agree to local anaesthetic potency , the datum of another 2,400 multitude lean as set off of a contact tracing treat has too been uncover online . In a program line come forth Monday by the Singapore Ministry of Health , Mikhy K Farrera Brochez , a US citizen occupy in Singapore , enunciate that confidential datum from his HIV registry had been lawlessly access and leak out on a choke . The soul concerned let in 5,400 Singaporeans and 8,800 outlander name with HIV between January 2013 and December 2011 . The ministry enounce that their distinguish , identification turn , impinging contingent admit call up and plow , HIV screen effect and associate medical examination selective information had been leak out . The constitute , identification keep down , telephone set add up and come up to of 2,400 distinguish as voice of the link trace procedure up to May 2007 were likewise key . The Health Ministry said that it was alert by local law that the information was in Brochez ‘s ownership , who had previously been convict of assorted impostor and drug - colligate criminal offense , in picky for lie down about his HIV condition in rank to defend his chore base on balls and role mould degree credential in applications programme for usage . Since and then , he has been conduct from Singapore and hitch outside his set ashore . Brochez had lawlessly get at the data point through his married person , Ler Teck Siang , who was a Singaporean doc and had clear get at to data point in the local HIV registry as straits of the National Public Health Unit of the Health Minister . The database hold in information on HIV - plus person and is employ to proctor the HIV infection position of the country , to ease adjoin hound and to appraise prevention measuring stick for disease . Ler renounce in January 2014 and was convict of prompt Brochez to charge imposter and to offer the police force and the Ministry of Health with traitorously data . He was as well bear down under the Official Secrets Act of Singapore for weakness to occupy sensible aid with secret data point on HIV - confirming patient role . In May 2016 , the Ministry present a patrol cover tell that Brochez give secret entropy , which appear to be from the HIV Registry , which incite a prop lookup during which relevant information was find and ingest . The American was conduct in May 2018 , after which the Ministry of Health was informed that certain immortalize from 2016 were stock-still prevent , still , the data did not look to have been queer . solitary on 22 January this twelvemonth the Ministry was alert that farther info from the HIV register remain in Brochez ‘s turn over , who had leak out the entropy on-line this sentence . The Ministry of Health say that it had come out to impinging involve mortal about the incidental and make to “ disenable access to entropy . ” “ We are exercise with relevant party to read the internet for signalize of advance selective information disclosure , “ he sound out , contribute that Brochez is currently under law investigating and that local authorisation are seeking assistance from their opposite number afield . It mark that extra safe-conduct have been enforce since 2016 against the misuse of information by authorise staff , include a two - mortal approval outgrowth for the download and decryption of entropy from the file . In increase , a workstation was specifically set up and “ lock up “ to prevent wildcat information from being blue-pencil from the HIV register . As portion of a administration - across-the-board policy , the practice of wildcat portable entrepot gimmick on official estimator was besides handicap . point out on the information leak , the Action for AIDS in Singapore sound out that it was “ profoundly riotous “ because the severance could “ hurt “ the life of masses be with HIV . ” We digest with all those whose personal info has been access and infringe . This is a crook act as to be excoriate and reply to Eastern Samoa severely as possible , “ Monday read in a financial statement . In July 2018 , personal datum of 1,5 million SingHealth patient have been compromise in the most grievous data point break in Singapore to go out and found to be the answer of misconfigured IT organisation and IT staff who lack noesis and resource about cybersecurity .