---
title: 2023-02-13 Buffer size of signatures
description: We experienced that the buffer sizes (binary) of 30,000 bytes for signatures and 15,000 bytes for timestamps recommended for the CA4 changeover were not al
---

[Swisscom Trust Services > Service Status ](https://trustservices.swisscom.com/en/support/developer-section/service-status-overview)

# [2023-02-13 Buffer size of signatures](https://trustservices.swisscom.com/en/support/developer-section/service-status-overview/2023-02-13-buffer-size-of-signatures)

 Written by [Ingolf Rauh](https://trustservices.swisscom.com/en/support/developer-section/service-status-overview/author/ingolf-rauh) | Feb 13, 2023 10:00:00 AM

We experienced that the buffer sizes (binary) of 30,000 bytes for signatures and 15,000 bytes for timestamps recommended for the CA4 changeover were not always adhered to in the signature applications and led to problems when extending the key size of the OCSP certificate for LTV signatures. Therefore, we ask all signature applications to check the buffer sizes for signatures again in case of problems. See also [Swisscom CA 4 · SwisscomTrustServices/AIS Wiki · GitHub](https://github.com/SwisscomTrustServices/AIS/wiki/Swisscom-CA-4)

[View full post](https://trustservices.swisscom.com/en/support/developer-section/service-status-overview/2023-02-13-buffer-size-of-signatures)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Ingolf Rauh"
  },
  "dateModified" : "2023-05-31T13:48:24.312Z",
  "datePublished" : "2023-02-13T10:00:00Z",
  "headline" : "2023-02-13 Buffer size of signatures",
  "image" : {
    "@type" : "ImageObject",
    "height" : 60,
    "url" : "/hs/hsstatic/content_shared_assets/static-1.4092/img/default-amp-logo.png",
    "width" : 60
  },
  "mainEntityOfPage" : "https://trustservices.swisscom.com/en/support/developer-section/service-status-overview/2023-02-13-buffer-size-of-signatures",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60,
      "url" : "/hs/hsstatic/content_shared_assets/static-1.4092/img/default-amp-logo.png",
      "width" : 60
    },
    "name" : "Swisscom Trust Services > Service Status"
  }
}
```