erlang/otp
Oct 2024 – Oct 2025
12 Months active
Languages Used
ErlangMakefileASN.1Markdown
Technical Skills
Backend DevelopmentDocumentationErlangNetwork SecuritySSL/TLSTechnical Writing
Ingela Anderton Andin
PROFILE
Ingela Anderton Andin
Ingela contributed to the erlang/otp repository by engineering robust enhancements to the TLS/SSL stack, focusing on security, interoperability, and maintainability. She implemented hybrid post-quantum cryptography support and expanded protocol compliance, addressing handshake edge cases and improving alert handling. Her work centralized configuration management, refactored connection paths, and modernized the test suite for greater reliability. Using Erlang and ASN.1, she aligned cryptographic modules with evolving standards, introduced new key types, and improved certificate validation. Ingela’s technical approach emphasized clear documentation, rigorous testing, and backward compatibility, resulting in a more secure, standards-compliant, and production-ready backend for distributed systems.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
90Total
Bugs
19
Commits
90
Features
29
Lines of code
17,579
Activity Months12
Your Network
178 people
Work History
October 2025
14 Commits • 4 Features
Oct 1, 2025Month: 2025-10 Concise monthly summary for erlang/otp focusing on security, reliability, and maintainability of the TLS/SSL stack. Delivered a set of features and fixes that improve interoperability with other systems, resilience to protocol edge cases, and readiness for post-quantum cryptography, while ensuring OTP 29.0 compatibility in supervision tooling. Key features delivered: - TLS Handshake Robustness and Protocol Compliance: Strengthened handshake interoperability by directly using known binder lengths, correctly handling pre_shared_key extensions, and preventing invalid Change Cipher Spec sequences. - SSL Hybrid Post-Quantum Cryptography Support: Added hybrid PQA support, including public key generation for hybrid curves and mapping of algorithms to curves and ML-KEM parameters. - SSL Test Suite Improvements: Introduced test helpers, refactoring to reduce duplication, and overall reliability improvements in the SSL test suite. - Documentation Update: Supervisor Version Tag alignment to OTP 29.0 stop/1 and stop/3 compatibility. Major bugs fixed: - TLS Sender: Key Update Messaging Robustness: Fix incorrect internal acknowledgment messages during sender-initiated TLS key updates; ensure acknowledgments are only sent for peer-triggered key updates; includes tests. - SSL Alert Handling Bug Fix: Correct routing of alerts in SSL gen_statem through handle_own_alert rather than local returns. Overall impact and accomplishments: - Increased TLS interoperability and security posture by preventing invalid protocol behavior and ensuring correct alert handling, reducing risk in secure communications. - Enhanced security readiness with post-quantum capabilities and forward-looking cryptographic options. - Improved maintenance efficiency and test coverage, leading to faster validation cycles and fewer regressions. Technologies/skills demonstrated: - TLS/SSL protocol internals, Erlang/OTP codebase changes, robust test harness development, and test suite modernization. - Secure protocol design practices, compatibility with OTP 29 lifecycle, and hybrid cryptography integration.
14 Commits • 4 Features
Oct 1, 2025Month: 2025-10 Concise monthly summary for erlang/otp focusing on security, reliability, and maintainability of the TLS/SSL stack. Delivered a set of features and fixes that improve interoperability with other systems, resilience to protocol edge cases, and readiness for post-quantum cryptography, while ensuring OTP 29.0 compatibility in supervision tooling. Key features delivered: - TLS Handshake Robustness and Protocol Compliance: Strengthened handshake interoperability by directly using known binder lengths, correctly handling pre_shared_key extensions, and preventing invalid Change Cipher Spec sequences. - SSL Hybrid Post-Quantum Cryptography Support: Added hybrid PQA support, including public key generation for hybrid curves and mapping of algorithms to curves and ML-KEM parameters. - SSL Test Suite Improvements: Introduced test helpers, refactoring to reduce duplication, and overall reliability improvements in the SSL test suite. - Documentation Update: Supervisor Version Tag alignment to OTP 29.0 stop/1 and stop/3 compatibility. Major bugs fixed: - TLS Sender: Key Update Messaging Robustness: Fix incorrect internal acknowledgment messages during sender-initiated TLS key updates; ensure acknowledgments are only sent for peer-triggered key updates; includes tests. - SSL Alert Handling Bug Fix: Correct routing of alerts in SSL gen_statem through handle_own_alert rather than local returns. Overall impact and accomplishments: - Increased TLS interoperability and security posture by preventing invalid protocol behavior and ensuring correct alert handling, reducing risk in secure communications. - Enhanced security readiness with post-quantum capabilities and forward-looking cryptographic options. - Improved maintenance efficiency and test coverage, leading to faster validation cycles and fewer regressions. Technologies/skills demonstrated: - TLS/SSL protocol internals, Erlang/OTP codebase changes, robust test harness development, and test suite modernization. - Secure protocol design practices, compatibility with OTP 29 lifecycle, and hybrid cryptography integration.
October 2025
September 2025
10 Commits • 3 Features
Sep 1, 2025September 2025 focused on strengthening the OTP TLS stack, expanding configurability, and stabilizing CI/tests. Key outcomes include TLS security enhancements with hybrid MLKEM support, configurable key share groups, and integration of new MLKEM algorithms in public key generation. In addition, critical TLS bugs were fixed to improve reliability and security: max_fragment_length handling regression fixed, and SSL handshake extensions uniqueness hardening to prevent duplicates. SSL configuration flexibility was improved by relaxing keyfile requirements to allow a single file containing both certificate and private key, plus a key_entry helper to extract the key. Documentation and operational transparency were enhanced with an updated SECURITY.md reflecting current maintenance status and OTP 28 support, along with CI/test stability improvements to guard against risky benchmarks on 32-bit Windows. Overall, these changes reduce security risk, simplify deployment, and improve reliability, aligning with OTP roadmap and production SLAs.
September 2025
10 Commits • 3 Features
Sep 1, 2025September 2025 focused on strengthening the OTP TLS stack, expanding configurability, and stabilizing CI/tests. Key outcomes include TLS security enhancements with hybrid MLKEM support, configurable key share groups, and integration of new MLKEM algorithms in public key generation. In addition, critical TLS bugs were fixed to improve reliability and security: max_fragment_length handling regression fixed, and SSL handshake extensions uniqueness hardening to prevent duplicates. SSL configuration flexibility was improved by relaxing keyfile requirements to allow a single file containing both certificate and private key, plus a key_entry helper to extract the key. Documentation and operational transparency were enhanced with an updated SECURITY.md reflecting current maintenance status and OTP 28 support, along with CI/test stability improvements to guard against risky benchmarks on 32-bit Windows. Overall, these changes reduce security risk, simplify deployment, and improve reliability, aligning with OTP roadmap and production SLAs.
August 2025
3 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for erlang/otp focused on reliability, protocol conformance, and test ecosystem improvements. Delivered three key outcomes: (1) RFC 5652 SignedAttributes mapping fix in the CryptographicMessageSyntax-2009 ASN.1 module to ensure correct handling of SignedAttributes, (2) DTLS sockname reporting fix with added tests validating local socket reporting for DTLS connections, and (3) SSL test suite modernization to improve organization and readability across client/server certificate suites and SSL algorithms. These changes reduce risk in secure messaging, improve DTLS correctness, and streamline regression testing across TLS/DTLS components.
3 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for erlang/otp focused on reliability, protocol conformance, and test ecosystem improvements. Delivered three key outcomes: (1) RFC 5652 SignedAttributes mapping fix in the CryptographicMessageSyntax-2009 ASN.1 module to ensure correct handling of SignedAttributes, (2) DTLS sockname reporting fix with added tests validating local socket reporting for DTLS connections, and (3) SSL test suite modernization to improve organization and readability across client/server certificate suites and SSL algorithms. These changes reduce risk in secure messaging, improve DTLS correctness, and streamline regression testing across TLS/DTLS components.
August 2025
July 2025
14 Commits • 3 Features
Jul 1, 2025Monthly summary for 2025-07 focused on strengthening TLS security posture, extending TLS 1.3 capabilities, and improving certificate/file handling in erlang/otp. Key deliveries include TLS 1.3 ML-DSA and ML-KEM support, enhanced RSA-PSS parameter handling and certificate validation, ASN.1/Enrollment extension support, and TLS/SSL configuration hardening plus robust file handling for certificates and CRLs. Impact: reduced security risk, clearer operational diagnostics, and better readiness for TLS 1.3 deployments in production. Technologies demonstrated: Erlang/OTP, TLS 1.3 features, ML-DSA/ML-KEM, ASN.1, TBSCertificate, certificate management, and test-driven improvements.
July 2025
14 Commits • 3 Features
Jul 1, 2025Monthly summary for 2025-07 focused on strengthening TLS security posture, extending TLS 1.3 capabilities, and improving certificate/file handling in erlang/otp. Key deliveries include TLS 1.3 ML-DSA and ML-KEM support, enhanced RSA-PSS parameter handling and certificate validation, ASN.1/Enrollment extension support, and TLS/SSL configuration hardening plus robust file handling for certificates and CRLs. Impact: reduced security risk, clearer operational diagnostics, and better readiness for TLS 1.3 deployments in production. Technologies demonstrated: Erlang/OTP, TLS 1.3 features, ML-DSA/ML-KEM, ASN.1, TBSCertificate, certificate management, and test-driven improvements.
June 2025
4 Commits • 2 Features
Jun 1, 2025Concise monthly summary for 2025-06 focused on business value and technical achievements in the erlang/otp repository. Improvements center on cryptographic standards alignment, expanded key support, and TLS robustness, enabling broader interoperability, security, and compliance for a growing user base.
4 Commits • 2 Features
Jun 1, 2025Concise monthly summary for 2025-06 focused on business value and technical achievements in the erlang/otp repository. Improvements center on cryptographic standards alignment, expanded key support, and TLS robustness, enabling broader interoperability, security, and compliance for a growing user base.
June 2025
May 2025
3 Commits • 1 Features
May 1, 2025Concise monthly summary for 2025-05 focusing on key features delivered, major bugs fixed, and overall impact for the erlang/otp repository. Emphasis on business value, reliability, and cryptographic capability improvements.
May 2025
3 Commits • 1 Features
May 1, 2025Concise monthly summary for 2025-05 focusing on key features delivered, major bugs fixed, and overall impact for the erlang/otp repository. Emphasis on business value, reliability, and cryptographic capability improvements.
March 2025
11 Commits • 2 Features
Mar 1, 2025Month 2025-03 – erlang/otp: Delivered key SSL/TLS reliability and testing improvements across the codebase. Highlights include: SSL CRL caching improvements with a per-entry key (host, port, distribution point path) enabling precise lookups and deletions; updates to make_certs.erl and tests; and new options for revocation checking and OCSP stapling. TLS sender cleanup and refactor reduced dead code and simplified handshake state management, with internal structures renamed for clarity. TLS-1.3 traffic secrets handling in tests fixed nondeterministic logging order issues and added helper functions to determine client/server roles. Documentation and licensing updates for SSL components completed to align with licensing and contributor notes. Overall, these changes improve security posture, reliability, and developer productivity.
11 Commits • 2 Features
Mar 1, 2025Month 2025-03 – erlang/otp: Delivered key SSL/TLS reliability and testing improvements across the codebase. Highlights include: SSL CRL caching improvements with a per-entry key (host, port, distribution point path) enabling precise lookups and deletions; updates to make_certs.erl and tests; and new options for revocation checking and OCSP stapling. TLS sender cleanup and refactor reduced dead code and simplified handshake state management, with internal structures renamed for clarity. TLS-1.3 traffic secrets handling in tests fixed nondeterministic logging order issues and added helper functions to determine client/server roles. Documentation and licensing updates for SSL components completed to align with licensing and contributor notes. Overall, these changes improve security posture, reliability, and developer productivity.
March 2025
February 2025
5 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for erlang/otp development work focusing on TLS security hardening, SNI handling resilience, and supervisor documentation improvements. Four targeted items delivered to enhance security, reliability, and maintainability, delivering business value in security posture, interoperability, and developer experience.
February 2025
5 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for erlang/otp development work focusing on TLS security hardening, SNI handling resilience, and supervisor documentation improvements. Four targeted items delivered to enhance security, reliability, and maintainability, delivering business value in security posture, interoperability, and developer experience.
January 2025
13 Commits • 3 Features
Jan 1, 2025January 2025 (erlang/otp) monthly summary focused on strengthening SSL/TLS handshake reliability, security posture, and debugging observability. Key features delivered include: NSS keylog callback for improved debugging and Wireshark integration; SSL/TLS upgrade process refactor consolidating upgrade logic into tls_socket:upgrade/4 for clarity and reduced duplication; internal SSL API and interface improvements to tighten type specs and error handling. Major bugs fixed cover handshake reliability and CA interoperability: user-cancelled SSL/TLS handshake alerts for graceful termination and clearer shutdown reasons; certificate key usage compatibility improvements for TLS client/server authentication with CAs; removal of duplicate TLS signature schemes to ensure correct negotiation; postponing server option verification during the {handshake, hello} flow to improve handshake compatibility; DTLS termination robustness improvements to prevent crashes and align with protocol expectations. These changes collectively reduce handshake failures, improve interoperability with certificate authorities, and enhance debugging and maintainability. Technologies demonstrated include TLS/SSL, NSS keylog integration, DTLS, certificate handling, handshake workflows, code refactoring, and API design for maintainability and clarity.
13 Commits • 3 Features
Jan 1, 2025January 2025 (erlang/otp) monthly summary focused on strengthening SSL/TLS handshake reliability, security posture, and debugging observability. Key features delivered include: NSS keylog callback for improved debugging and Wireshark integration; SSL/TLS upgrade process refactor consolidating upgrade logic into tls_socket:upgrade/4 for clarity and reduced duplication; internal SSL API and interface improvements to tighten type specs and error handling. Major bugs fixed cover handshake reliability and CA interoperability: user-cancelled SSL/TLS handshake alerts for graceful termination and clearer shutdown reasons; certificate key usage compatibility improvements for TLS client/server authentication with CAs; removal of duplicate TLS signature schemes to ensure correct negotiation; postponing server option verification during the {handshake, hello} flow to improve handshake compatibility; DTLS termination robustness improvements to prevent crashes and align with protocol expectations. These changes collectively reduce handshake failures, improve interoperability with certificate authorities, and enhance debugging and maintainability. Technologies demonstrated include TLS/SSL, NSS keylog integration, DTLS, certificate handling, handshake workflows, code refactoring, and API design for maintainability and clarity.
January 2025
December 2024
3 Commits • 1 Features
Dec 1, 2024Month 2024-12 — Delivered an SSL/TLS subsystem refactor for the Erlang/OTP repository, centralizing configuration management in ssl_config.erl, streamlining SSL/TLS/DTLS connection paths by removing redundant abstractions, and boosting startup efficiency via supervisor interactions (supervisor:which_child/2). This work improves runtime reliability, maintainability, and startup performance, aligning with security and performance objectives.
December 2024
3 Commits • 1 Features
Dec 1, 2024Month 2024-12 — Delivered an SSL/TLS subsystem refactor for the Erlang/OTP repository, centralizing configuration management in ssl_config.erl, streamlining SSL/TLS/DTLS connection paths by removing redundant abstractions, and boosting startup efficiency via supervisor interactions (supervisor:which_child/2). This work improves runtime reliability, maintainability, and startup performance, aligning with security and performance objectives.
November 2024
6 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for erlang/otp: Hardened crypto stack, expanded key support, and improved code quality. Focused on security validations for SSL/TLS, EDDSA public key decoding, and documentation standards in the build. Deliverables strengthen production security posture, improve robustness of certificate handling, and raise maintainability through standardized documentation checks.
6 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for erlang/otp: Hardened crypto stack, expanded key support, and improved code quality. Focused on security validations for SSL/TLS, EDDSA public key decoding, and documentation standards in the build. Deliverables strengthen production security posture, improve robustness of certificate handling, and raise maintainability through standardized documentation checks.
November 2024
October 2024
4 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for the erlang/otp repository. Delivered targeted SSL/TLS improvements, including test infrastructure reliability, compatibility enhancements for older TLS clients, and documentation clarity. This period focused on concrete code changes with measurable business value and clear technical outcomes.
October 2024
4 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for the erlang/otp repository. Delivered targeted SSL/TLS improvements, including test infrastructure reliability, compatibility enhancements for older TLS clients, and documentation clarity. This period focused on concrete code changes with measurable business value and clear technical outcomes.
Activity
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Quality Metrics
Correctness90.8%
Maintainability88.4%
Architecture86.4%
Performance82.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
ASN.1ErlangMakefileMarkdown
Technical Skills
API DevelopmentASN.1ASN.1 ParsingBackend DevelopmentBuild System ConfigurationCallback FunctionsCertificate GenerationCertificate ManagementCertificate Revocation Lists (CRL)Certificate ValidationCode OrganizationConfiguration ManagementCryptographyDTLSDebugging
Repositories Contributed To
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