A man has appeared in court on terror charges including storing a computer operating system in a cufflink.
Samata Ullah, 33, of Rennie St, Cardiff, faces six charges including membership of so-called Islamic State.
He is accused of giving terrorist training in the use of encryption programs, possessing a missile guidance book and directing terrorism.
Mr Ullah was remanded in custody by Westminster Magistrates Court until 28 October.
He will appear at the Old Bailey on that date.
The court heard the alleged offences took place between 1 December 2015 and 22 September 2016.
It is alleged the defendant was responsible for a blog site said to contain information about Islamic State and cyber-security guidance.
He was also charged with assisting others to commit acts of terrorism by researching an encryption program, developing an encrypted version of his blog site, and "directing the activities of an organisation which is concerned in the commission of acts of terrorism".
Mr Ullah was arrested in Cardiff on 22 September.