Jeffrey Altman
Founder And CEO at AuriStor, Inc. (formerly Your File System, Inc.)
New York, New York, United States
Summary
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SeniorJeffrey Altman is a founder and CEO with 27+ years focused on secure data communications and distributed file systems, currently leading AuriStor to modernize AFS-era global namespaces for cloud and enterprise use. He built Secure Endpoints to bring open-source security tools to Windows and has driven practical Kerberos and PKI interoperability work used across multiple platforms. An active maintainer and contributor to Heimdal and MIT krb5, his low-level fixes and security patches improved cross-platform compatibility and robustness in critical authentication libraries. Jeffrey blends deep protocol and systems expertise with a pragmatic entrepreneurial streak—securing SBIR funding early on and preserving backward compatibility for legacy clients while enabling high-performance WAN-scale deployments. Based in New York, he also serves as an OpenAFS elder and has a long history of influencing IETF and open-source security projects, a pattern that keeps his work both standards-driven and application-focused.
26 years of coding experience
Stackoverflow
26reputation
422reached
2answers
0questions
Github Skills (24)
debug10
system-programming10
kerberos10
authentication10
authenticate10
c1110
security10
c1710
auth10
winapi9
compatible9
wp-api9
memory-management9
ws-api9
compatibility9
Programming languages (12)
Github contributions (5)
krb5/krb5
Jun 1999 - Jul 2008
mirror of MIT krb5 repository
Role in this project:
Back-end Developer
Back-end DeveloperContributions:481 commits, 3 comments in 9 years 2 months
Contributions summary:Jeffrey primarily worked on the internal code for the Kerberos 5 authentication protocol. Their commits involved modifying and expanding the capabilities of the authentication libraries, including the handling of ticket flags, default realm resolution, and support for the "kadmin/changepw" functionality. The user appears to have also improved the Windows support, including adjusting the internal data structures and interfaces. The user’s work was focused on improving the core functionalities and interoperability in the Kerberos authentication system.
krb5mitlinuxwindows
heimdal/heimdal
Nov 2010 - Nov 2022
Heimdal
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 releases, 60 reviews, 644 commits in 12 years 2 months
Contributions summary:Jeffrey made several changes to the Heimdal project, focusing on low-level system libraries and the Kerberos protocol implementation. Their work included fixing compiler issues on specific operating systems, addressing potential security vulnerabilities, and improving the functionality of the Kerberos key management system. Additionally, the user updated calling conventions and addressed memory leaks, contributing to the project's stability and compatibility. Their contributions were targeted towards improving internal code quality.
gssapikerberosrokenkrb5krb5-kdc
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