Purpose and security gap addressed

Portal26 describes enterprise search platforms such as Elasticsearch as powerful for search but vulnerable from a data security standpoint. Indexing for full-featured search — prefixes, suffixes, wildcards and ranges — relies on live data inside the indexes that conventional encryption cannot cover, because encrypted indexes no longer support search. Portal26 notes that while the underlying platform can encrypt data at rest and in transit between nodes via internode TLS, data inside the indexes remains the typical breach point, exposed to external attackers, malicious insiders and accidental exposure.

  • Addresses data-in-use exposure inside Elasticsearch indexes
  • Targets the paradox between encryption and searchability
  • Covers risks from ransomware, insider access and misconfigured clusters

Source: Keeping Elasticsearch data secure from attacks | Portal26

How the plugin works

The plugin extends encryption beyond data-at-rest and data-in-transit to include data-in-use. Sensitive data is preprocessed and encrypted before it is indexed, and incoming queries are intercepted and reformulated so they execute in encrypted form. By default, query results are released in encrypted form, so data that is queried or exfiltrated retains its encryption.

  • Sensitive data encrypted prior to indexing
  • Queries intercepted and reformulated to run encrypted
  • Query results released encrypted by default
  • Clear text access granted on a least-privilege basis

Source: Keeping Elasticsearch data secure from attacks | Portal26

Capabilities

Portal26 lists a set of capabilities delivered by the plugin for Elasticsearch deployments. These cover index encryption, continued search and analytics functionality, protection of query parameters and key management options. The company also states that data can be released in nine secure and private formats, and that the plugin supports data protection requirements associated with FedRAMP.

  • FIPS 140-2 encryption of indexes
  • Full-featured search and analytics without data exposure
  • Protection of query parameters
  • Data release in nine secure and private formats
  • BYOK/HYOK deployment at any granularity
  • Support for FedRAMP data protection requirements

Source: Keeping Elasticsearch data secure from attacks | Portal26

Standards and related technology

The plugin's encryption is described as NIST FIPS 140-2 validated, tying it to the FIPS 140 family of cryptographic module standards. It is built specifically for Elasticsearch, the enterprise search and analytics software, and is deployed as a plugin to existing clusters rather than as a replacement platform.

  • NIST FIPS 140-2 validated searchable encryption-in-use
  • Designed for Elasticsearch clusters
  • Delivered as a plugin

Source: Keeping Elasticsearch data secure from attacks | Portal26

Software Elasticsearch Enterprise search platform whose indexes cannot be encrypted without breaking search, creating a data security gap.
Topic FIPS 140 NIST standard for security requirements for cryptographic modules, explained in a Portal26 blog post.
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Sources

  1. Keeping Elasticsearch data secure from attacks | Portal26 https://portal26.ai/keeping-elasticsearch-data-secure-from-attacks-and-exposure/ Verified 01 Nov 2026

Last verified 01 Nov 2026. This entry is compiled from the public web pages listed above. Nothing here is stated that those pages do not, and each of them was read on the date shown.