Dynamic security policy

1. A computer implemented method to generate training data for a machine learning algorithm for determining security vulnerabilities of a virtual machine (VM) in a virtualized computing environment, the machine learning algorithm determining the security vulnerabilities based on a vector of configuration characteristics for the VM, the method comprising:

receiving a plurality of VM configuration vectors for each of one or more training VMs, each of the plurality of VM configuration vectors including attributes of a configuration of a VM and having a temporal indication;

receiving a security occurrence identification being referable to a VM configuration vector for a training VM based on a temporal indication of the security occurrence identification,

the security occurrence identification including information defining a temporally corresponding vector of vulnerabilities for the training VM associated with the referenced VM configuration vector, and

pairing the referenced VM configuration vector with the temporally corresponding vector of vulnerabilities as a first training example;

identifying one or more further VM configuration vectors for the training VM, each of the further VM configuration vectors having temporal indications preceding that of the referenced VM configuration vector and no preceding security occurrence identification; and

pairing a modified form of the vector of vulnerabilities with each of the further VM configuration vectors as further training examples, the vector of vulnerabilities being modified for each further VM configuration vector by a reverse decay function such that each temporally earlier VM configuration vector is associated with a modified vector of vulnerabilities indicating vulnerability to a lesser degree.

2. The method of claim 1 , wherein the reverse decay function is a 0.5 kt function based on an increasing time past (t) for a chronologically earlier VM configuration vector and a constant (k).

3. The method of claim 1 , further comprising training the machine learning algorithm based on the training examples to classify a configuration vector for a VM to a vector of vulnerabilities.

4. The method of claim 1 , wherein a vector of configuration characteristics includes an indicator of a state of each of a plurality of configuration characteristics for a VM.

5. The method of claim 1 , wherein a vector of vulnerabilities includes an indicator of each of a plurality of security vulnerabilities of a VM.

6. A computer system comprising:

a processor and memory storing computer program code for generating training data for a machine learning algorithm for determining security vulnerabilities of a virtual machine (VM) in a virtualized computing environment, the machine learning algorithm determining the security vulnerabilities based on a vector of configuration characteristics for the VM, by:

receiving a plurality of VM configuration vectors for each of one or more training VMs, each of the plurality of VM configuration vectors including attributes of a configuration of a VM and having a temporal indication;

receiving a security occurrence identification being referable to a VM configuration vector for a training VM based on a temporal indication of the security occurrence identification,

the security occurrence identification including information defining a temporally corresponding vector of vulnerabilities for the training VM associated with the referenced VM configuration vector, and

pairing the referenced VM configuration vector with the temporally corresponding vector of vulnerabilities as a first training example;

identifying one or more further VM configuration vectors for the training VM, each of the further VM configuration vectors having temporal indications preceding that of the referenced VM configuration vector and no preceding security occurrence identification; and

pairing a modified form of the vector of vulnerabilities with each of the corresponding VM configuration vectors as further training examples, the vector of vulnerabilities being modified for each further VM configuration vector by a reverse decay function such that each temporally earlier VM configuration is associated with a modified vector of vulnerabilities indicating vulnerability to a lesser degree.

7. A non-transitory computer-readable storage element comprising computer program code to, when loaded into a computer system and executed thereon, cause the computer system to perform the method as claimed in claim 1 .