cliang – Page 10 – The SECOND Advisories Limited

Seasonal Factor

13th March 202213th March 2022 By cliangNo Comments

There are network anomaly detection technologies to alert abnormal network traffic of potential cyberattack. The pre-requisite is let the technology learn the current network traffic pattern as baseline profile. Then anything outside this profile boundary will be treated as anomalies and triggers alert. It is a great technology - no signature or definition update for zero TCO maintenance. All are self-sustained. However, the key question is how long should the technology acquire the correct baseline profile? Some vendors claim just one or two weeks suffices. Really? Even with 80/20 rule, such short duration shall generate many false alerts that eventually affecting confidence. Realistically, duration in a year for setting up the baseline profile deems necessary to fully cover the normal traffic. After all, human perception especially senior management is important for successful deployment. A KPI dashboard shall provide visibility of the value of the technology. Last but not the least, network anomalies detection is just one layer of defense. We should strengthen...

Enforcement #4

28th February 202228th February 2022 By cliangNo Comments

A directive must come with sensible enforcement Cybersecurity policy establishment and cybersecurity policy enforcement are usually executed independently in an organization. Normally, policy authors are more knowledgeable to stipulate the rationale behind whether explicitly or implicitly why protection are required to secure the cyber space of the organization. Enforcement team simply follow the book to provide advisories or perform compliance check. The world is not perfect and situation will drive decision if it is a policy exception or the inadequacy of policy for revision. As cybersecurity practitioner, we must exercise our professional judgment to advise pragmatic approach in helping business for policy compliance rather than just a zero or one decision. After all, a "cyber court" in an organization is uncommon where the "cyber judge" will have the final ruling. Certain cybersecurity practitioners even have mal-practice to involve Senior Management for approval without taking up professional responsibility. Senior Management should be in the informed role rather than an approval role. ...

Opportunist

19th February 202219th February 2022 By cliangNo Comments

Dual signages on display - adopt the appropriate one in particular situation? Policy statement must be clearly defined and published. It must also be precise without ambiguity but subject to interpretation by different parties. If your cybersecurity policies are written unclear, a lot of unnecessary internal overheads of so-called policy exceptions or enforcement issues will be surfaced. Therefore, regular policy review and adjustment is indeed integrated into the policy requirement. And last but not least, don't be aggressive to write something that is not achievable in the specific business environment. ...

Spare Capacity

7th February 20227th February 2022 By cliangNo Comments

Roof needs to cater for extra loading due to different weather conditions Availability is one of the protection objectives in cybersecurity. When deploying new systems, the design must cater for spare capacity. Usage patterns need to be understood too as this will surge capacity demand instantaneously. Capacity refers to bandwidth, storage, processing speed. This must be estimated in the next 3-5 years with the projected growth rate plus the peak demand, setting threshold to trigger alert to resolve the capacity issue. It can be adding more storage, or archiving historical records offline, or deleting records per corporate retention policy. It is part of system management to maintain a healthy cyber environment to run business. Otherwise, business services will be interrupted. ...

Surrealism

22nd January 202222nd January 2022 By cliangNo Comments

It is easy to for artists to draw something or writers compose fictions beyond imagination. Such creation even stimulates innovation that when putting into practice disrupting the industry and our life. However when writing cybersecurity policies, the directives must be pragmatically achievable and effectively enforceable. After all, policies are the internal company rules for every level to comply with. If the rules cannot be achieved, nor enforced, these rules are just a document in the bookshelf. Follow what the industry or the peers do rather than inventing something high-sounding but cannot be landed on the ground. Non-compliance will be the outcome. ...

Purpose of control

8th January 20228th January 2022 By cliangNo Comments

When we deploy control, we always have to understand what we are trying to achieve. In the illustration, if the purpose is just to prevent accidential openning of the cabinet door hurting nearby pedestrian, then something fixes the door in position suffices. There is no need to apply a lock because it will involve key management. Without proper key management, accessing the cabinet inside will be affected. As such, don't impose unnecessary and excessive controls. It won't improve but complicate the use case. ...

Dead End

24th December 202124th December 2021 By cliangNo Comments

Can't turn left nor right and no pass thru ahead Good cybersecurity policies (management directives) should avoid incorrect interpretation nor perception. Further down the road, if policies is not precise generic nor precise specific for just-right coverage - many "policy exceptions" will be resulted. The most incorrect approach is to ask the senior management to approve such exception. The whole game should be the cybersecurity Subject Matter Expert (SME) assesses the area where policies cannot be complied with. The SME shall recommend pragmatic compensating controls and grant temporary approval while senior management is in the role of being informed. We, cybersecurity practitioners, must help senior management to understand cyber risks (mostly perception), how the risks could be exploited n own specific business environment. Like the recent Log4Shell zero-day vulnerability, understand what it is rather than blindly to push applying patches, assess the likelihood of exploitability and stand firm to explain why this is not severe if there are cyber threats intelligence...

Different perspectives

12th December 202112th December 2021 By cliangNo Comments

It is the same scene but different people will interpret it differently. Business managers or plant floor engineers have their mission to achieve in delivering the business outcome while cybersecurity practitioners have their opinions to "ensure" a secure business or operational environment to fulfil their job role. Most often, this creates conflict. As cybersecurity practitioner, we shall never blindly apply academic knowledge because each organization has its own specific ways of doing business. What the book or even the organization security polices themselves are just generic guiding principles. We are all hired to exercise professional judgment, to help business understand the cyber risks and after all it is the business decision to accept. If business has hesitation, then we provide them the big picture, how cyber threats are likely exploited and the practical counter-measures to reduce the likelihood. Essentially, cyber threat is just one of the many operation risks to address. Don't invent extra and unnecessary cyber protections...

We are all just prisoners here, of our own device …

2nd December 20213rd December 2021 By cliangNo Comments

The lyrics from "Hotel California": the song was recorded in 1976 and the prediction is so true Disruptive technologies and their rapid advancement have changed the way we live. With proliferation of Internet hotspot (mostly free) & powerful mobile device (smaller size, powerful processor, larger storage), now everyone is able to get connected from casual reading email, browsing the web, sharing status in social media, chatting via instant message to checking flight status, exchange rates, performing critical decision like confirming high value transactions. With so much convenience, we rely heavily on this tiny device to keep our memories (contact info, photos, reminders), credentials (digital wallet, second factor authenticator) and get connected. We can't afford to lose it nor have it malfunctioned. Otherwise, we shall be handicapped in the physical world. We are now the prisoner of our device … ...

Excessive and Unnecessary Control

19th November 202119th November 2021 By cliangNo Comments

So many locks Adding control won't give you more security. I came across advices from other cybersecurity practitioner that overkills. Indeed, the insecure WiFi is part of this. The whole story is that critical system (simply the Target) is isolated from the Internet. To update the Target with security patches, new anti-malware definition, removable media (simply USB thereafter) is used to transfer the required files obtained from OEM into the Target environment. No doubt there is risk to use USB. A dedicated kiosk scanning station (simply Kiosk thereafter) is established to check for malware clearance before plugging the USB into the Target. So far, everything looks good and sensible. Because the Target using the USB is far away from the Kiosk, the cybersecurity practitioner has an innovation thought to ENSURE the USB must just been scanned by the Kiosk but not inserting a different one by human mistake. In other word, USB must be validated before loading to...