Category: Open Source

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Oct
1

President’s Sabbatical

Alan Viars, founder and president of Videntity, is on sabbatical from Videntity until Spring 2015 during his appointment as an HHS External Entrepreneur at the. . .

Oct
17

Converting Stata files to CSV using R

A simple recipe for converting Stata data into CSV. CSV stands for comma separated valuew. Common uses for this recipe is when you want to. . .

Aug
28

Provider Directory Proposal (NPPES Redux)

A couple of weeks ago, I attended ONC’s Direct Bootcamp in Crystal City, VA. A hot topic at the two-day conference was the notion of. . .

Aug
19

How to Serve Public Certificates with BIND for the Direct Project

Serving public certificates via DNS is quite an obscure endeavor. This is made quite evident by the total lack of documentation on how to serve. . .

Aug
12

Direct Certificate Authority – directca.org

Over the past few months Videntity has built a robust, fully-functional certificate authority designed specifically with the Direct Project in mind. (You can find the. . .

May
5

ce – Certificate Examiner

This is a quick command-line utility for displaying information contained in an SSL certificates and CRLs. It is faster and easier to remember than the. . .

Apr
14

A Command-line Utility & Library to Fetch Revoked Serial Numbers from a Certificate Revocation List (CRL)

This functionality is not available in openssl’s comand line utility, so I cooked this up to do the job. The library function returns a Python. . .

Oct
17

A Collection of Handy Django Authentication Backends

This blog entry desribes three Django Authenticaon backends you can use instead of the default “django.contrib.auth.backends.ModelBackend”. Below is a brief description of each. EmailBackend –. . .

Sep
18

Calculating BMI in Python

If you ever need to calculate Body Mass Index (BMI) in Python, here’s how… -acv

Sep
3

The Problem with Using an HL7-based Format for Blue Button

I’d rather not compete with HL7, but the current state leaves me no choice but to speak up. Yes it would be a step in. . .

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