should be monitored on a more regular basis . Signal . Signal examined the channel through which information was transmitted . Signal sampled and checked carrier wave codes and CompLink protocols , scan rates on scandocs , and image packs on holos to see if any vital information was being squeezed through . Signal examined line noise to check if it contained a pattern rather than random error , and broadcasts and beamcasts to see if the backup information sent with the primary information matched , and , if not , how they differed . Signal was notorious for overreaching itself , applying blindingly sophisticated mathematical techniques to arrive at nonexistent meanings from chaotic data . However , it was Signal that discovered that Leia Organa had the plans to the Death Star through the analysis of un - shielded ELEL ( Extremely Low Energy Level ) transmission from her ship , the " Tantive IV " . Cryptanalysis . Formed from the Cryptanalysis Department of the SBI , this division was responsible for all code - breaking . All evidence of coded communication found through Media and Signal ' s work were transferred to the Cryptanalysis branch . Calling themselves " lignyots , " agents of Crypt had a reputation for bizarre and unprofessional behavior ; they would often send scandocs to other branches in simple codes , which would mutate into an unflattering holo if not broken quickly enough . At other times , they would try to break the security of the communications between branches , forging inflammatory messages on secure channels . They would often move the entrance to their offices or relocate their facilities entirely , leaving only a puzzling scandoc written in code to hint at their new location . All communications to the Sector Plexus from the new branch office had invariably been relayed through thousands of points before reaching Sector Plexus , making successful tracing almost impossible . Their behavior caused other bureaus to complain to the Ubiqtorate , but they saw it as more of an opportunity than a problem , and whenever Crypt did something off - beat , another branch was assigned to deal with the problem as if it were an example of enemy - generated activity . However , Crypt calmed down after one of their branch offices was relocated , and found and liquidated by Assassination within eight days . Tech . Tech was the branch of Analysis responsible for analyzing an enemy ' s hardware , figuring out how it worked and devising methods to provide Intelligence with superior hardware . Tech was given a lavish budget and a number of highly skilled personnel whose moments of brilliant inspiration could translate into innovative technology . The administration , however , which was chosen from scientists and technologists within the branch , were often lost when having to decide upon the proper priorities for projects which were outside their areas of expertise . Tech did a better job analyzing enemy gear than in producing its own ; with the hardware in front of them and orders to figure out how it worked , Tech scientists did the job better than anyone else . It was when they had to set their own goals and criteria for the project ' s success did the process go awry . Interrogation . Interrogation was responsible for the handling of enemy agents captured by Imperial Intelligence . Interrogation was not as bloodthirsty as their counterparts in the Imperial Security Bureau , which would reduce their effectiveness in cracking prisoners . Nevertheless , they had a larger purpose , working on the assumption that the Rebellion would work as hard as possible to render any divulged information useless . Unless the captive agent was believed to hold vital information , interrogation was minimal . A larger number of psychological probes were made of the prisoner , and direct neuroprogramming of susceptible prisoners would result . Their techniques were undetectable by everything but the most advanced medical probes , of which there were very few and every one of which was under Imperial control . While expensive , the reprogrammed Rebels had a high reliability as double - agents , and had provided Infiltration with some of their best agents . The Rebellion eventually became aware of these reprogrammed agents , but Interrogation modified its approach . Releasing more Rebels than they once did , including some fairly valuable to the Rebellion , they only reprogrammed several . As suspicion fell on all of the released prisoners , the Rebellion was torn whether or not to accept any , all or none . The doubt and debate did significantly lower the morale at some Rebel bases . The second modification was to use image surgery on a reprogrammed agent , and have Infiltration brief him and then have him join the Alliance as an unknown recruit . While this method took considerable time , no agent who had been infiltrated this way had ever been discovered .