Samata Ullah pleaded guilty to being a member of the Islamic State, terrorist training, preparing terrorist acts and possessing articles for terrorist purposes.
The remaining charge will lie on his file, the BBC reported.
When he was arrested on September 22, he had a USB cufflink with an operating system loaded onto it to conceal a hoard of extremist data, including a blog.
The court heard that between December 2015 and his arrest, Ullah had provided instructional videos on how to secure sensitive data and remain anonymous online with the use of encryption programmes.
He also admitted having a book entitled Guided Missiles Fundamentals AFM 52-31 and an electronic version of Advances in Missile Guidance, Control and Estimation for terrorist purposes.
Prosecutor Brian Altman said a hi-tech report dealt with Ullah's desire to copy his blog onto a platform in a "format that meant it could not be closed down or deleted by the authorities".
Ullah, who has been diagnosed with autism, admitted the charges earlier in March but his pleas could not be reported until after the the prosecution had time to consider whether to go ahead with a trial on the remaining charge.
Judge Gerald Gordon lifted reporting restrictions and adjourned the case until April 28.
He said the "issue of dangerousness" would have to be looked at before sentencing.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)