As part of ongoing efforts to enhance system security, OTE is limiting support for cryptographic mechanisms that no longer meet current security standards.

Specifically, this concerns:

• RSA keys shorter than 2048 bits
• hash algorithms MD5 and SHA1

These algorithms and key lengths are considered insufficiently secure and may pose a security risk.

We recommend that all users and partners verify the certificates they use and, if necessary, switch to:

• RSA keys with a minimum length of 2048 bits
• modern hash algorithms (e.g., SHA-256 or higher)